1

Contents

2

1 Preface

5

2 Research Digest

7

3 Message from Foreign Participants

21

4 Members

25

5 Research Life31

6 Prizes and Awards

33

7 List of Collaborative Research

39

8 Research Funds

43

9 List of Patents

49

10 Committees of Academic Societies and Conferences

50

11 List of Presentations

51

12 List of Publications

73

13 Copies of Selected Papers

83

14 TV, Journals and Newspaper Items.pdf

135

15 List of Events

144

16 Events and Memories

145

3

Preface
The report in your hands is intended to give a general impression about research activityof the Yoshikawa Laboratory in the Institute for Materials Research (IMR), Tohoku
University. This is the first report of my laboratory as official Research Division in IMR(originally established in April, 2007 as Yoshikawa Group at IMRAM). It contains asummary of our various activities and copies of our selected publications. We hope thatyou will find it interesting and informative.
This year, major part of the time is devoted to earthquake disaster reconstruction,
however, thanks to the kind help from all over the world, all the equipments weresomehow restored by the end of 2011.
Current issue covers our activity within academic year from April 2011 to March 2012.
Within this period we put our efforts to develop our key technologies and understand thescience behind them. Highlights of this year are three items. One is the further progress of6
LiCAF for neutron detection as an alternative of 3He. Second is the establishment of
micro-pulling down method for halide materials. Now, it is available to grow hygroscopic
materials like LaBr3 by the micro-pulling down method. Third one is a new topic. National
project about shaped crystal growth of langasite type CNGG and CTGS for combustion
pressure sensor has been started.
When we try to develop novel scintillator crystals, there are plenty of topics, which wehave to study, such as design of host lattice from both solid state chemistry point of view
and physical point of view. In the multicomponent garnet study, we found that the relative
position between band gap and position of dopant level are key issue. Moreover, single
crystal growth technology, optical characterization, understanding of luminescenceprocesses, searching for the suitable photo detector, reflector, light guide and so on are also
very important.
This year, we attempted to apply this concept to other topics such as piezoelectricmaterials and got positive results.
These activities are always supported by our colleagues from all over the world throughthe fruitful collaboration.
Details of these studies can be found in the photos and papers published within theabove period and included in this report.
All the lab. members took part in preparation of this report. I appreciate their efforts
very much. I wish also thank to all of our colleagues from Japan and overseas that had
participated in our research and significantly contributed to the progress of our projects.
Akira YOSHIKAWA

Professor,
Institute for Materials Research (IMR),
New Industry Creation Hatchery Center (NICHe),
Tohoku University
March, 20124

5

Research Digest

67Research Activities in 2011
Development of
Scintillator, Laser, Piezoelectric crystals
Crystal growth technology and device application

Materials for gamma-ray detection

Multicomponent Ce-doped garnet scintillators
Balanced composition band gap engineering and energylevel positioning

Int’l collaboration

Inst. Phys. (Czech), CB, Univ. Lyon1 (France), Milan-Bicocca Univ. (Italy),
Soltan Institute for Nuclear Studies (Poland), Delft Univ. of Tech. (The Netherlands)

Oxide
Scintillators
PEM
PET/MRI

HalideScintillators

Multidisciplinary Researchfor“Characterization”
and“Device application”

1.2

Transparent
Ceramics
Scintillators

Combustion sensor,
SAW filter, …

G-PMT, APD, MPPC,
MSGC, GaN, …

Piezoelectric
Crystals

Development of
new photodetectors

40
b

35
30
25

intensity (arb. units)

Neutron imager,
VUV scintillator

Lu2Gd1Al3Ga2O12
Lu3Al3Ga2O12

Gd3Al3Ga2O12
Lu1Gd2Al3Ga2O12

Faster response (20ns) than Ce-doped
materials, good light yield

Czochralski growth –high quality crystals

1
0.8
0.6
0.4
0.2

20

Gd3Lu0 0

15

Gd2Lu1

300

400

500

wavelength (nm)

600

700

Gd1Lu210

Gd0Lu3

5
0

Application:

GammaSpotter detector
by Furukawa Co.

Composition screening
by Micro-pulling down

RL 5d1-4f peak intensity (arb. units)

Fluoride
Scintillators

High light yield
42000 photons/MeVFound for
Gd3Ga3Al2O12:Ce!! 90ns
decay timeMulticomponent
Pr-doped garnet scintillators

0

1
2
3
4
Ga concentration (x in chem. formula)

5

Emission peak intensity andposition on Ga concentration.

Gd3Ga3Al2O12:CeK. Kamada et al.,Crystal Growth and Design 11 (2011) 4484-4490

Materials for neutron detection

B-containing crystals

0.5 % Ce-doped SrB2O4

K. Kamada et al.,IEEE Trans. Nucl. Sci. 59 (2012) 2130 - 2134

Support Industry by“Japan Science and Technology Agency(JST)”

Materials for X-ray detection
Nd:YAP crystals

0.5 % Ce-doped CaB2O4

Univ., National Inst.
Univ. of Tokyo (Kamiokande, Takahashi Lab.), Kyoto Univ.(Tanimori Lab.),
Nagoya Univ. (Iguchi Lab., Uritani Lab.), Osaka Univ.(Sarukura Lab.),Hiroshima Univ.(Fukazawa Lab.), Kyushu Univ.(Ishibashi Lab.), Waseda Univ. (Kataoka Lab.)

Company
8Tokuyama, Furukawa, TDK, MGC, Kobe Steel, Koike, Murata Manufacturing,
Canon, Chiyoda technol, Nihon Kessho Kogaku, Tanaka metal, Furuya metal,
Akita Seiko, Aoyama Seiko, TEP, Toei, Star Seiki, Koshuha Nestle

Radio-luminescence spectra under X-ray irradiation
showed several emission peaks and the strongest peak
was observed at 395 nm (2F(2)5/2–4F5/2 transition).
9Development of fluoride scintillator
Neutron scintillators alternatives to 3He【Luminescence center】
Electronic orbit transition
luminescence of RE ions

【 Reaction 】
6Li ＋n → 3H ＋α-ray

Excitation

Neutron6Li
6Li

α-ray RE
6Li

Aim of this work was to prepare new halide materials for radiation detectors(scintillators and photodetectors) and study their optical properties. Single crystalsof SrI2, Eu:SrI2, LaBr3, RbPb2Cl5, Nd:RbPb2Cl5 and Yb:RbPb2Cl5 were prepared by
the micro-pulling-down (μ-PD) method and by the vertical Bridgman method.
Grown crystals are shown below.
Experimental arrangement of halide m-PD machine.

Scintillation

6Li

High-frequency induction coil

Baggage-screening at Airport
by using the neutron systems

Scintillator crystal
Luminescence mechanism of neutron scintillator.

CCD camera
Turbo molecular pump

Eutectic composite
scintillators

Removable chamber

CrystalgrowthRemovable chamber

Setting chamberin globe box

Halides are hygroscopic materials which easily react with air and air moisture under formation of oxy- and hydroxyhalides, though careful handling of starting materials under protective argon atmosphere in globe box is required.

Photograph and SEM image of
LiF/CaF2:Eu composite cut across (a) andalong (b) the solidification direction.

Crystals prepared by vertical
Bridgman method

N. Kawaguchi, et al., Nucl. Instrum. Meth-A., 652, 209-211, (2011).

Chloride and iodide single crystals grown by
micro-pulling-down method(a)Other fluoride crystals(b)(c)
40,000 photon/neutron!!
LaBr3 crystals prepared in different
quartz ampoules: (a) normal,(b) conicaland (c) conical with necking.

The K6Li(YxCex)F5 ((a): x= 0.003, (b): x = 0.02)
single crystals grown by
the l-PD method.

The Sr7%:Ce15%:GdF3
specimen cut from thesingle crystal grown by
the CZ method (thescale is in mm).

The light yield of Eu 2%, Na 2%-doped LiCAF(bottom) reached 40,000 ph/n, which was about
30% higher than that of Eu:LiCAF (top).

Y. Furuya, et al.,Opti. Mater., 33(6), 855-881, (2011).

A. Fukabori, et al.,Cryst. Griwth, 318, 1175-1178 (2011),

T. Yanagida, et al.,Appli. Phys. express ,4(10), 106401, (2011) .

SrI2 crystals were studied by X-ray diffraction (XRD) that confirmed presence of
only SrI2 crystal phase, radioluminescence measurements showed Eu2+ emission
peak around 430 nm, under 137Cs γ-ray irradiation light yields were 48,000 ~ 70,000
ph/MeV, energy resolutions were 3.1 ~ 17% and decay times were 0.73 ~ 1.48 µs.
undoped RbPb2Cl5

Growth of RbPb2Cl5
crystal by m-PD

10

Yb0.5%:RbPb2Cl5

graphite crucible

crystal/melt interface

Support Industry by “Japan Science an d Technology Agency (JST)”with Tokuyama Co.

Nd0.5%:RbPb2Cl5

crystalThe samples were made by R. Kral
Grown RbPb2Cl5 single crystal was colorless and transparent, Nd:RbPb2Cl5
was blue and Yb:RbPb2Cl5 was colorless and opaque in its upper part due tosegregation of the Yb(III). XRD measurements showed presence of only
RbPb2Cl5 crystal phase.
11

Photo detectors
Recently, the technique of the powder
synthesis and sintering has beensignificantly improved!!

Having better chemical uniformity than single crystals.
 Being able to be produced with high concentration of dopant.

We investigate radiation reactions of our scintillators using a photomultiplier tube andsemi-conductor, and we have heat .

1, Photomultiplier Tube & Semi-conductor Befitted industrial production because of relatively large size andlow cost.
High uniformity and No impurity!!

Economical especially for high-melting point materials.

SEM

Transparent ceramics byKonoshima chemical Co., Ltd.

TEM

We use Ultra Bialkali
Photomultiplier tube (PMT)
R7600U as a standard PMT for
pulse height measurement.

Ultra Bialkali (UBA) R7600U

T. Yanagida et al.,Nucl. Instr. and Meth.
A 579 (2007) 23–26.
http://www.google.co.jp/url?sa=t&rct=j&q=UBA%2Bhamamatsu&source=web&cd=2&ved=0CCcQ
FjAB&url=http%3A%2F%2Fhamamatsu.com%2Fresources%2Fproducts%2Fetd%2Feng%2Fhtml%2F
pmt_003.html&ei=osSyToTxHc_xmAXhuLTEAw&usg=AFQjCNHNQsJKAb-JYXNkZCA4KlQBhOumJA

APD (avalanche photodiode)
Pr: LuAGT. Yanagida etal., IEEE Trans.
Nucl. Sci., 56(2009) 29552959.

Single crystal




APD

5 cm
MPPC andthe readout circuit

Yb3+ CTtransition

Yb 0.3 %: ~ 7%
Yb 15 %: ~ 10 %Yb 0.3 %: ~ 2.2 ns
Yb 15 %: ~ 1.4 ns

High quantum efficiency (up to ~80%)
Wide sensitive range(ex: 320 -1000 nm for S8664 HPK)MPPC (Multi-Pixel Photon Counter)
Measurement set up
for the APD and MPPCGood photon counting

2, Black box

Yb: YAGWe make 2 black boxes to measure the photoncounting with a MPPC, luminescence in other lab.

藤本 裕発表, 日本セラミックス協会2012年年会%T: 6% @900 nm

 A rapid consolidation rate and that is

UV
lamp

Eu: YAGappropriate for densification of variety ofceramics

Eu: LuAG Easily high density solidification.

Intensity / arb. unit

Intensity / arb. unit

die and punch.

Eu2+ 5d-4ftransition
250

200

300

300

UV
lamp

Starting
Powder

3, Measurement of Temperature Dependence

Eu 0.5%:YAG
Eu 0.5%:LuAG

Hostemission

 High reductive condition due to carbon%T: 12% @900 nm

Starting
Powder

350 400 450 500
Wavelength, λ / nm

400

Eu3+ 4f-4ftransition

 We investigated the temperaturedependence of the light output andthe decay time for several scintillator

杉山 誠発表,日本セラミックス協会
2012年年会

550

500
600
Wavelength, λ / nm

700

800

Intensity / a. u.

1600 sintered
1700 sintered
1800 sintered
1900 sintered

12

F+ + hν (251 nm) → F+*
F+* + kT → F2+ + eF2+ + e- → F+ + hν (390 nm)

350

400
450
500
Wavelength, λ / nm

550

S. Wakahara et al., Opt. mater., 2012 in press.

Thermostat chamber(Isuzu HPPC-40-20)

Calibration systemwith LED light
light output vs. temperature

13

Development of Shaped Piezoelectric crystals
Previous µ-PD furnace
for growth of shaped crystals• Large space for installation• High cost of manufacturing• High power consumption• Difficult technique of crystal growth

Crucible

Development of
new µ-PD furnace
for mass-productionof shaped crystals

Generator

Crystal Gallery

OXIDE～ Garnet type ～Furnace

Lu3Al5O12
Ce:Lu3Al5O12
Y3Al5O12

Y3Ga5O12

Gd3Lu2Ga3O12

New µ-PD furnace

Shaped crystals grown by new µ-PD furnace

Appearance

CNGS

CTGS

STGS

14

Ho:Lu3Al5O12

Tm:Lu3Al5O12

Ce:GAGG
Lu3Ga5O12

Nd:Lu3Al5O12

Tb3-xTmxAl5O12

Tb3-xYbxAl5O12

Tb2.5Yb0.5Sc2Al3O12

Tb2.2Sc2.8Al3O12

Tb3-xLuxAl5O12

Tb3-xSc2+xAl3O12

SNGS

LTG

Support Industry by “Ministry of Economy, Trade and Industry”

15

～ Perovskite type ～～ Langasite type ～YAlO3(Lu, Y)AlO3

Ca3NbGa3Si2O14 andSr3NbGa3Si2O14

Tm:YAlO3

Cr:YAlO3

TbAlO3～ Silicate type ～～ Sesquioxide type ～Sc2O3～ Spinel type ～

Lu2O3

Y2O3

～ Vanadate type ～Lu2SiO5

Gd2SiO5Y2SiO5～ Borate type ～YVO4, (Y, Lu)VO4, LuVO4

uncoped CaB2O4～ ZnO type ～Pr:Ca3(BO3)2

Ce:Ca3(BO3)2

YCa4O(BO3)3,

Pb:YCa4O(BO3)3,

Li6Y(BO3)3～ Apatite type ～ ～ Aluminate type～
LiAlO2
Ca8La2(PO4)6O2

16

Tm:Ca3(BO3)2

Li6Yb(BO3)3,
Li6Gd(BO3)3

undoped and Ce-doped :SrB2O4
17

Fluoride

Shaped Crystal

LiF/CaF2:Eu

Ca0.5%, Ce1%, 3%,
7%, 10% co-doped
Y0.5 Gd0.5F 3

Ce:LiCAF

Eu:LiCAF

Ce:YLF

Sr7%:Ce15%:GdF

Eu, Ce:LiSAF

OthersK6Li(Y1-xCex)F5((a): x = 0.003,(b): x = 0.02)(NaxCa1−2xLux)F2 (a: x=1/6, b: x=1/4, c: x=1/3 ) andc′:(NaxCa1−x−yLuy−0.05Ce0.05)F2+y−x (x=0.32,y=0.43)

18

19

Message from Foreign Participants

20

21

Message for 2011 annual report from Robert Kral
(Institute of Physics Academy of Sciences of the Czech Republic, Prague, Czech Republic)
In autumn 2011, I visited Prof. Yoshikawa’s laboratory for my
fourth time for 10 weeks. Actually, this stay was planed for March
2011, but unfortunately it had to be postponed to autumn 2011 due tothe devastating earthquake, which stroke Japan on March 11th. Whenthe earthquake stroke and the tsunami hit Miyagi area and otherprefectures, I was at that time in Vienna international airport waiting
for my flight to Narita airport and connecting flight to Sendai. First, I
could not believe that it was happening, because the day before I was
emailing with my colleague Dr. Pejchal from the laboratory. But after
I could not reach him or anyone else from the laboratory, I realizedthat the situation was very serious. And when I saw pictures of theflooded and burning Sendai airport, there was no possibility I could
continue in my trip. I canceled my flight to Japan and returned back to
Prague. At home I watched the news where I could see the real extensive and destructive power of theearthquake. It was a relief, when I received a message from Dr. Pejchal that he and everybody in thelaboratory were all right and no one was injured.
I returned to Sendai in autumn and I was amazed how quickly Sendai city, Miyagi area and all
Japan recovered from the disaster. During this stay, I proceeded in preparation of halide single crystals
within continuing collaboration of Dr. Nikl (Institute of Physics Academy of Sciences of the Czech
Republic) and Prof. Yoshikawa in their bilateral project ”New material conceptions for fast
scintillators” (2009-2012) from the Czech Science Foundation. Purpose of this project was to prepare
new halide materials by micro-pulling-down method and study their optical properties for scintillation
applications. We were focused on preparation of rubidium lead chloride (RbPb2Cl5) single crystals
pure and doped with RE elements such as Nd(III), Yb(III), Pr(III) and Dy(III). All starting materials
were synthesized and purified in our Laboratory of Crystal Growth at the Institute of Physics AS CR,
Prague, Czech Republic.
This stay was also interesting that I could witness a successful moving of Prof. Yoshikawa’slaboratory from its previous place to the new laboratory at the Institute of Material Research (IMR),
Tohoku University. I am always looking forward to visit and to work in Prof. Yoshikawa’s laboratory,
there is a very pleasant atmosphere and support from all the laboratory members whenever I needed
help. Each stay, I could learn something new and I could improve my skills in crystal growth.

Message for 2011 annual report from Jan Pejchal
After almost 3 years of staying in this research group, the last year wasaffected by the big earthquake on March 11, 2011. A week after thedisaster, I returned to my home country for a while, because my house
was affected by later aftershock and I was not sure if it was safe to staythere. In April, when I returned back to Sendai, I was really impressed
how the Japanese people could cope with such a big disaster. Japanesenation is very strong and can set a good example to the others. As mystay was planned until the middle of May, I was trying to continue
some experiments. Of course the research in the lab was not running in
the full extent, as some of the equipment was damaged due to theearthquake. On May 14th, exactly after 3 years of stay, I returned backto Czech Republic. I would never think that I would give farewell toJapan in this way.
There I continued my research on luminescence of scintillators, still keeping close contacts with Sendai.
I had an opportunity to meet the members of Yoshikawa lab in various international conferences, such as
International conference on scintillation materials SCINT2011 or International workshop on crystal
growth IWCGT5, both held in Germany.
On 1st October 2011, I came to Sendai again for 2 months in the framework of planned business trip.
However, I was very happy when Prof. Yoshikawa offered me a position for half year. I gladly accepted,
as it was again a great opportunity for me to improve my knowledge and skills in crystal growth here inthis lab and share my experience on luminescence studies.
In the end of the year a big moving of the whole laboratory from IMRAM to the IMR building was
performed. At that time, almost all the equipment was recovered from the damage caused by theearthquake. I really appreciate the effort and good job of all the members of Yoshikawa laboratory.
Another good news was that I could prolong my stay one year more. So I can still continue with researchhere and more profound my knowledge and experience in this successful research group, while enjoying
Japanese life and culture. I hope our cooperation will still continue.

Sincerely Yours

Jan Pejchal

22

23

Members

24

25

Members of Yoshikawa Lab

Second grades Ph.D student
Y. Fujimoto

Third grades Ph.D student
A. FukaboriFirst grades Mastercourse student
S. Wakahara

Second grades Mastercourse student
M. Sugiyama

Professor
A. Yoshikawa

Technical Counsellor
H. Uemura

Secretary
A. Imai

26

Engineer
K. Toguchi

Research AssistantProfessor
Y. Yokota

Post Doctral Fellow
S. Kurosawa

Researcher
A. Yamaji

Associate Professor
T. Yanagida

Researcher
D. Totsuka

Researcher
N. Kawaguchi

Researcher
K. Kamada

Researcher
M.SatoResearcher
K. Fukuda

Post Doctral Fellow
J. Peichal

Post Doctral Fellow
Y. Futami

Research Fellow
H. Ogino27

2011 年度 吉川研究室
Members (2011 academic year)

4. 1. 2011
Professor
Dr.

Akira Yoshikawa

Associate Professor
Dr.

Takayuki Yanagida

Research Assistant Professor
Dr.

Yuui Yokota

Adviser

吉川 彰

NICHe 兼任

准教授
柳田 健之

Prof

Masae Kikuchi
Touetsu Shishido

Post Doctral Fellow

横田 有為

Dr.

Shunsuke Kurosawa

黒澤 俊介

Dr.

Yoshisuke Futami

二見 能資

深堀 明博

D3

Yutaka Fujimoto

藤本 裕

D2

Makoto Sugiyama

杉山 誠

M2

Shingo Wakahara

若原 慎吾

M1

Czech

民間等共同研究員
Kentaro Fukuda

福田 健太郎株式会社トクヤマ／Tokuyama Co., Ltd.

Noriaki Kawaguchi

河口 範明

株式会社トクヤマ／Tokuyama Co., Ltd.

Kei Kamada

鎌田 圭

古河機械金属株式会社／
Furukawa Co., Ltd.

Daisuke Totsuka

戸塚 大輔

日本結晶光学株式会社／
Nihon kesshokougaku Co., Ltd.

Masato Sato佐藤 真人

TDK 株式会社
TDK Co., Ltd.

Visiting Professors/Researchers

客員教授

Prof. Georges Boulon

ジョージ ブーロン

France上村 博

Prof. Martin Nikl

マーチン ニクル

Czech Republic

秘書

Dr.

ヴラディミール カチューリッヒン

Russia

技術参事

Akiko Imai

今井 亜希子Keiko Toguchi

戸口 景子

Researcher

Dr.

博士研究員
ヤン ペジャール

Secretaries

Dr.

宍戸 統悦

Jan Pejchal

Hiroshi Uemura

Akihiro Fukabori

Researchers

菊地 昌枝

Dr.

Technical Counsellor

大学院生

助教

顧問
Prof

VladimirV.Kochurikhin

研究員
Akihiro Yamaji

28

Graduate Students

教授

山路 晃広
29

Research Life30

31

I joined the Yoshikawa laboratory one year ago and I am
studying the scintillation materials. When I joined, we weremoving to IMR and because of the big earthquake before, we
had to organize and repair a lot of equipment. So it was hardtime for me in the first month. At present, however, I am able
to enjoy my research life attending many conferences (bothof domestic and international) and writing some scientificpapers. I studied the crystal growth and scintillation
properties of LiSrAlF6 host crystal for thermal neutron
detector. In order to increase the light output of Eu or Ce
doped crystal, I grew the alkali metal co-doped ones
successfully by Micro-Pulling Down method. Additionally, I
studied the phosphorescent properties of ceramics as subtheme. Nobody in our laboratory has researched thephosphorescent materials, so it was interesting andchallenging study for me. I also enjoyed some events such as
cherry-blossom, beer party in IMR, ski trip and so on.
All of the members in this laboratory are kind and help me
when I need assistance, therefore I really appreciate it and I’ll
do my best in studies and work for this laboratory until mygraduation.

Prizes and Awards

Shingo Wakahara
(M1)

32

33

受賞等
Prizes and Awards
1. 横田 有為田中貴金属グループ 「貴金属に関わる研究助成金」 MMS 賞 (2011 年 5 月 31 日)
2. 杉山 誠"Nd 添加 LuAG 単結晶を用いた X 線撮像検出器の試作" 放射線夏の学校 優秀ポス
ター賞 (2011 年 8 月 3 日)
3. 黒澤 俊介
"真空紫外線発光シンチレータとガス検出器による 2 次元高計数率検出器の開発" 放射線夏の学校 最優秀ポスター賞 (2011 年 8 月 3 日)
4. 藤本 裕第 31 回応用物理学会講演奨励賞（2011 年 11 月 15 日）
5. 杉山 誠東北大学工学研究科長賞（2012 年 3 月 21 日）

34

35

List of Collaborative Research

3637Visits by International Collaborators 2011
Affiliation
General Physics InstituteResearcher

Research Theme

Dr. V. Kochurikhin

Growth of bulk single crystals and automatic(Russia)

diameter control of Czochralski growth

CB Lyon1 Univ.

Pr. G. Boulon

Laser and nonlinear materials and their(France)Dr. T. Epicier

spectroscopic properties

Institute of Physics ASCR

Dr. M. Nikl

Characterization of various scintillator(Czech Republic)

Mr. R. Králmaterials

TPS corporation
North –Caucasus State
Technical Univ. (Russia)
Sungkyunkwan Univ.
(Korea)Czochralski method

Pr. B. Sinelnikov

Growth of bulk single crystals
Growth of bulk single crystals by

Pr. Dae Ho Yoon

micro-pulling-down method

Seminar at Yoshikawa Laboratory 2011
Date
March 738

Affiliation
Institute of Physics ASCR
(Czech Republic)

Affiliation

Researcher

Period of stayInstitute of Physics ASCR
(Czech Republic)

Dr. Pejchal

May 9 - October 14(except August 25 - 31)

Pennsylvania State University
Materials Research Institute(U.S.A)

Pr. Yoshikawa,Dr. Yokota

June 25 - July 6

Growth of bulk single crystals by

Mr. Won Gun Lee(Korea)Visits to International Collaborators 2011

Speaker

Title of speechTechnische Universitat Munchen
Pr. Yoshikawa(Germany)

July 25 - 29

DESY in Hamburg(Germany)

August 25 - 31

Institute of Physics ASCR
(Czech Republic)

Dr. Pejchal
Pr. Yoshikawa,
Assoc. Pr. Yanagida,
Dr. Yokota, Dr. Kurosawa
Mr. Yamaji, Mr. Wakahara

September 10 - 20

LiCaAlF6 – based Scintillators.
Dr. M. Nikl

Luminescence and Scintillation
Mechanisms & Defects

39

Research Funds

40

41

平成 23 年度 研究資金
Research funds (2011 fiscal year)【内閣府 （研究管理機関：日本学術振興会）】

Tohoku Bureau of Economy, Trade and Industry
The Ministry of Economy, Trade and Industry
1. 戦略的基盤技術高度化支援事業(サポイン)

The Cabinet Office (In charge: Japan Society for the Promotion of Science)

Funding Program for Strategic Support Industry

1. 最先端・次世代研究開発支援プログラム「ランガサイト型圧電結晶の形状制御単結晶作製装置及び作製技術の開発」“Developments of growth furnace and technique on shape-controlled langasite-type

Funding Program for Next Generation World-Leading Researchers (NEXT Program)「次世代癌治療用近赤外線発光シンチレータの系統的研究開発」"Systematic study of infrared photon emitting scintillators for cancer therapy”
研究代表者：吉川 彰
Project Leader: A. Yoshikawa
メンバー：柳田 健之、横田 有為、藤本 裕、山路 晃広、杉山 誠、戸塚 大輔
Member: T. Yanagida, Y. Yokota, Y. Fujimoto, A. Yamaji, M. Sugiyama, D. Totsuka
150,080,000 yen/3years, 2011.2 ~ 2013.3( 90,744,000 yen in 2011FY)

42【経済産業省－東北経済産業局】

piezoelectric single crystals”
プロジェクト副代表者：吉川 彰
Project Sub Leader: A. Yoshikawa (NICHe)
メンバー：横田 有為、二見 能資、佐藤 真人
Member: Y. Yokota, Y. Futami, M. Sato
Total: 98,080,000 yen/1year, 2011.2 ~ 2011.12( 17,400,000 yen for our team)「難加工性機能性合金の形状制御結晶育成技術の開発」“Developments of ｆunctional metallic products by shape-controlled growthtechniques”
プロジェクト副代表者：吉川 彰
Project Sub Leader: A. Yoshikawa (NICHe)
メンバー：横田 有為、二見 能資
Member: Y. Yokota, Y. Futami
Total: 69,830,000 yen/2years, 2012.1 ~ 2013.3( 19,580,000 yen for our team)43

【JSTプロジェクト】【文部科学省科学研究費補助金】

Japan Science and Technology Agency

Ministry of Education, Culture, Sports, Science and Technology

1. JST研究成果最適展開支援事業（A-STEP）【FS】探索タイプ

日本学術振興会 Japan Society for the Promotion of Science

JST Adaptable and seamless technology transfer program through target-driven R&D

科学研究費助成 Grants-in-Aid for Scientific Research「電荷移動遷移を用いたTOF-PET用シンチレータの開発」

1.

“Development of new scintillators for TOF-PET based on Charge transfer andCharge transition phenomena”
プロジェクト代表者：柳田 健之
1,300,000 yen/1year, 2011.8-2012.3

若手研究（A）Grants-in-Aid for young scientists (A)研究代表者: 吉川 彰
Project Leader: A. Yoshikawa
5,000,000 yen/year, 2011.4-2012.3

Project Leader: T. Yanagida(NICHe)
研究代表者: 柳田 健之
5,600,000 yen/year, 2011.4-2012.3

Project Leader: T. Yanagida「形状制御Pr:LuAGシンチレータ単結晶育成技術の開発」“Development of shape-controlled crystal growth of Pr:LuAG scintillator”
プロジェクト代表者：横田 有為
Project Leader: Y. Yokota

2.

若手研究（B）Grants-in-Aid for young scientists (B)研究代表者: 横田 有為
Project Leader: Y. Yokota
1,500,000 yen/year, 2011.4-2012.3

3.

挑戦的萌芽
Challenging Exploratory Research
研究代表者: 柳田 健之
Project Leader: T. Yanagida
1,200,000 yen/year, 2011.4-2012.3

4.

特別研究員奨励費
研究代表者: 藤本 裕
700,000 yen/year, 2011.4-2012.3

1,300,000 yen/1year, 2011.8-2012.3「Pr 添加 YAP シンチレータの高特性化および大口径化研究」“Study on Pr:YAP scintillating crystals of greater diameter and improved
performance”
プロジェクト代表者：二見 能資
Project Leader: Y. Futami
700,000 yen/1year, 2011.12-2012.3
2. JST産学イノベーション加速事業【先端計測分析技術・機器開発】
要素技術開発“Development of Systems and Technology for Advanced Measurement and Analysis
Technology”“Development Program for Advanced Measurement and Analysis (Program-T)”

研究代表者: 黒澤 俊介
800,000 yen/year, 2011.4-2011.3

Project Leader: Y. Fujimoto

Project Leader: S. Kurosawa「熱-熱外中性子用高効率シンチレータ検出器の開発」（名古屋大学からの再委託研究）“Development of highly efficient scintillator for thermal-epithermal neutrons”
プロジェクト副代表者：柳田 健之 Project Sub Leader: T. Yanagida(NICHe)
Total: 52,000,000 yen/3years, 2010.9-2014.3( 5,820,000 yen for our team)4445

平成 23 年度申請特許

List of patents【企業・財団・個人からの受託・共同研究，寄付金及び小型プロジェクト】
Funds from industry, Foundations, personal donation and small project
1. 株式会社トクヤマ
Tokuyama Corporation
2. 古河機械金属株式会社

1. シンチレーター及び放射線検出器
吉川

彰、柳田

健之、横田

有為、福田

健太郎、河口範明(Akira Yoshikawa, Takayuki Yanagida, Yuui Yokota, Kentaro Fukuda, Noriaki Kawaguchi)
2. フッ化物単結晶、発光素子及びシンチレーター

Furukawa Co. Ltd.
3. TDK 株式会社
TDK Corporation

吉川

彰、柳田

福田

健太郎

有為、藤本

裕、石津

澄人、河口

範明、

(Akira Yoshikawa, Takayuki Yanagida, Yuui Yokota, Yutaka Fujimoto, Sumito Ishizu,
Noriaki Kawaguchi, Kentaro Fukuda)

4. 日本結晶光学株式会社
Nihon Kessho Kogaku Co.Ltd健之、横田

3. Ｘ線シンチレーター用材料

5. 三菱ガス化学株式会社
Mitsubishi Gas Chemical Co.Ltd
6. キヤノン株式会社
Canon Inc.
7. 田中貴金属インターナショナル株式会社

吉川

彰、柳田

健之、藤本

裕、杉山

誠、戸塚

大輔

(Akira Yoshikawa, Takayuki Yanagida, Yutaka Fujimoto, Makoto Sugiyama, Daisuke
Totsuka)
4. 放射線検出器

Tanaka Kikinzoku International Co.Ltd

吉川

彰、柳田

8. (有)ワールドエンジニアリングシステム

伊藤

繁記

健之、鎌田

圭、佐藤

浩樹、堤

浩輔、遠藤

貴範、

(Akira Yoshikawa, Takayuki Yanagida, Kei Kamada, Hiroki Sato, Kousuke Tsutsumi,

World Engineering System Ltd

Takanori Endo, Shigeki Ito)

9. 公益財団法人 村田学術振興財団
The Murata Science Foundation

他

１０

件

(

合計

１４

件 )

10. 大阪大学レーザーエネルギー学研究センター 共同研究
Collaboration program with Institute of Laser Engineering, Osaka Univ.
「中性子検出器用新規シンチレータ結晶の開発」

46

47

学会、学内における役員・委員等

Committees of academic societies and conferences
吉川 彰
Dr. Akira YOSHIKAWA, Professor
日本結晶成長学会
Japanese Association for Crystal Growth Cooperation

理事（新技術・新材料分科会担当）
Trustee (responsible for
new technology and newmaterials branch)
編集委員
Member of the editorial
staff

日本学術振興会第 161 委員会
No. 161 committee, Japan Society for the Promotion of
Science

運営委員
Manager

応用物理学会
The Japan Society of Applied Physics

プログラム編集委員
Programming Committee

第 7 回発光・受光及び放射線変換素子に関する国際学会 科学諮問委員
The 7th International Conference on Luminescent Detectors Scientific Advisory
and Transformers of Ionizing Radiation (LUMDETR 2009)
Committee

48

Europhysical Conference of Defects in Insulating Materials(EURODIM 2010)

国際諮問委員International Advisory
Committee

International Conference on Defects in Insulating Materials(ICDIM 2012)

国際諮問委員International Advisory
Committee

List of Presentations

49

A. International conference and symposia
国際学会

6. Marilou CADATAL-RADUBAN, Toshihiko SHIMIZU, Kohei YAMANOI, Kohei
TAKEDA, Kohei SAKAI, Minh HONG PHAM, Tomoharu NAKAZATO, Nobuhiko
SARUKURA, Kentaro FUKUDA, Toshihisa SUYAMA, Takayuki YANAGIDA, Akira

1. Akira Yoshikawa

YOSHIKAWA, Fumio SAITO"Development of novel rare earth doped fluoride and oxide scintillators, and 2 dimensional"Micro-pulling Down Method-grown Er3+:licaalf6 as Prospective Vacuum Ultraviolet

imaging "Laser Material "The Second International Conference on RARE EARTH MATERIALS (REMAT),The 5th Asian Conference on Crystal Growth and Crystal Technology (CGCT-5),

2011.6.13-15, Wroclaw, POLAND(Invited)(2011)2011.6.27-7.1, Suntec, Singapore (2011)

2. J. Pejchal, Y. Fujimoto, V. Chani, T. Yanagida, Y. Yokota, A. Yoshikawa, M. Nikl, A.

7. Yuki MINAMI, Mizuki TSUBOI, Marilou CADATAL-RADUBAN, Toshihiko SHIMIZU,

Beitlerova

Masahiro KOUNO, Kohei YAMANOI, Minh HONG PHAM, Elmer ESTACIO, Tomoharu"Modications of micro-pulling-down method for the growth of selected Li-containing

NAKAZATO, Nobuhiko SARUKURA, Toshihisa SUYAMA, Kentaro FUKUDA, Akira

crystals for neutron scintillator and VUV scintillation crystals. "YOSHIKAWA, Fumio SAITO

5th International Workshop on Crystal Growth Technology (IWCGT-5), 2011. 6.26- 6.30,"Vacuum Ultraviolet Up-conversion Fluorescence from Nd3+-doped Laf3 and Lulif4

Berlin, Germany(2011)

Excited with the Third Harmonics of a Ti:sapphire Laser "3. A. Yoshikawa, T. Yanagida, N. Kawaguchi, Y. Fujimoto, Y. Yokota, K. Fukuda, K.
Watanabe, A. Yamazaki, A. Uritani, T. Iguchi, M. Nikl
"Crystal growth and scintillation properties of 6LiCAF single crystal, as a candidate forneutron detection alternatives to 3He "The 5th Asian Conference on Crystal Growth and Crystal Technology (CGCT-5),
2011.6.27-7.1, Suntec, Singapore (2011)
8. Kozue WATANABE, Yasunobu ARIKAWA, Kohei YAMANOI, Marilou
CADATAL-RADUBAN, Takahiro NAGAI, Masahiro KOUNO, Kohei SAKAI, Tomoharu

The 16th International Conference on Luminescence and Optical Spectroscopy of

NAKAZATO, Toshihiko SHIMIZU, Nobuhiko SARUKURA, Mitsuo NAKAI, Takayoshi

Condensed Matter (ICL'11), 2011.6.26- 7. 1, Michigan, USA(Invited)(2011)

NORIMATSU, Hiroshi AZECHI, Akira YOSHIKAWA, Takahiro MURATA, Shigeru

4. Martin Nikl, Jiri A. Mares, Akira Yoshikawa, Hiraku Ogino, Karel Nejezchleb, Karel
Blazek, Anna Vedda"Ten Years Of The LuAG-based Scintillators Development. State Of Art And Prospects. "The 16th International Conference on Luminescence and Optical Spectroscopy ofCondensed Matter (ICL'11), 2011.6.26- 7. 1, Michigan, USA(Invited)(2011)
5. Akira YOSHIKAWA, Yuui YOKOTA, Noriaki KAWAGUCHI, Kentaro FUKUDA,
Takayuki YANAGIDA, Yutaka FUJIMOTO, Ken-ichi WATANABE, Atsushi
YAMAZAKI, Akira URITANI, Tetuo IGUCHI"Czochralski Growth of RE Doped LiCAF and Their Scintillation Properties as a Candidatefor 3He Alternatives "The 5th Asian Conference on Crystal Growth and Crystal Technology (CGCT-5),
2011.6.27-7.1, Suntec, Singapore (Invited)(2011)

FUJINO, Hideki YOSHIDA, Nobuhiko IZUMI, Nakahiro SATOH, Hirofumi KAN"Pr or Ce-doped, Fast-response and Low-afterglow Cross-section-enhanced Scintillator with
6Li for Down-scattered Neutron Originated from Laser Fusion "The 5th Asian Conference on Crystal Growth and Crystal Technology (CGCT-5),
2011.6.27-7.1, Suntec, Singapore (2011)
9. Rayko SIMURA, Shohei KAWAI, Takayuki YANAGIDA, Takamasa SUGAWARA,
Kazumasa SUGIYAMA, Akira YOSHIKAWA, Toetsu SHISHIDO"Growth and Optical Properties of Ce-doped Strontium Yttorium Double Borate "The 5th Asian Conference on Crystal Growth and Crystal Technology (CGCT-5),
2011.6.27-7.1, Suntec, Singapore (2011)
10. Rayko SIMURA, Tatsushi YAGI, Kazumasa SUGIYAMA, Takayuki YANAGIDA, Yuji
KAGAMITANI, Akira YOSHIKAWA"Growth and Optical Properties of Ce-doped (Ba or Sr)3Gd(BO3)3 "The 5th Asian Conference on Crystal Growth and Crystal Technology (CGCT-5),
2011.6.27-7.1, Suntec, Singapore (2011)50

51

11. Akihiro YAMAJI, Takayuki YANAGIDA, Yuui YOKOTA, Kei KAMADA, Akira

17. Akira YOSHIKAWA, Yutaka FUJIMOTO, Takayuki YANAGIDA, Yuui YOKOTA,YOSHIKAWA

Noriaki KAWAGUCHI, Kentaro FUKUDA, Daisuke TOTSUKA, Kenichi WATANABE,"Study on the Relation Between Crystallinity and Scintillation Properties in Pr:luag Single

Atsushi YAMAZAKI

Crystals ""Crystal Growth and Scintillation Properties of Calcium Metaborate "The 5th Asian Conference on Crystal Growth and Crystal Technology (CGCT-5),

The 5th Asian Conference on Crystal Growth and Crystal Technology (CGCT-5),

2011.6.27-7.1, Suntec, Singapore (2011)2011.6.27-7.1, Suntec, Singapore (2011)

12. Makoto SUGIYAMA, Yutaka FUJIMOTO, Takayuki YANAGIDA, Yuui YOKOTA, Akira

18. Akira Yoshikawa

YOSHIKAWA"Scintillators for PET and Medical Gamma-Ray Imaging ""Growth and Scintillation Properties of Nd-doped Lu3Al5O12 Single Crystals by

Advanced Summer School in Radiation Detection (SSRDM 2011), 2011. 7.24- 7.30,

Czochralski and Micro-Pulling-Down Methods "M?nchen, Germany (Invited)(2011)

The 5th Asian Conference on Crystal Growth and Crystal Technology (CGCT-5),
2011.6.27-7.1, Suntec, Singapore (2011)
13. Makoto SUGIYAMA, Yutaka FUJIMOTO, Takayuki YANAGIDA, Daisuke TOTSUKA,

19. Akira Yoshikawa, Yuui Yokota, Masato Sato, Kazushige Tota, Yoshisuke Futami, Akihiro
Yamaji, Takayuki Yanagida3 and Ko Onodera"SHAPED CRYSTAL GROWTH OF LANGASITE‐TYPE PIEZOELECTRIC SINGLE

Yuui YOKOTA1, Akira YOSHIKAWA

CRYSTALS AND THEIR PHYSICAL PROPERTIES ""Crystal Growth and Luminescence Properties of Cr-doped YAlO3 Single Crystals "The 20th IEEE International Symposium on Applications of Ferroelectrics (ISAF2011),

The 5th Asian Conference on Crystal Growth and Crystal Technology (CGCT-5),

2011.7.24-27, Vancouver, Canada (Invited)(2011)2011.6.27-7.1, Suntec, Singapore (2011)
14. Yuui YOKOTA, Masato SATO, Kazushige TOTA, Ko ONODERA, Akihiro YAMAJI,

20. Yuui Yokota, Masato Sato, Kazushige Tota, Yoshisuke Futami, Akihiro Yamaji, Takayuki
Yanagida, Ko Onodera and Akira Yoshikawa

Takayuki YANAGIDA, Akira YOSHIKAWA"SHAPE‐CONTROLLED CRYSTAL GROWTH OF Sr3NbGa3Si2O14 AND"Development of Crystal Growth on Shape-controlled Ca3TaGa3Si2O14 Single Crystals by

Sr3TaGa3Si2O14 PIEZOELECTRIC SINGLE CRYSTALS BY

Micro-pulling-down Method "MICRO‐PULLING‐DOWN METHOD "The 5th Asian Conference on Crystal Growth and Crystal Technology (CGCT-5),

The 20th IEEE International Symposium on Applications of Ferroelectrics (ISAF2011),

2011.6.27-7.1, Suntec, Singapore (2011)2011.7.24-27, Vancouver, Canada (Invited)(2011)

15. Yuui YOKOTA, Akihiro YAMAJI, Takayuki YANAGIDA, Noriaki KAWAGUCHI,

21. Y Futami, M Sato, Y Yokota, T Yanagida, Y Fujimoto, N Kawaguchi, K Toota, K Onodera

Kentaro FUKUDA, Akira YOSHIKAWA

and A Yoshikawa"The Control of Mean Ionic Radius at Y Site by Lu Co-doping for Ce:LiYF4 Single"Crystal growth and alpha-ray responses of Ca3NbGa3Si2O14 "Crystals "The 18th American Conference on Crystal Growth and Epitaxy (ACCGE-18),

The 5th Asian Conference on Crystal Growth and Crystal Technology (CGCT-5),

2011.7.31-8.5, Monterey, California(2011)2011.6.27-7.1, Suntec, Singapore (2011)
16. Akihiro YAMAJI, Takayuki YANAGIDA, Yuui YOKOTA, Makoto SUGIYAMA, Akira

22. Y Futami, M Sato, Y Yokota, T Yanagida, K Toota, K Onodera and A Yoshikawa"Annealing effect on crystal and optical property of Ca3NbGa3Si2O14 "YOSHIKAWA

The 18th American Conference on Crystal Growth and Epitaxy (ACCGE-18),"Growth of Undoped and Tm-doped K2naluf6 Single Crystal by Czochralski Method and2011.7.31-8.5, Monterey, California(2011)

the Scintillation Properties "The 5th Asian Conference on Crystal Growth and Crystal Technology (CGCT-5),
2011.6.27-7.1, Suntec, Singapore (2011)52

53

23. A Yamaji, N Kawaguchi, Y Fujimoto, Y Yokota, T Yanagida, A Yoshikawa

29. Takahiro Murata, K. Watanabe, Y. Arikawa, K. Yamanoi, M. Cadatal-Raduban, T. Nagai,"Crystal growth and dopant segregation of Ce:LiSrAlF6 and Eu:LiSrAlF6 crystals with high

M. Kouno, K. Sakai, T. Nazakato, T. Shimizu, N. Sarukura, M. Nakai, T. Norimatsu, H.

dopant concentrations "Azechi, A. Yoshikawa, S. Fujino, H. Yoshida, N. Izumi, N. Satoh, H. Kan

The 18th American Conference on Crystal Growth and Epitaxy (ACCGE-18),"Fast-Response and Low-Afterglow Pr- or Ce-Doped Scintillator with 6Li for Laser

2011.7.31-8.5, Monterey, California(2011)

Fusion-Originated Down-Scattered Neutron Detection "24. M Sugiyama, Y Yokota, Y Fujimoto, T Yanagida, A Yoshikawa"Dopant segregation in rare earth doped lutetium aluminum garnet single crystals grown by
the micro-pulling down method "11th International Conference on Inorganic Scintillators and their Applications (SCINT
2011), 2011. 9.12-16, Giessen, Germany(2011)
30. Akira Yoshikawa, Takayuki Yanagida, Yuui Yokota, Makoto Sugiyama, Shingo Wakahara,

The 18th American Conference on Crystal Growth and Epitaxy (ACCGE-18),

Yutaka Fujimoto, Akihiro Yamaji, Syunsuke Kurosawa, Noriaki Kawaguchi, Kentaro

2011.7.31-8.5, Monterey, California(2011)

Fukuda, Kei Kamada, Daisuke Totsuka, Hideki Yagi, Tkagimi Yanagitani, Yoshisuke

25. Y Yokota, T Yanagida, A Yamaji, N Kawaguchi, F Kentaro, Y Futami, A Yoshikawa"Effects of ionic radius control at Y site by Sc doping on crystal growth and physicalproperties for Ce:LiYF4 single crystals "The 18th American Conference on Crystal Growth and Epitaxy (ACCGE-18),
2011.7.31-8.5, Monterey, California(2011)
26. Y Yokota, M Sato,Y Futami, K Tota, A Yamaji,T Yanagida, K Onodera, A Yoshikawa,"Crystal growth and physical properties of shape-controlled La3Ga5.5Ta0.5O14 single
crystal by micro-pulling-down method "The 18th American Conference on Crystal Growth and Epitaxy (ACCGE-18),
2011.7.31-8.5, Monterey, California(2011)
27. T. Shishido, K. Yubuta, A. Nomura, T. Mori, A. Yoshikawa, K. Kudou, S. Okada, Y.
Kawazoe,"Formation and Hardness of Perovskite-Type Solid Solution La1-xScxRh3B "International Symposium on Boron, Borides and Related Materials (ISBB 2011), 2011.
9.11-17, Istanbul, Turkey(2011)
28. Martin Nikl, J. A. Mares, A. Yoshikawa, H. Ogino, K. Nejezchleb, K. Blazek, A. Vedda"Ten Years of the LuAG-based Scintillator Development ? State of the Art and Prospects "11th International Conference on Inorganic Scintillators and their Applications (SCINT
2011), 2011. 9.12-16, Giessen, Germany(Invited)(2011)

Futami, Kunio Yubuta, Toetsu Shishido, Akihikjo Ito, Tkashi Goto, Martin Nikl
"Modern Technology of Crystal Growth and Transparent Ceramics for Scintillator Materials
and Related Crystal Chemistry "11th International Conference on Inorganic Scintillators and their Applications (SCINT
2011), 2011. 9.12-16, Giessen, Germany(Invited)(2011)
31. Kei Kamada, T. Yanagida, T. Endo, K. Tsutumi, Y. Usuki, M. Nikl, Y. Fujimoto, A.
Fukabori, A. Yoshikawa"Crystal Growth and Scintillation Properties of Ce-Doped Gd3(Ga, Al)5O12 Single Crystal"
11th International Conference on Inorganic Scintillators and their Applications (SCINT
2011), 2011. 9.12-16, Giessen, Germany(2011)
32. T. Yanagida, Y. Fujimoto, N. Kawaguchi, K. Kamada, D. Totsuka, Y. Tokota, A.
Yoshikawa"Scintillation Decay Time of Ce3+, Pr3+ and Nd3+ "11th International Conference on Inorganic Scintillators and their Applications (SCINT
2011), 2011. 9.12-16, Giessen, Germany(2011)
33. T. Yanagida, K. Fukuda, Y. Fujimoto, N. Kawaguchi, A. Yamazaki, K. Watanabe, Y.
Tokota, A. Yoshikawa"Ce and Eu Activated 6LiF-SrxCa1-xF2 Eutectic Scintillator for Neutron Detection "11th International Conference on Inorganic Scintillators and their Applications (SCINT
2011), 2011. 9.12-16, Giessen, Germany(2011)34. Y. Fujimoto, K. Kamada, T. Yanagida, Y. Tokota, N. Kawaguchi, K. Fukuda, D. Totsuka,
K. Watanabe, A. Yamazaki, A. Yoshikawa"Lithium Aluminate Crystals as Scintillator for Thermal Neutron Detection "11th International Conference on Inorganic Scintillators and their Applications (SCINT
2011), 2011. 9.12-16, Giessen, Germany(2011)54

55

35. D. Totsuka, T. Yanagida, K. Fukuda, N. Kawaguchi, Y. Fujimoto, Y. Tokota, A. Yoshikawa"Performance Test of PIN Photodiode Line Scanner for Thermal Neutron "Fukabori, A. Yoshikawa

11th International Conference on Inorganic Scintillators and their Applications (SCINT"Growth and Scintillation Properties of Pr doped (Gd,Y)3(Ga,Al)5O12 Single Crystals "2011), 2011. 9.12-16, Giessen, Germany(2011)

11th International Conference on Inorganic Scintillators and their Applications (SCINT

36. H. Takahashi, M. Yonetani, M. Matsuoka, T. Mizuno, Y. Fukazawa, T. Yanagida, Y.
Fujimoto, Y. Yokota, A. Yoshikawa, N. Kawaguchi, S. Ishizu, K. Fukuda, T. Suyama

2011), 2011. 9.12-16, Giessen, Germany(2011)
43. K. Kamada, T. Yanagida, T. Endo, K. Tsutumi, Y. Usuki, M. Nikl, Y. Fujimoto, A.

"Temperature Dependence of LiCaAlF6 and LiYF4 Neutron Scintillators "Fukabori, A. Yoshikawa

11th International Conference on Inorganic Scintillators and their Applications (SCINT"Improvements of Scintillation Properties by Ga and Y Substitution in Pr Doped2011), 2011. 9.12-16, Giessen, Germany(2011)

Lu3Al5O12 Scintillator "37. A. Yoshikawa, T. Yanagida, Y. Fujimoto, S. Kurosawa, M. Sugiyama, S. Wakahara, Y.
Yokota, Y. Futami, M. Kikuchi, M. Miyamoto, H. Sekiwa, M. Nikl
"LPE Growth and Scintillation Properties of (Zn,Mg)O Single Crystalline Film "11th International Conference on Inorganic Scintillators and their Applications (SCINT
2011), 2011. 9.12-16, Giessen, Germany(2011)
44. M. Sugiyama, Y. Fujimoto, T. Yanagida, D. Totsuka, Y.Yokota, A. Yoshikawa

11th International Conference on Inorganic Scintillators and their Applications (SCINT"Imaging Test of the Czochralski Grown Nd-Doped Lu3Al5O12 Based X-Ray Monitor "2011), 2011. 9.12-16, Giessen, Germany(2011)

11th International Conference on Inorganic Scintillators and their Applications (SCINT

38. S. Kurosawa, N. Higashi, T. Yanagida, S. Iwaki, Y.Yokota, H. Kubo, T. Tanimori, A.
Yoshikawa2011), 2011. 9.12-16, Giessen, Germany(2011)
45. M. Sugiyama, Y. Fujimoto, T. Yanagida, D. Totsuka, Y.Yokota, A. Yoshikawa"Ce Concentration Dependence of Optical and Scintillation Properties for Ce doped GSO"Growth and Scintillation Properties of Ho-Doped Lutetium Aluminum Garnet Single

and GSOZ Single Crystals "Crystals "11th International Conference on Inorganic Scintillators and their Applications (SCINT

11th International Conference on Inorganic Scintillators and their Applications (SCINT

2011), 2011. 9.12-16, Giessen, Germany(2011)2011), 2011. 9.12-16, Giessen, Germany(2011)

39. S. Kurosawa, D. Totsuka, T. Yanagida, Y.Yokota, A. Yoshikawa

46. A. Yamaji, T. Yanagida, Y.Yokota, K. Kamada, A. Yoshikawa"Crystal Growth of Ho:YAP Scintillator and Its Properties ""Quantitive Research for the Crystallinity in Pr doped Lu3Al5O12 "11th International Conference on Inorganic Scintillators and their Applications (SCINT

11th International Conference on Inorganic Scintillators and their Applications (SCINT

2011), 2011. 9.12-16, Giessen, Germany(2011)2011), 2011. 9.12-16, Giessen, Germany(2011)40. D. Totsuka, T. Yanagida, M. Sugiyama, Y. Fujimoto Y.Yokota, A. Yoshikawa

47. T. Yanagida, Y. Fujimoto, H. Yagi, T. Yanagitani Y.Yokota, A. Yoshikawa"Investigations of Optical and Scintillation Properties of (Lu0.1Y0.9)AlO3:Nd0.1% ""Scintillation Properties of Transparent Ceramic Pr:LuAG for Different Pr Concentration "11th International Conference on Inorganic Scintillators and their Applications (SCINT

11th International Conference on Inorganic Scintillators and their Applications (SCINT

2011), 2011. 9.12-16, Giessen, Germany(2011)2011), 2011. 9.12-16, Giessen, Germany(2011)41. Y. Fujimoto, T. Yanagida, Y.Yokota, A. Yoshikawa

56

42. K. Kamada, T. Yanagida, T. Endo, K. Tsutumi, Y. Usuki, M. Nikl, Y. Fujimoto, A.

48. K. Kamada, T. Yanagida, T. Endo, K. Tsutumi, Y. Usuki, M. Nikl, Y. Fujimoto, A.

"Scintillation Characteristic of Yb3+-Doped Gadolinium Gallium Garnets with Different

Fukabori, A. Yoshikawa

Dopant Concentrations ""Crystal Growth and Scintillation Properties of Ce doped Gd3(Ga,Al)5O12 Single Crystal "11th International Conference on Inorganic Scintillators and their Applications (SCINT

11th International Conference on Inorganic Scintillators and their Applications (SCINT

2011), 2011. 9.12-16, Giessen, Germany(2011)2011), 2011. 9.12-16, Giessen, Germany(2011)57

49. D. Totsuka, T. Yanagida, M. Sugiyama, Y. Fujimoto, T. Yanagitani Y.Yokota, A.

56. A. Yamaji, T. Yanagida, Y. Yokota, N. Kawaguchi, K. Watanabe, A. Yamazaki, A.

Yoshikawa

Yoshikawa"Crystal Growth and Scintillation Properties of Tm-Doped YAlO3 ""Crystal Growth and Scintillation Properties of Eu,Rb Co-Doped LiCAlF6 Single Crystals "11th International Conference on Inorganic Scintillators and their Applications (SCINT

11th International Conference on Inorganic Scintillators and their Applications (SCINT

2011), 2011. 9.12-16, Giessen, Germany(2011)2011), 2011. 9.12-16, Giessen, Germany(2011)

50. A. Yoshikawa, Y. Futami, T. Yanagida, Y. Fujimoto, S. Kurosawa, Y.Yokota, M. Sugiyama,

57. Y. Yokota, T. Yanagida, A. Yamaji, Y. Futami, N. Kawaguchi, K. Fukuda, A. Yoshikawa

S. Wakahara, M. Kikuchi, M. Nikl

"Effects of Ironic Radius Control at Ca Site for Ce Doped LiCaAlF6 by Sr Co-Doping on"Crystal Growth and Scintillation Properties of Lu-Free Langasite-Type Single Crystals "the Crystal Growth and Physical Properties "11th International Conference on Inorganic Scintillators and their Applications (SCINT

11th International Conference on Inorganic Scintillators and their Applications (SCINT

2011), 2011. 9.12-16, Giessen, Germany(2011)2011), 2011. 9.12-16, Giessen, Germany(2011)

51. A. Yoshikawa, K. Kamada, T. Yanagida, Y. Fujimoto, S. Kurosawa, M. Sugiyama, S.

58. Y. Yokota, A. Yamaji, V. Kochurikhin, T. Yanagida, N. Kawaguchi, K. Fukuda, Y. Futami,

Wakahara, Y. Futami, Y.Yokota, K. Yubuta, T. Shishido, M. Kikuchi, M. Nikl

A. Yoshikawa"Lu-free Highly Efficient Scintillator Ce:Gd3(Ga,Al)5O12; the Effect of Preparation"Crystal Growth of Ce Doped LiYF4 with High Ce Concentration by Cz Method and theTechnology on Scintillation Properties "Scintillation Properties "11th International Conference on Inorganic Scintillators and their Applications (SCINT

11th International Conference on Inorganic Scintillators and their Applications (SCINT

2011), 2011. 9.12-16, Giessen, Germany(2011)2011), 2011. 9.12-16, Giessen, Germany(2011)

52. Y. Fujimoto, T. Yanagida, Y. Yokota, N. Kawaguti, K. Fukuda, D. Totsuka, K. Watanabe,

59. M. Sugiyama, T. Yanagida, Y. Fujimoto, N. Kawaguchi, Y. Yokota, A. Yoshikawa

A. Yamazaki, A. Yoshikawa"Crystal Growth and Scintillation Properties of Rare Earth Doped BaMgF4 Single Crystals"Comparative Study of Scintillation Properties of CaO-B2O3 Crystals ""11th International Conference on Inorganic Scintillators and their Applications (SCINT

11th International Conference on Inorganic Scintillators and their Applications (SCINT

2011), 2011. 9.12-16, Giessen, Germany(2011)2011), 2011. 9.12-16, Giessen, Germany(2011)

53. S. Kurosawa, Y. Furuya, T. Yanagida, Y. Yokota, A. Yoshikawa

60. J. Pejchal, K. Fukuda, M. Nikl, N. Kawaguchi, T. Yanagida, Y. Yokota, A. Yoshikawa"Crystal Growth and Scintillation Properties of Fluoride Scintillators ""Luminescence and Scintillation Properties of VUV Scintillation Crystals Based on

11th International Conference on Inorganic Scintillators and their Applications (SCINT

Lu-Admixed BaY2F8 "2011), 2011. 9.12-16, Giessen, Germany(2011)

11th International Conference on Inorganic Scintillators and their Applications (SCINT

54. S. Kurosawa, A. Yamaji, T. Yanagida, Y. Yokota, A. Yoshikawa"Scintillation Properties and Gamma-Ray Response of Pr-Doped CeF3 "2011), 2011. 9.12-16, Giessen, Germany(2011)
61. T. Isgimaru, M. Ieda, S. Ono, K. Yamanoi, M. Cadatal-Rauban, T. Shimizu, N. Sarukura, K.

11th International Conference on Inorganic Scintillators and their Applications (SCINT

Fukuda, T. Suyama, Y. Yokota, T. Yanagida, A. Yoshikawa

2011), 2011. 9.12-16, Giessen, Germany(2011)"Nd3+:LaF3 Thin Films Grown by Pulsed Laser Deposition as Vacuum Ultraviolet Light

55. N. Kawaguchi, T. Yanagida, Y. Futami, Y. Fujimoto,A. Yamazaki, K. Watanabe, K.
Fukuda, S. Kajimoto, H. Fukumura, Y. Yokota, A. Yoshikawa"Light Output Uniformity of Czochralski Grown Ce Doped 6LiCaAlF6 Single Crystal for

Emitting Device Material and Scintillator "11th International Conference on Inorganic Scintillators and their Applications (SCINT
2011), 2011. 9.12-16, Giessen, Germany(2011)

Thermal Neutron Detection "11th International Conference on Inorganic Scintillators and their Applications (SCINT
2011), 2011. 9.12-16, Giessen, Germany(2011)58

59

62. J. Martincik, M. Nikl, S. Ishizu, A. Baratova, T. Cechak, K. Fukuda, T. Suyama, A.

68. Y. Yokota, T. Yanagida, D. Totsuka, N. Kawaguchi, K. Fukuda, A. Yamaji, Y. Fujimoto, A.

Beitlerova, A. Yoshikawa

Yoshikawa"Concentration Dependence of VUV-UV-Visible Luminescence of Nd3+ and Gd3+ in"Crystal Growth of Iodide Scintillators by a Modified Micro-Pulling-Down Method and

LuLiF4 "their Physical Properties "11th International Conference on Inorganic Scintillators and their Applications (SCINT

11th International Conference on Inorganic Scintillators and their Applications (SCINT

2011), 2011. 9.12-16, Giessen, Germany(2011)2011), 2011. 9.12-16, Giessen, Germany(2011)

63. N. Kawaguchi, T. Yanagida, Y. Futami, Y. Fujimoto, K. Fukuda, S. Kajimoto, H. Fukumura,

69. G. Boulon, T. Epicier, V. Chani, A. Yoshikawa, L. Esposito

Y. Yokota, A. Yoshikawa"TEM Analysis of Rare Earth Dopant Distribution in YAG Optical Ceramics ""VUV Luminescence with Nd Doped KCaF3 under X-Ray Excitation "4th The International Workshop on Photoluminescence in Rare-Earths : Photonic Materials

11th International Conference on Inorganic Scintillators and their Applications (SCINT

and Devices (PRE12), 2012.3.27-30, Kyoto, Japan2011), 2011. 9.12-16, Giessen, Germany(2011)
64. N. Kawaguchi, T. Yanagida, Y. Futami, Y. Fujimoto, K. Fukuda, S. Kajimoto, H. Fukumura,

70. N. Kawaguchi, T. Yanagida, Y. Futami, Y. Fujimoto, K. Fukuda, S. Kajimoto, H. Fukumura,
S. Kurosawa, Y. Yokota, A. Yoshikawa

Y. Yokota, A. Yoshikawa"Doping Concentration Dependence on VUV Luminescence of Tm:CaF2 ""Scintillation of Rare-Earth-Ion Doped CaF2 under α-ray Excitation "4th The International Workshop on Photoluminescence in Rare-Earths : Photonic Materials

11th International Conference on Inorganic Scintillators and their Applications (SCINT

and Devices (PRE12), 2012.3.27-30, Kyoto, Japan2011), 2011. 9.12-16, Giessen, Germany(2011)
65. S. Wakahara, Y. Furuya, T. Yanagida, Y. Yokota, M. Sugiyama, A. Yoshikawa

71. A. Yoshikawa, K. Kamada, T. Yanagida, Y. Fujimoto, S. Kurosawa, M. Sugiyama, S.
Wakahara, Y. Futami, Y.Yokota, K. Yubuta, T. Shishido, M. Kikuchi, M. Nikl

"Crystal Growth and Scintillation Properties of Ce Doped Sodium Calcium Lutetium"The effect of preparation technology on scintillation properties of Ce:Gd3(Ga,Al)5O12

Complex Fluoride "single crystal "11th International Conference on Inorganic Scintillators and their Applications (SCINT

4th The International Workshop on Photoluminescence in Rare-Earths : Photonic Materials2011), 2011. 9.12-16, Giessen, Germany(2011)and Devices (PRE12), 2012.3.27-30, Kyoto, Japan

66. M. Ieda, T. Ishimaru, S. Ono, N. Kawaguchi, K. Fukuda, T. Suyama, Y. Yokota, T.

72. T. Murata, K. Yamanoi, Y. Arikawa, T. Nakazato, M. Cadatal-Raduban, T. Shimizu, N.

Yanagida, A. Yoshikawa

Sarukura, M. Nakai, T. Norimatsu, Y. Hironaka, H. Nishimura, H. Azechi, K. Fukuda, T.

"Vacuum Ultraviolet Photoconductive Detector Fabricated on NdF3 Thin Film "Suyama, S. Fujino, H. Yoshida, A.Yoshikawa, N. Sato, H. Kan

11th International Conference on Inorganic Scintillators and their Applications (SCINT"Luminescent Properties of Nd3+-Doped Glasses in the VUV Region "2011), 2011. 9.12-16, Giessen, Germany(2011)

4th The International Workshop on Photoluminescence in Rare-Earths : Photonic Materials

67. D. Totsuka, T. Yanagida, Y. Fujimoto, Y. Yokota, A. Yoshikawa

and Devices (PRE12), 2012.3.27-30, Kyoto, Japan"Scintillation Properties of Pure CsI Crystals Grown by Micro-Pulling-Down Method "73. A.Yamaji, T.Yanagida, Y. Fujimoto, N. Kawaguchi, K. Fukuda, Y. Yokota, A. Yoshikawa

11th International Conference on Inorganic Scintillators and their Applications (SCINT"Luminescence properties of Nd3+ doped LuLiF4 single crystals with different dopant

2011), 2011. 9.12-16, Giessen, Germany(2011)

concentrations "4th The International Workshop on Photoluminescence in Rare-Earths : Photonic Materials
and Devices (PRE12), 2012.3.27-30, Kyoto, Japan

60

61

74. D. Totsuka, T. Yanagida, M. Sugiyama, Y. Fujimoto, Y. Yokota, A. Yoshikawa"Effect of co-doping in Tm-doped mixed rare earth perovskite "B. Domestic Conferences
国内学会

4th The International Workshop on Photoluminescence in Rare-Earths : Photonic Materials
and Devices (PRE12), 2012.3.27-30, Kyoto, Japan

1. 吉川 彰"東北大における東日本大震災の被災状況と復興に向けた活動について "75. S. Kurosawa, Y. Yokota, T. Yanagid, A. Yoshikawa

レーザー研シンポジウム 2011, 2011.5.10-5.11, 大阪, 大阪大学 (Invited)(2011)"Investigation of Fluoride Crystals with co-dopant including Na "4th The International Workshop on Photoluminescence in Rare-Earths : Photonic Materials
and Devices (PRE12), 2012.3.27-30, Kyoto, Japan

2. 横田有為，山路晃広, 吉川 彰，柳田健之，佐藤 真人， 遠田一重, 小野寺晃
"マイクロ引き下げ法を用いた形状制御ランガサイト型圧電結晶の育成とその特性
評価 "76. M. Tsuboi, M. Kouno, T. Nakazato, T. Shimizu, M. Cadatal-Raduban, K. Yamanoi, K.

第 28 回強誘電体応用会議(FMA28), 2011.5.25-5.28, 京都, コープイン京都 (2011)

Sakai, R. Nishi, Y. Minami, Y. Arikawa, N. Sarukura, T. Norimatsu, M. Nakai, H. Azechi,
T. Murata, S. Fujino, H. Yoshida, T. Suyama, K. Fukuda, A. Yoshikawa, N. Sato, H. Kan,

3. 杉山 誠, 藤本 裕, 柳田 健之, 戸塚 大輔, 横田 有為, 吉川 彰

K. Kamada, and Y. Usuki"Nd 添加 LuAG 単結晶を用いた X 線撮像検出器の試作 ""Electronic States of Trivalent Rare Earth Ion Doped in APLF Glass "第 23 回 放射線夏の学校, 2011.8.1-8.3, 宮城, 仙台市(2011)

4th The International Workshop on Photoluminescence in Rare-Earths : Photonic Materials
and Devices (PRE12), 2012.3.27-30, Kyoto, Japan
77. N. Sarukura K.Yamanoi, R. Nishi, Y.Shinzato,T.Nakazato, M. Cadatal-Raduban, T.
Shimizu , K. Fukuda, T.Suyama, T. Yanagida, Y. Yokota, A. Yoshikawa,
M.Nagasono,T.Togashi, T. Sato,T. Ishikawa"EUV Free-Electron LaserInduced Vacuum-Ultraviolet Fluorescence from Nd3+:LuLiF4 "4th The International Workshop on Photoluminescence in Rare-Earths : Photonic Materials
and Devices (PRE12), 2012.3.27-30, Kyoto, Japan
78. T. Yanagida Y. Fujimoto, Y. Futami, D. Totsuka, N. Kawaguchi, A. Yoshikawa"Study of Rare Earth Doped Scintillators "4th The International Workshop on Photoluminescence in Rare-Earths : Photonic Materials
and Devices (PRE12), 2012.3.27-30, Kyoto, Japan

4. 島添健次，高橋浩之，鎌田 圭，吉野将生，片岡 淳，柳田健之，吉川 彰，熊谷和明
"ToT 読出を用いた小型 LuAG-APD-PET の開発 "第 71 回応用物理学会学術講演会, 2011. 8.29-9. 2, 山形, 山形大学 (2011)
5. 宮本由香，小林晴紀，竹井義法，南戸秀仁，黒堀利夫，柳田建之，吉川 彰，坂倉政明，下間靖彦，三浦清貴，平尾一之，長島祐香里，山本幸佳"「放射線賞受賞記念講演」蛍光ガラス線量計用銀活性リン酸塩ガラスのラジオフォ
トルミネッセンスに関する研究 "第 71 回応用物理学会学術講演会, 2011. 8.29-9. 2, 山形, 山形大学 (2011)
6. 近藤良行，山崎 淳，渡辺賢一，瓜谷 章，井口哲夫，柳田健之，河口範明，藤本裕，横田有為，鎌田 圭，福田健太郎，須山敏久，吉川 彰" Ce:LiCaAlF6 シンチレータにおけるデジタル波形処理を用いた中性子/ガンマ線弁
別性能の評価 "第 71 回応用物理学会学術講演会, 2011. 8.29-9. 2, 山形, 山形大学 (2011)
7. 若原慎吾，古谷優貴，柳田健之，横田有為，杉山 誠，吉川 彰" Ce 添加 Na2CaLu2F10 単結晶の作製および光学特性評価 "第 71 回応用物理学会学術講演会, 2011. 8.29-9. 2, 山形, 山形大学 (2011)
8. 山路晃広，柳田健之，河口範明，藤本 裕，横田有為，渡辺賢一，山崎 淳，吉川彰
" 希土類添加 LiSrAlF6 単結晶の作製と中性子応答特性 "第 71 回応用物理学会学術講演会, 2011. 8.29-9. 2, 山形, 山形大学 (2011)

6263

9. 丸山秀典，渡辺賢一，瓜谷 章，山崎 淳，河口範明，福田健太郎，柳田健之，吉川

彰

17. 河口範明，柳田健之，藤本 裕，二見能資，渡辺賢一，山崎 淳，福田健太郎，黒澤俊介，横田有為，吉川 彰" 小型指向性中性子検出器による原子炉内中性子方向分布計測 "" 3d 遷移金属元素添加 6LiCaAlF6 の中性子応答特性 "第 71 回応用物理学会学術講演会, 2011. 8.29-9. 2, 山形, 山形大学 (2011)

第 71 回応用物理学会学術講演会, 2011. 8.29-9. 2, 山形, 山形大学 (2011)10. 藤本 裕，柳田健之，横田有為，河口範明，福田健太郎，戸塚大輔，渡辺賢一，山崎淳，吉川 彰" カルシウムオルソボレートシンチレータの作製と特性評価 "第 71 回応用物理学会学術講演会, 2011. 8.29-9. 2, 山形, 山形大学 (2011)
11. 杉山 誠，藤本 裕，柳田健之，戸塚大輔，横田有為，吉川 彰" 希土類添加ルテチウムアルミニウムガーネット単結晶の発光特性 "第 71 回応用物理学会学術講演会, 2011. 8.29-9. 2, 山形, 山形大学 (2011)12. 鎌田 圭，柳田健之，Martin Nikl，遠藤貴範，堤 浩輔，薄 善行，深堀明博，藤本裕，吉川 彰" Pr: (Lu,Y)3(Ga,Al)5O12(LYGAG)単結晶のマイクロ引き下げ法による作製とシンチ
レータ特性評価 "第 71 回応用物理学会学術講演会, 2011. 8.29-9. 2, 山形, 山形大学 (2011)13. 遠藤貴範，鎌田 圭，柳田健之，堤 浩輔，藤本 裕，薄 善行，吉川 彰" Ce: (Lu,Gd)3(Ga,Al)5O12(LGGAG)単結晶のマイクロ引き下げ法による作製とシンチレータ特性評価 "第 71 回応用物理学会学術講演会, 2011. 8.29-9. 2, 山形, 山形大学 (2011)
14. 山ノ井航平，西 亮祐，南 佑輝，Cadatal-Raduban Marilou，清水俊彦，猿倉信彦，
畦地 宏，村田孝広，福田健太郎，須山敏尚，吉川 彰，佐藤仲弘，管 博文" Nd ガラスからの高速応答真空紫外発光 "第 71 回応用物理学会学術講演会, 2011. 8.29-9. 2, 山形, 山形大学 (2011)15. 二見能資，柳田健之，藤本 裕，河口範明，黒澤俊介，横田有為，吉川 彰" La3Ga5SiO14 と La3Nb0.5Ga5.3Al0.2O14, La3Tb0.5Ga5.3Al0.2O14 の光励起発光と18. 柳田健之，鎌田 圭，藤本 裕，杉山 誠，山路晃広，横田有為，吉川 彰" Pr を添加した YAP 結晶シンチレータの基礎特性評価 "第 71 回応用物理学会学術講演会, 2011. 8.29-9. 2, 山形, 山形大学 (2011)19. 坂野大翔，渡辺賢一，山崎 淳，田中秀彦，柳田健之，横田有為，吉川 彰"シンチレータを用いた機能性コリメータ型ガンマカメラの開発 "第 71 回応用物理学会学術講演会, 2011. 8.29-9. 2, 山形, 山形大学 (2011)
20. 鎌田 圭，柳田健之，マーチン ニクル，遠藤貴範，堤 浩輔，藤本 裕，深堀明博，
薄善行，吉川 彰"Ce: Gd3(Ga,Al)5O12(GGAG)単結晶の大型化とシンチレータ特性評価 "第 71 回応用物理学会学術講演会, 2011. 8.29-9. 2, 山形, 山形大学 (2011)
21. 戸塚大輔，柳田健之，福田健太郎，河口範明，藤本 裕，横田有為，吉川 彰" Si-PIN 型フォトダイオードリニアアレイを用いた熱中性子スキャナの性能評価 "第 71 回応用物理学会学術講演会, 2011. 8.29-9. 2, 山形, 山形大学 (2011)22. 柳田健之, 藤本裕, 鎌田圭, 横田有為, 吉川彰, 八木秀喜, 柳谷高公
"透明セラミックス Pr:LuAG シンチレータの医療応用に向けた研究 "日本セラミックス協会 第 24 回秋季シンポジウム, 2011. 9. 7-9. 9, 北海道, 北海道大学 (2011)23. 藤本裕, 杉山誠, 山路晃広, 横田有為, 吉川彰, 柳田健之, 池末明生
"Tm3+:Y2O3 及び Nd3+:Lu2O3 セラミックスの発光特性と放射線応答 "日本セラミックス協会 第 24 回秋季シンポジウム, 2011. 9. 7-9. 9, 北海道, 北海道大学 (2011)24. 杉山誠, 横田有為, 伊藤暁彦, LiqiongAn, 藤本裕, 後藤孝, 吉川彰, 柳田健之

Alpha 線励起発光 ""SPS による Eu 添加 Lu2O3 および Y2O3 セラミックスの作製とシンチレーション

第 71 回応用物理学会学術講演会, 2011. 8.29-9. 2, 山形, 山形大学 (2011)

特性 "16. 小野寺晃，二見能資，横田有為，佐藤真人，遠田一重，柳田健之，吉川 彰" μ-PD 法を用いた Sapphire 結晶育成の形状制御 "日本セラミックス協会 第 24 回秋季シンポジウム, 2011. 9. 7-9. 9, 北海道, 北海道大学 (2011)

第 71 回応用物理学会学術講演会, 2011. 8.29-9. 2, 山形, 山形大学 (2011)64

65

25. 宍戸統悦, 湯葢邦夫, 森孝雄, 岡田繁, 工藤邦男, 野村明子, 菅原孝昌, 手嶋勝弥, 吉

32. 鎌田 圭，柳田健之，Jan Pejchal，Martin Nikl，遠藤貴範，堤 浩輔，藤本 裕，吉川彰, 大石修治, 川添良幸

川 彰

"RT2B2（R＝希土類元素，T＝遷移金属）と RT2B2C の相関係に関する研究 "" Ce: (Lu,Y)3(Ga,Al)5O12(LYGAG)単結晶のマイクロ引き下げ法による作製とシンチ

日本セラミックス協会 第 24 回秋季シンポジウム, 2011. 9. 7-9. 9, 北海道, 北海道大レータ特性評価"学 (2011)2012 年春季 第 59 回 応用物理学関係連合講演会, 2011. 3.15-18, 東京, 早稲田大学

26. 村田貴広, 山ノ井航平, 有川安信, マリルー・カダタル, 中里智治, 清水俊彦, 猿倉信彦, 中井光男, 乗松孝好, 西村博明, 疇地 宏, 福田健太郎, 須山敏尚, 藤野茂, 吉田（2012/3/17 口頭発表）
33. 藤本 裕，柳田健之，河口範明，黒澤俊介，福田健太郎，戸塚大輔，渡辺賢一，山英樹, 鎌田 圭, 薄 善行, 吉川 彰, 佐藤仲弘, 菅 博文

崎 淳，横田有為，吉川 彰"Nd3+ドープガラスの真空紫外発光特性 ""講演奨励賞受賞記念講演・CaO-B2O3 結晶の作製とシンチレーション特性評価"

第 52 回 ガラスおよびフォトニクス材料討論会, 2011. 11.24- 1.25, 兵庫, イーグレ姫

2012 年春季 第 59 回 応用物理学関係連合講演会, 2011. 3.15-18, 東京, 早稲田大学

路 (2011)（2012/3/17 口頭発表）

27. 宍戸統悦, 湯葢邦夫, 野村明子, 田中雅彦, 森 孝雄, 工藤邦男, 岡田 繁, 吉川 彰

34. 新里悠希，山ノ井航平，西 亮介，Cadatal-Raduban Marilou，中里智治，清水俊彦，"ペロブスカイト型ホウ化物固溶体 La1-xRxRh3B (R = Gd, Lu, Sc)の形成に関する研○猿倉信彦，福田健太郎，須山敏尚，柳田健之，横田有為，吉川 彰，永園 充，

究 "

石川哲也

第 7 回 国内ホウ素・ホウ化物研究会, 2011. 12. 3, 東京, 国士舘大学世田谷キャンパ" EUV-FEL を用いた真空紫外発光材料の評価"

ス(2011)

2012 年春季 第 59 回 応用物理学関係連合講演会, 2011. 3.15-18, 東京, 早稲田大学（2012/3/17 口頭発表）

28. 杉山誠, 柳田健之, 藤本裕, 横田有為, ○吉川彰
"放電プラズマ焼結によるガーネットセラミックスの作製と特性評価"

35. 渡辺賢一，川端勇矢，山崎 淳，瓜谷 章，柳田健之，河口範明，福田健太郎，吉日本セラミックス協会 2012 年年会,2011. 3.19-21, 京都, 京都大学 （2012/3/21 口頭

川 彰

発表）

"放射線分科内招待講演・光ファイバ型 BNCT 中性子場モニタの開発"

29. 二見 能資，柳田 健之, 藤本 裕, 杉山 誠, Jan Pejchal, 黒澤 俊介, 横田 有為, 吉川

2012 年春季 第 59 回 応用物理学関係連合講演会, 2011. 3.15-18, 東京, 早稲田大学（2012/3/17 口頭発表）

彰 ,伊藤 暁彦, 後藤 孝
"放電プラズマ焼結（SPS）法で作成した Sc2O3、Y2O3 及び Lu2O3 セラミックスシ

36. 宮本由香，大野 健，竹井義法，南戸秀仁，黒堀利夫，柳田建之，吉川 彰，坂倉

ンチレータの放射線応答"

政明，下間靖彦，三浦清貴，平尾一之，山本幸佳

日本セラミックス協会 2012 年年会,2011. 3.19-21, 京都, 京都大学 （2012/3/19 ポス"α 線照射における銀活性リン酸塩ガラスの光学特性"

ター発表）

2012 年春季 第 59 回 応用物理学関係連合講演会, 2011. 3.15-18, 東京, 早稲田大学（2012/3/17 口頭発表）

30. 黒澤俊介、横田有為、柳田健之、吉川 彰"放電プラズマ焼結法による Ce:SrHfO3 の開発と光物性特性評価"

37. 高橋嘉彦，渡辺賢一，山崎 淳，瓜谷 章，柳田健之，河口範明，福田健太郎，吉日本セラミックス協会 2012 年年会,2011. 3.19-21, 京都, 京都大学 （2012/3/19 ポス

川 彰

ター発表）

"シンチレータにおける発光波長特性を用いた中性子/ガンマ線弁別に関する基礎研
究"

31. 黒澤俊介、柳田健之、藤本裕、山路晃広、杉山誠、若原慎吾、横田有為、吉川彰、
河口範明、石津澄人、福田健太郎、中川正則、須山敏尚、渡辺賢一、高橋弘充

2012 年春季 第 59 回 応用物理学関係連合講演会, 2011. 3.15-18, 東京, 早稲田大学（2012/3/17 口頭発表）"中性子検出用 LiCAF シンチレータの開発"
日本物理学会第 67 回年次大会（2012/3/24-27、関西学院大学西宮上ケ原キャンパス） （2012/3/27 口頭発表）

66

67

38. 近藤良行，山崎 淳，渡辺賢一，瓜谷 章，井口哲夫，柳田健之，河口範明，藤本

45. 杉山誠, 柳田健之, 藤本裕, 横田有為, 吉川彰

裕，横田有為，鎌田 圭，福田健太郎，須山敏久，吉川 彰"ガーネット構造を有する透明セラミックスのシンチレーション特性評価""Ce:LiCaAlF6 シンチレータにおける発光特性の添加物濃度依存性に関する検討"

2012 年春季 第 59 回 応用物理学関係連合講演会, 2011. 3.15-18, 東京, 早稲田大学

2012 年春季 第 59 回 応用物理学関係連合講演会, 2011. 3.15-18, 東京, 早稲田大学（2012/3/17 口頭発表）（2012/3/17 口頭発表）
39. 河口範明，柳田健之，藤本 裕，二見能資，渡辺賢一，山崎 淳，福田健太郎，黒46. 戸塚大輔,柳田健之,杉山誠,藤本裕,横田有為,吉川彰"Tm を添加した混合希土類ペロブスカイト単結晶の作製と光学特性答"澤俊介，横田有為，Nikl Martin，吉川 彰

2012 年春季 第 59 回 応用物理学関係連合講演会, 2011. 3.15-18, 東京, 早稲田大学"束縛励起子準位の導入による Eu:LiCaAlF6 のシンチレーション特性向上"（2012/3/17 口頭発表）

2012 年春季 第 59 回 応用物理学関係連合講演会, 2011. 3.15-18, 東京, 早稲田大学（2012/3/17 口頭発表）

47. 二見 能資, 柳田 健之，藤本 裕, 杉山 誠,Jan Pejchal, 黒澤 俊介, 横田 有為, 吉川彰,伊藤 暁彦, 後藤 孝

40. 栗原正和，安宗貴志，小田典治，前畑京介，石橋健二，吉川 彰，梅野高裕"Sc2O3、Y2O3 及び Lu2O3 セラミックスシンチレータの放射線応答""低温領域における YAP:Yb 結晶シンチレーション特性の測定"

2012 年春季 第 59 回 応用物理学関係連合講演会, 2011. 3.15-18, 東京, 早稲田大学

2012 年春季 第 59 回 応用物理学関係連合講演会, 2011. 3.15-18, 東京, 早稲田大学（2012/3/17 口頭発表）（2012/3/17 口頭発表）
41. 坪井瑞輝，河野雅弘，武田耕平，中里智治，○清水俊彦，Marilou Cadatal-Raduban，

48. 若原慎吾，柳田健之，横田有為，藤本裕，杉山誠，二見能資，吉川彰"放電プラズマ焼結法を用いた酸化マグネシウムの燐光特性評価"

山ノ井航平，酒井浩平，西 亮介，南 佑輝，有川安信，猿倉信彦，乗松孝好，中2012 年春季 第 59 回 応用物理学関係連合講演会, 2011. 3.15-18, 東京, 早稲田大学

井光男，疇地 宏，村田貴広，藤野 茂，吉田英樹，須山敏尚，福田健太郎，吉川（2012/3/17 口頭発表）

彰，佐藤仲弘，菅 博文，鎌田 圭" 発光特性測定による APLF ガラスホスト中 Pr3+の電子状態の研究"
2012 年春季 第 59 回 応用物理学関係連合講演会, 2011. 3.15-18, 東京, 早稲田大学（2012/3/17 口頭発表）
42. 柳田健之，藤本 裕，黒澤俊介，渡辺賢一，八木秀喜，柳谷高公，Jary Vitezslav，
二見能資，横田有為，吉川 彰，瓜谷 章，井口哲夫，Martin Nikl
"電荷移動遷移を利用した高速シンチレータの基礎研究"
2012 年春季 第 59 回 応用物理学関係連合講演会, 2011. 3.15-18, 東京, 早稲田大学（2012/3/17 口頭発表）
43. 横田 有為, 二見 能資, 佐藤 真人, 遠田 一重, 柳田 健之, 小野寺 晃, 吉川 彰
"板状 Ca3NbGa3Si2O14 圧電結晶の結晶育成と特性評価"
2012 年春季 第 59 回 応用物理学関係連合講演会, 2011. 3.15-18, 東京, 早稲田大学（2012/3/17 口頭発表）
44. 黒澤俊介、柳田祥男、窪 秀利、谷上幸次郎、福田健太郎、河口範明、石津澄人、中川正則、須山敏尚、柳田健之、横田有為、吉川 彰"真空紫外線発光 シンチレータ用の反射材の開発"
2012 年春季 第 59 回 応用物理学関係連合講演会, 2011. 3.15-18, 東京, 早稲田大学（2012/3/17 口頭発表）

68

69

List of Publications

70

71

1.

8.

JOURNAL OF CERAMIC PROCESSING RESEARCH Volume: 12 Issue: 2 Pages: 169-172 Published: APR 2011

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 633 Supplement: 1 Pages: S36-S39 Published: MAY 2011

Crystal growth and thermal conductivity of an Tm3+-doped Y2O3 for IR eye-safelaser

A new imaging device based on UV scintillators and a large area gas
photomultiplierJH. Mun , A. Jouini , A. Novoselov , A. Yoshikawa , T. Fukuda

H Sekiya , C Ida , H Kubo , S Kurosawa , K Miuchi , T Tanimori , K Taniue , A Yoshikawa , T Yanagida ,Y Yokota , K Fukuda , S Ishizu , N Kawaguchi , T Suyama

2.

JOURNAL OF CRYSTAL GROWTH Volume: 320 Issue: 1 Pages: 63-68 Published: APR 1 20119.

Crystal growth and characterization of (NaxCa1-2xLux)F-2 single crystals

Growth of Tm3+-Doped Y2O3, Sc2O3, and Lu2O3 Crystals by the Micropulling
down Technique and Their Optical and Scintillation Characteristics

Y Furuya , H Tanaka , K Fukuda , N Kawaguchi , Y Yokota , T Yanagida , V Chani , M Nikl , A Yoshikawa

3.

A Fukabori , V Chani , K Kamada , F Moretti , A Yoshikawa

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS
DETECTORS AND ASSOCIATED EQUIPMENT Volume: 634 Issue: 1 Pages: 59-63 Published: APR 1 2011

Time- and wavelength-resolved luminescence evaluation of several types ofscintillators using streak camera system equipped with pulsed X-ray source

10.

4.

OPTICAL MATERIALS Volume: 33 Issue: 8 Pages: 1143-1146 Published: JUN 2011

Crystal growth and optical properties of the Nd3+ doped LuF3 single crystals
K Fukuda , S Ishizu , N Kawaguchi , T Suyama , T Yanagida , Y Yokota , M Nikl , A Yoshikawa

Y Furuya , T Yanagida , Y Fujimoto , Y Yokota , K Kamada , N Kawaguchi , S Ishizu , K Uchiyama , K Mori ,K Kitano , M Nikl , A Yoshikawa

CRYSTAL GROWTH & DESIGN Volume: 11 Issue: 6 Pages: 2404-2411 Published: JUN 2011

11.

OPTICAL MATERIALS Volume: 33 Issue: 8 Pages: 1243-1247 Published: JUN 2011

Basic study of Europium doped LiCaAlF6 scintillator and its capability for thermal
neutron imaging application

OPTICAL MATERIALS Volume: 33 Issue: 6 Pages: 877-881 Published: APR 2011

Crystal growth and thermal neutron scintillation response of Ce doped(KLiYF5)-Li-6

T Yanagida , N Kawaguchi , Y Fujimoto , K Fukuda , Y Yokota , A Yamazaki , K Watanabe , J Pejchal , A
Uritani , T Iguchi , A Yoshikawa

Y Furuya , H Tanaka , N Kawaguchi , T Yanagida , Y Yokota , A Yamazaki, , K Watanabe , A Yoshikawa

12.
5.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERSOPTICAL MATERIALS Volume: 33 Issue: 6 Pages: 905-908 Published: APR 2011

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 643 Issue: 1 Pages: 57-63 Published: JUL 1 2011

Crystal growth and scintillation properties of Nd-doped Lu3Al5O12 single crystals
with different Nd concentrations

The development and performance of UV-enhanced APD-arrays for high resolution
PET imaging coupled with pixelized Pr:LuAG crystal

M Sugiyama , Y Fujimoto , T Yanagida , Y Yokota , J Pejchal , Y Furuya , H Tanaka , A Yoshikawa

M Yoshino , J Kataoka , T Nakamori , H Matsuda , T Miura , T Katou , Y Ishikawa , N Kawabata , Y
Matsunaga , K Kamada , Y Usuki , A Yoshikawa , T Yanagida

6.

OPTICAL MATERIALS Volume: 33 Issue: 6 Pages: 924-927 Published: APR 2011

Crystal growth and scintillation characteristics of the Nd3+ doped LiLuF4 single
crystals

7.

13.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS
DETECTORS AND ASSOCIATED EQUIPMENT Volume: 643 Issue: 1 Pages: 64-68 Published: JUL 1 2011

K Fukuda , N Kawaguchi , S Ishizu, T Nagami, T Suyama , T Yanagida , Y Yokota , M Nikl , A Yoshikawa

Crystal growth and scintillation properties of Pr-doped oxyorthosilicate for different
concentration

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS

D Totsuka , T Yanagida , Y Fujimoto , J Pejchal , Y Yokota , A Yoshikawa

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 635 Issue: 1 Pages: 53-56 Published: APR 11 2011

Comparative study of optical and scintillation(Lu0.5Y0.5)VO4, and LuVO4 single crystals

properties

Y Fujimoto , T Yanagida , Y Yokota , V Chani , VV Kochurikhin , A Yoshikawa

of

YVO4,

14.

JAPANESE JOURNAL OF APPLIED PHYSICS Volume: 50 Issue: 9 Article Number: 090207 Published: SEP 2011

Absence of Host Cation Segregation in the (Gd,Y)(3)Al5O12 Mixed Garnet Optical
Ceramics
G Boulon , T Epicier , W Zhao , VI Chani , T Yanagida , A Yoshikawa

72

73

15.

JAPANESE JOURNAL OF APPLIED PHYSICS Volume: 50 Issue: 9 Special Issue: SI Article Number: 09ND03 Published:

22.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS

SEP 2011

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 652 Issue: 1 Pages: 351-354 Published: OCT 1 2011

Growth of Shape-Controlled Ca3NbGa3Si2O14 and Sr3NbGa3Si2O14 Single
Crystals by Micro-Pulling-Down Method and Their Physical Properties

Thermal neutron imaging with rare-earth-ion-doped LiCaAlF6 scintillators and asealed Cf-252 source

Y Yokota , M Sato , K Tota , Y Futami , T Yanagida , K Onodera , A Yoshikawa

N Kawaguchi , T Yanagida , Y Fujimoto , Y Yokota , K Kamada , K Fukuda , T Suyama , K Watanabe , A
Yamazaki , V Chani , A Yoshikawa

16.

OPTICAL MATERIALS Volume: 33 Issue: 11 Pages: 1638-1642 Published: SEP 2011

Monophase domain, fibers single crystals grown by the micro-pulling down
technique and optical characterisation of LiGd1-xYbx(WO4)(2)23.

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 652 Issue: 1 Pages: 435-438 Published: OCT 1 2011

Neutron-gamma discrimination based on pulse shape discrimination in a
Ce:LiCaAlF6 scintillator

B Rekik , M Derbal , L Guerbous , D Ouadjaout , A Nehari , E Romeo , A Brenier , A Yoshikawa , K Lebbou

17.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERSAPPLIED PHYSICS EXPRESS Volume: 4 Issue: 10 Article Number: 106401 Published: OCT 2011

A Yamazaki , K Watanabe , A Uritani , T Iguchi , N Kawaguchi , T Yanagida , Y Fujimoto , Y Yokota , K

Europium and Sodium Codoped LiCaAlF6 Scintillator for Neutron Detection

Kamada , K Fukuda , T Suyama, A Yoshikawa

T Yanagida , A Yamaji , N Kawaguchi , Y Fujimoto , K Fukuda , S Kurosawa , A Yamazaki , K Watanabe , Y
Futami , Y Yokota , A Uritani , T Iguchi , A Yoshikawa , M Nikl

24.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS
DETECTORS AND ASSOCIATED EQUIPMENT Volume: 652 Issue: 1 Pages: 209-211 Published: OCT 1 201118.

Fabrication and characterization of large size (LiF)-Li-6/CaF2:Eu eutectic
composites with the ordered lamellar structure

CRYSTAL GROWTH & DESIGN Volume: 11 Issue: 10 Pages: 4484-4490 Published: OCT 2011

Composition
Engineering
Single-Crystal Scintillatorsin

Cerium-Doped(Lu,Gd)(3)(Ga,Al)(5)O-12

N Kawaguchi , K Fukuda , T Yanagida , Y Fujimoto , Y Yokota , T Suyama , K Watanabe , A Yamazaki , A
Yoshikawa

K Kamada , T Endo , K Tsutumi , T Yanagida , Y Fujimoto , A Fukabori , A Yoshikawa , J Pejchal , M Nikl

19.

20.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS

25.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 652 Issue: 1 Pages: 251-255 Published: OCT 1 2011

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 652 Issue: 1 Pages: 238-241 Published: OCT 1 2011

Scintillation properties of Ce-doped LuLiF4 and LuScBO3

Scintillation and optical properties of Pb-doped YCa4O(BO3)(3) crystals

T Yanagida , Y Fujimoto , N Kawaguchi , Y Yokota , K Kamada , D Totsuka , SI Hatamoto , A Yoshikawa , V

Y Fujimoto , T Yanagida , Y Yokota , N Kawaguchi , K Fukuda , D Totsuka , K Watanabe , A Yamazaki , V

Chani

Chani , A Yoshikawa

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 652 Issue: 1 Pages: 256-259 Published: OCT 1 2011

26.

CRYSTAL GROWTH & DESIGN Volume: 11 Issue: 11 Pages: 4775-4779 Published: NOV 2011

Basic study of single crystal fibers of Pr:Lu3Al5O12 scintillator for gamma-ray
imaging applications

Crystal Growth of Na-Co-Doped Ce:LiCaAlF6 Single Crystals and Their Optical,
Scintillation, and Physical Properties

T Yanagida , K Kamada , N Kawaguchi , Y Fujimoto , K Fukuda , Y Yokota , V Chani , A Yoshikawa

Y Yokota , Y Fujimoto , T Yanagida , H Takahashi , M Yonetani , K Hayashi , I Park , N Kawaguchi , K Fukuda ,A Yamaji , Y Fukazawa , M Nikl, A Yoshikawa

21.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS
DETECTORS AND ASSOCIATED EQUIPMENT Volume: 652 Issue: 1 Pages: 319-322 Published: OCT 1 2011

Thermal neutron detection with Ce3+ doped LiCaAlF6 single crystals
J Iwanowska , L Swiderski , M Moszynski , T Yanagida , Y Yokota, A Yoshikawa
S Ishizu

K Fukuda , N Kawaguchi ,27.

OPTICAL MATERIALS Volume: 34 Issue: 1 Pages: 75-78 Published: NOV 2011

Crystal growth and scintillation properties of (NaxCa1-2xLux-yNdy)F-2 single
crystals
Y Furuya , S Wakahara , M Sugiyama , H Tanaka , K Fukuda , N Kawaguchi , Y Yokota , T Yanagida , A
Yoshikawa

74

75

28.

APPLIED PHYSICS EXPRESS Volume: 4 Issue: 12 Article Number: 126402 Published: DEC 201135.

RADIATION MEASUREMENTS Volume: 46 Issue: 12 Special Issue: SI Pages: 1480-1483 Published: DEC 2011

Ultrafast Transparent Ceramic Scintillators Using the Yb3+ Charge Transfer
Luminescence in RE2O3 HostRadiophotoluminescence from silver-doped phosphate glass

T Yanagida , Y Fujimoto , S Kurosawa , K Watanabe , H Yagi , T Yanagitani, , V Jary , Y Futami , Y Yokota , A

M Sakakura , K Miura , K Hirao , Y Nagashima , T Yamamoto

Y Miyamoto , Y Takei , H Nanto , T Kurobori , A Konnai , T Yanagida , A Yoshikawa , Y Shimotsuma ,Yoshikawa , A Uritani , T Iguchi , M Nikl

36.
29.

RADIATION MEASUREMENTS Volume: 46 Issue: 12 Special Issue: SI Pages: 1503-1505 Published: DEC 2011

Comparative study of transparent ceramic and single crystal Ce doped LuAG
scintillators

OPTICAL MATERIALS Volume: 34 Issue: 2 Pages: 414-418 Published: DEC 2011

Evaluations of pure and ytterbium doped transparent ceramic complex perovskite
scintillators

T Yanagida , Y Fujimoto , Y Yokota , K Kamada , S Yanagida , A Yoshikawa , H Yagi , T Yanagitani

T Yanagida , Y Fujimoto , Y Yokota , A Yoshikawa , S Kuretake , Y Kintaka , N Tanaka , K Kageyama , V
Chani

30.

37.

RADIATION MEASUREMENTS Volume: 46 Issue: 12 Special Issue: SI Pages: 1506-1508 Published: DEC 2011

Scintillation characteristics of Tm3+ in Ca-3(BO3)(2) crystals

OPTICAL MATERIALS Volume: 34 Issue: 2 Pages: 439-443 Published: DEC 2011

Y Fujimoto , T Yanagida , Y Yokota , N Kawaguchi , K Fukuda , D Totsuka , K Watanabe , A Yamazaki , A

Scintillation properties of Tm-doped Lu3Al5O12 single crystals

Yoshikawa

M Sugiyama , Y Fujimoto , T Yanagida , D Totsuka , Y Yokota , A Yoshikawa

38.
31.

RADIATION MEASUREMENTS Volume: 46 Issue: 12 Special Issue: SI Pages: 1708-1711 Published: DEC 2011

Ce and Eu-doped LiSrAlF6 scintillators for neutron detectors

OPTICAL MATERIALS Volume: 34 Issue: 2 Pages: 444-447 Published: DEC 2011

Growth and characterization of strontium metaborate scintillators

T Yanagida, N Kawaguchi , Y Fujimoto , Y Yokota , A Yamazaki , K Watanabe , K Kamada , A Yoshikawa , V

Y Fujimoto , T Yanagida , Y Yokota , N Kawaguchi , K Fukuda , D Totsuka , K Watanabe , A Yamazaki , A

Chani

Yoshikawa

32.

39.
OPTICAL MATERIALS Volume: 34 Issue: 2 Pages: 448-451 Published: DEC 2011

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 659 Issue: 1 Pages: 258-261 Published: DEC 11 2011

Evaluation of characterization of rare-earth doped sesquioxide ceramic scintillators

Scintillation properties of Nd3+, Tm3+, and Er3+ doped LuF3 scintillators in thevacuum ultra violet region

Y Fujimoto , T Yanagida , Y Yokota , A Ikesue , A Yoshikawa

33.

34.

T Yanagida , N Kawaguchi , K Fukuda , S Kurosawa , Y Fujimoto , Y Futami , Y Yokota , K Taniue , H Sekiya ,OPTICAL MATERIALS Volume: 34 Issue: 2 Pages: 452-456 Published: DEC 2011

Fundamental optical constants of Nd-doped Y2O3 ceramic and its scintillation
characteristics

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS

H Kubo , A Yoshikawa , T Tanimori

40.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS

A Fukabori , V Chani , J Pejchal , K Kamada , A Yoshikawa , T Ikegami

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 659 ssue: 1 Pages: 355-360 Published: DEC 11 2011

JOURNAL OF RARE EARTHS Volume: 29 Issue: 12 Pages: 1178-1182 Published: DEC 2011

Luminescence properties and gamma-ray response of the Ce and Ca co-doped(Gd,Y)F-3 single crystals

Development of novel rare earth doped fluoride and oxide scintillators for
two-dimensional imaging
A Yoshikawa , T Yanagida , Y Yokota , K Kamada , N Kawaguchi , K Fukuda , A Yamazaki , K Watanabe , A
Uritani , T Iguchi , G Boulon , M Nikl

K Kamada , T Yanagida , Y Fujimoto , A Fukabori , A Yoshikawa , M Nikl

41.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS
DETECTORS AND ASSOCIATED EQUIPMENT Volume: 659 Issue: 1 Pages: 368-372 Published: DEC 11 2011

Crystal growth and scintillation properties of Ce and Eu doped LiSrAlF6
A Yamaji , T Yanagida , N Kawaguchi , Y Fujimoto , Y Yokota , K Watanabe , A Yamazaki , A Yoshikawa , J
Pejchal

76

77

42.

43.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS

49.

OPTICAL MATERIALS Volume: 34 Issue: 5 Pages: 868-871 Published: MAR 2012

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 659 Issue: 1 Pages: 399-402 Published: DEC 11 2011

Eu-doped (LiF)-Li-6-SrF2 eutectic scintillators for neutron detection

Performance test of Si PIN photodiode line scanner for thermal neutron detection

T Yanagida , K Fukuda , Y Fujimoto , N Kawaguchi , S Kurosawa , A Yamazaki , K Watanabe , Y Futami , Y

D Totsuka , T Yanagida , K Fukuda , N Kawaguchi , Y Fujimoto , J Pejchal , Y Yokota , A Yoshikawa

Yokota , J Pejchal , A Yoshikawa , A Uritani , T Iguchi

JOURNAL OF PHYSICS D-APPLIED PHYSICS Volume: 44 Issue: 50 Article Number: 505104 Published: DEC 21 2011

Scintillator-oriented combinatorial search in Ce-doped (Y,Gd)(3)(Ga,Al)(5)O-12
multicomponent garnet compounds
K Kamada , T Yanagida , J Pejchal , M Nikl , T Endo , K Tsutumi , Y Fujimoto , A Fukabori , A Yoshikawa

50.

JOURNAL OF INSTRUMENTATION Volume: 7 Article Number: C03013 Published: MAR 2012

Development of a new imaging device using a VUV scintillator and a gas
photomultiplier with a mu-PIC and GEM
S Kurosawa , K Taniue , H Sekiya , H Kubo , C Ida , K Miuchi , T Tanimori , T Yanagida , Y Yokota , A

44.

CRYSTAL GROWTH & DESIGN Volume: 12 Issue: 1 Pages: 142-146 Published: JAN 2012

Yoshikawa , K Fukuda , N Kawaguchi , S Ishizu , M Nakagawa , T Suyama, J Pejchal

Characterizations of Ce3+-Doped CaB2O4 Crystalline Scintillator
Y Fujimoto , T Yanagida , N Kawaguchi , S Kurosawa , K Fukuda , D Totsuka , K Watanabe , A Yamazaki , Y
Yokota , A Yoshikawa

45.

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS
DETECTORS AND ASSOCIATED EQUIPMENT Volume: 664 Issue: 1 Pages: 127-131 Published: FEB 1 2012

Crystal growth and scintillation properties of Er-doped Lu3Al5O12 single crystals
M Sugiyama , Y Fujimoto , T Yanagida , D Totsuka , S Kurosawa , Y Futami , Y Yokota , V Chani , A
Yoshikawa

46.

OPTICAL MATERIALS Volume: 34 Issue: 4 Pages: 627-631 Published: FEB 2012

Investigations of optical and scintillation properties of Tm3+-doped YAlO3
D Totsuka , T Yanagida , M Sugiyama , J Pejchal , Y Fujimoto , Y Yokota , A Yoshikawa

47.

OPTICAL MATERIALS Volume: 34 Issue: 4 Pages: 729-732 Published: FEB 2012

Crystal growth and scintillation properties of Ce-doped sodium calcium lutetium
complex fluoride
S Wakahara , Y Furuya , T Yanagida , Y Yokota , J Pejchal , M Sugiyama , N Kawaguchi , D Totsuka , A
Yoshikawa

48.

JAPANESE JOURNAL OF APPLIED PHYSICS Volume: 51 Issue: 2 Article Number: 022603 Published: FEB 2012

Optical Characteristic Improvement of Neodymium-Doped Lanthanum Fluoride
Thin Films Grown by Pulsed Laser Deposition for Vacuum Ultraviolet Application
M Ieda , T Ishimaru , S Ono , K Yamanoi , M Cadatal-Raduban , T Shimizu , N Sarukura , K Fukuda , T
Suyama , Y Yokota , T Yanagida , A Yoshikawa

78

79

Copies of Selected Papers

80

81

JOURNAL OF CERAMIC PROCESSING RESEARCH Volume: 12 Issue: 2 Pages: 169-172 Published: APR 2011

JOURNAL OF CRYSTAL GROWTH Volume: 320 Issue: 1 Pages: 63-68 Published: APR 1 2011

Crystal growth and thermal conductivity of an Tm3+-doped Y2O3 for IR eye-safe
laser

Crystal growth and characterization of (NaxCa1-2xLux)F-2 single crystals
Y Furuya 1, H Tanaka 1, K Fukuda 1,2, N Kawaguchi 1,2, Y Yokota 1, T Yanagida 1, V Chani 1, M Nikl 3,

JH. Mun 1, A. Jouini 2, A. Novoselov 3, A. Yoshikawa 3, T. Fukuda 3

A Yoshikawa 1,4
1. Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. Tokuyama Co Ltd, Div Res & Dev, Aoba Ku, Sendai, Miyagi, Japan
3. Acad Sci Czech Republic, Inst Phys, CR-16200 Prague 6, Czech Republic
4. New Ind Creat Hatchery Ctr NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan

1. Gyeongbuk Hybrid Technol Inst, Yeongcheon 770170, Gyeongbuk, South Korea
2. Univ Lyon 1, CNRS, UMR 5620, F-69622 Villeurbanne, France
3. Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan

Abstract:
Refractory undoped and Tm3+-doped (0.15, 1, 3 and 5 mol. /0) Y2O3 single crystals were grown by
the micro-pulling-down method. Chemical analysis showed a homogeneous distribution of Tm3+
dopant along the crystal rod. The dependence of thermal conductivity on Tm3+ concentration in
Tm3+:Y2O3 was characterized. The value decreases when the Tm3+ concentration increases in thehost but still stays high enough (7.46 Wm(-1)K(-1)) when doped with Tm3+ (5 mol.%), which
represents a promising material for an infrared eye-safe laser application.
E-mail Address:
jhmun@ghi.re.kr
Site Address:
http://jcpr.kbs-lab.co.kr/thesis/online_2.php?cate_idx=5&sub_cate_idx=15

Abstract:(NaxCa1-2xLux)F-2 (x=1/6, 1/4, 1/3) and (NaxCa1-x-yLuy-0.05Ce0.05)F2+y-x (x=0.32, y=0.43)
single crystals were grown from the melt using the precise atmosphere controlled type
Micro-Pulling-Down (mu-PD) method to investigate their potential as a host material of scintillators.
The grown crystals were of single-phase with fluorite-type structure (Fm-3m, Z=4) as confirmed by
XRD. The crystals demonstrated 60-90% transmittance above 200 nm wavelength and theirabsorption edges were approximately 145-155 nm. Their densities were 4.5-5.3 g/cm(3), and theireffective atomic numbers were 56.7-61.4. Ce doped sample demonstrated better scintillation
properties compared to Ce doped CaF2, such as higher light yield and shorter decay time. (C) 2011
Elsevier B.V. All rights reserved.
E-mail Address:
f.yuki@mail.tagen.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S0022024811001722

82

83

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERSOPTICAL MATERIALS Volume: 33 Issue: 6 Pages: 877-881 Published: APR 2011

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 634 Issue: 1 Pages: 59-63 Published: APR 1 2011

Time- and wavelength-resolved luminescence evaluation of several types ofscintillators using streak camera system equipped with pulsed X-ray source

Crystal growth and thermal neutron scintillation response of Ce doped(KLiYF5)-Li-6
Y Furuya 1, H Tanaka 1, N Kawaguchi 1,2, T Yanagida 1, Y Yokota 1, A Yamazaki, 3, K Watanabe 3, A Yoshikawa 1,4
1. Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. Tokuyama Co Ltd, Div Res & Dev, Aoba Ku, Sendai, Miyagi, Japan
3. Nagoya Univ, Dept Quantum Engn, Nagoya, Aichi 4648603, Japan
4. New Ind Creat Hatchery Ctr NICHe, Aoba Ku, Sendai, Miyagi 9808579, JapanY Furuya 1, T Yanagida 1, Y Fujimoto 1, Y Yokota 1, K Kamada 1, N Kawaguchi 1,2, S Ishizu 2, K Uchiyama 3,
K Mori 3, K Kitano 4, M Nikl 5, A Yoshikawa 1,6
1. Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. Tokuyama Soda Co Ltd, Div Res & Dev, Aoba Ku, Sendai, Miyagi, Japan
3. Hamamatsu Photon KK, Naka Ku, Shizuoka 4308587, Japan
4. Vacuum & Opt Instruments, Ota Ku, Tokyo 1460092, Japan
5. Inst Phys ASCR, Prague 16253 6, Czech Republic
6. Tohoku Univ, NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan

Abstract:
To design new scintillating materials, it is very important to understand detailed information about
the events, which occurred during the excitation and emission processes under the ionizing radiation
excitation. We developed a streak camera system equipped with picosecond pulsed X-ray source toobserve time- and wavelength-resolved scintillation events. In this report, we test the performance of
this new system using several types of scintillators including bulk oxide/halide crystals, transparent
ceramics, plastics and powders. For all samples, the results were consistent with those reported
previously. The results demonstrated that the developed system is suitable for evaluation of thescintillation properties. (C) 2011 Elsevier B.V. All rights reserved.

Abstract:(KLi)-Li-6(V1-xCex)F-5(x = 0.003, 0.02) single crystals were grown from the melt using the
precise atmosphere control type Micro-Pulling-Down (mu-PD) method to examine their potential asa new thermal neutron scintillators. The grown crystals were single-phase materials as confirmed by
XRD. The crystals demonstrated 40-60% transmittance above 320 nm and Ce3+ 5d-4f luminescenceobserved around 340 nm when exited by a-ray. The radio luminescence measurements under thermal
neutron excitation (Cf-252) demonstrated the light yield of 890 (Ph/neutron) and the decay time
excited by alpha-ray exhibited 20 and 259 ns.(C) 2011 Elsevier B.V. All rights reserved.
E-mail Address:
f.yuki@mail.tagen.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S0925346711000334

E-mail Address:
f.yuki@mail.tagen.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S016890021003055X

84

85

OPTICAL MATERIALS Volume: 33 Issue: 6 Pages: 905-908 Published: APR 2011

OPTICAL MATERIALS Volume: 33 Issue: 6 Pages: 924-927 Published: APR 2011

Crystal growth and scintillation properties of Nd-doped Lu3Al5O12 single crystals
with different Nd concentrations

Crystal growth and scintillation characteristics of the Nd3+ doped LiLuF4 single
crystals

M Sugiyama 1, Y Fujimoto 1, T Yanagida 1, Y Yokota 1, J Pejchal 1,2, Y Furuya 1, H Tanaka 1, A Yoshikawa 1,3

K Fukuda 1,2, N Kawaguchi 1,2, S Ishizu 2, T Nagami 2, T Suyama 2, T Yanagida 1, Y Yokota 1, M Nikl 3,

1. Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. Inst Phys AS CR, Prague 16253, Czech Republic
3. New Ind Creat Hatchery Ctr NICHe, Aoba Ku, Sendai, Miyagi 9808579, JapanA Yoshikawa 1,4
1. Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. Tokuyama Corp, Shibuya Ku, Tokyo 1508383, Japan
3. Inst Phys AS CR, VVI, Prague 16253, Czech Republic
4. Tohoku Univ, New Ind Creat Hatchery Ctr NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan

Abstract:
Nd 0.1%, 0.5%, 1% and 3% doped Lu3Al5O12 (Nd:LuAG) single crystals were grown in thenitrogen atmosphere by the micro-pulling down (mu-PD) method. The grown crystals had asingle-phase confirmed by powder XRD analysis. In absorption spectra, some weak absorption lines
due to Nd3+ 4f-4f transitions were observed and their intensity increased with the increase of Nd
concentration. When excited by Am-241 alpha-ray, a broad emission peak due to defects in the hostlattice at 320 nm and some sharp lines due to Nd3+ 4f-4f transitions at wavelength longer than 400
nm were observed. The decay time profiles of Nd:LuAG under gamma-ray excitation were wellapproximated by two exponential function of 340-760 ns and 3-5 mu s for each sample. By pulse
height measurement using Cs-137, Nd 0.5%:LuAG showed the highest light yield of 7600 +/- 760
photons/MeV. (C) 2011 Elsevier B.V. All rights reserved.
E-mail Address:
sugiyama@mail.tagen.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S0925346711000619

Abstract:
Sixty millimeter diameter single crystal of Ne doped LiLuF4 was successfully growh by the
Czochralski technique. No remarkable absorption due to unfavorable impurities was observed fromoptical absorption measurements in the vacuum ultra-violet spectral region. The high crystallinity
and homogeneous luminescence characteristics were found from X-ray rocking curve andcathode-ray luminescence respectively. X-ray excited luminescence spectrum was measured and thesignificant 4f(2)5d-4f(3) luminescence at 182 nm was observed in the grown crystal. The pulse
height spectrum was taken upon gamma-ray irradiation. As a result, the grown crystals demonstrated
sufficient response to the gamma-ray showing the light yield of 420 +/- 30 photons/MeV. The decay
curve under alpha-ray irradiation was also investigated and described by two component decay
kinetics which consists of the decay constants of 34 and 450 ns. (C) 2011 Elsevier B.V. All rights
reserved.
E-mail Address:
ken-fukuda@tokuyama.co.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S092534671100019X

86

87

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 635 Issue: 1 Pages: 53-56 Published: APR 11 2011

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 633 Supplement: 1 Pages: S36-S39 Published: MAY 2011

Comparative study of optical and scintillation(Lu0.5Y0.5)VO4, and LuVO4 single crystals

properties

of

YVO4,

Y Fujimoto 1, T Yanagida 1, Y Yokota 1, V Chani 1, VV Kochurikhin 3, A Yoshikawa 1,2
1. Tohoku Univ, IMRAM, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. Tohoku Univ, NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan
3. Inst Gen Phys, Moscow 119991, Russia

A new imaging device based on UV scintillators and a large area gas
photomultiplier
H Sekiya 1,2, C Ida 3, H Kubo 3, S Kurosawa 3, K Miuchi 3, T Tanimori 3, K Taniue 3, A Yoshikawa 4, T Yanagida 4,
Y Yokota 4, K Fukuda 5, S Ishizu 5, N Kawaguchi 5, T Suyama 5
1. Univ Tokyo, Kamioka Observ, Inst Cosm Ray Res, Gifu 5061205, Japan
2. Inst Phys & Math Universe, Gifu 5061205, Japan
3. Kyoto Univ, Grad Sch Sci, Dept Phys, Sakyo Ku, Kyoto 6068502, Japan
4. Tohoku Univ, Inst Multidisciplinary, Aoba Ku, Sendai, Miyagi 9808577, Japan
5. Tokuyama Corp, Shibuya Ku, Tokyo 1508383, Japan

Abstract:
Optical and scintillation properties of YVO4, (Lu0.5Y0.5)VO4, and LuVO4 single crystals grownby the Czochralski (CZ) method with RF heating system are compared. All vanadate crystals showhigh transmittance (similar to 80%) in the 400-900 nm wavelength range. In both photo- andradio-luminescence spectra, intense peak around 400-500 nm, which was ascribed to the transition
from triplet state of VO43-, was clearly observed. The main decay time component was about 38 mus (YVO4), 18 mu s ((Lu0.5Y0.5)VO4), and 17 mu s (LuVO4) under 340 nm excitation. The
scintillation light yields of YVO4. (Lu0.5Y0.5)VO4, and LuVO4 crystals (obtained from the Cs-137
excited pulse height spectra) were evaluated to be about 11,200, 10,700, and 10,300 ph/MeV,
respectively. (C) 2011 Elsevier B.V. All rights reserved.
E-mail Address:fuji-you@tagen.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S0168900211001227

Abstract:
A new type high spatial resolution radiation detector based on a UV scintillator+a UV imaging gas
photomultiplier is presented. The prototype UV detector consists of a 10 cm x 10 cm mu PIC, 2
GEMs and a semitransparent Csl photocathode deposited on a MgF2 window. The effective
photo-sensitive area is phi 34 mm and the readouts are 400 mu m pitch strips. A newly developed 20
mm size LaF3(Nd) crystal which emits 172 nm photons is coupled to the detector for the first step.
The detector was tested in pulse mode operation with 5.5 MeV alpha particles from Am-241. The
single photoelectrons were successfully detected and the images of the crystal shape were clearlyobtained. (C) 2010 Elsevier B.V. All rights reserved.
E-mail Address:
sekiya@icrr.u-tokyo.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S0168900210013045

88

89

CRYSTAL GROWTH & DESIGN Volume: 11 Issue: 6 Pages: 2404-2411 Published: JUN 2011

OPTICAL MATERIALS Volume: 33 Issue: 8 Pages: 1143-1146 Published: JUN 2011

Growth of Tm3+-Doped Y2O3, Sc2O3, and Lu2O3 Crystals by the Micropulling
down Technique and Their Optical and Scintillation Characteristics

Crystal growth and optical properties of the Nd3+ doped LuF3 single crystals
K Fukuda 1,2, S Ishizu 2, N Kawaguchi 1,2, T Suyama 2, T Yanagida 1, Y Yokota 1, M Nikl 3, A Yoshikawa 1,4
1. Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. Tokuyama Corp, Shibuya Ku, Tokyo 1508383, Japan
3. Inst Phys AS CR, Vvi, Prague 16253, Czech Republic
4. Tohoku Univ, New Ind Creat Hatchery Ctr NICHe, Aoba Ku, Sendai, Miyagi 9808579, JapanA Fukabori 1, V Chani 1, K Kamada 2, F Moretti 3, A Yoshikawa 1,4
1. Tohoku Univ, IMRAM, Aoba Ku, Sendai, Miyagi 9800812, Japan
2. Furukawa Co Ltd, Tsukuba, Ibaraki 3050856, Japan
3. Univ Milano Bicocca, Dipartimento Sci Mat, I-20125 Milan, Italy
4. Tohoku Univ, NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan

Abstract:
Abstract:

Thirty millimeter diameter single crystal of Nd3+ doped LuF3 was grown using LiF as solvent. The

Single -crystal growth of Tm3+-doped Y2O3, Sc2O3, and Lu2O3 sesquioxides, with a melting point

single phase crystallization was confirmed by the powder X-ray diffraction, and high structural

around 2400 degrees C, by the micropulling down technique is reported. Crystal quality andperfection was demonstrated by X-ray rocking curve (XRC) measurements. FWHM of XRC for 220

composition of the crystals were evaluated by rocking curve and energy-dispersive X-ray (EDX)

reflection was 32 arcsec. No remarkable absorption due to unfavorable impurities was observed fromanalyses, respectively. Optical properties including optical transmittance and photoluminescence

optical absorption measurements in the VUV spectral region. The crystal showed the VUVdecay profiles were also examined. Furthermore, scintillation performance of the crystals including

luminescence peaking around 178 nm that is consistent with the 4f(2)5d-4f(3) transition of Nd3+ ion.

pulse height spectra and radioluminescence spectra under alpha-ray and gamma-ray excitation was

The luminescence intensity of Nd:LuF3 under X-ray irradiation was significantly higher than that ofevaluated.

reported VUV scintillators such as Nd:LaF3 or Nd:LiLuF4. (C) 2011 Elsevier B.V. All rights
reserved.

E-mail Address:
fukabori@mail.tagen.tohoku.ac.jp

E-mail Address:

Site Address:

ken-fukuda@tokuyama.co.jp

http://pubs.acs.org/doi/abs/10.1021/cg200160q

Site Address:
http://www.sciencedirect.com/science/article/pii/S0925346711000206

90

91

OPTICAL MATERIALS Volume: 33 Issue: 8 Pages: 1243-1247 Published: JUN 2011

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS
DETECTORS AND ASSOCIATED EQUIPMENT Volume: 643 Issue: 1 Pages: 57-63 Published: JUL 1 2011

Basic study of Europium doped LiCaAlF6 scintillator and its capability forthermal neutron imaging application

The development and performance of UV-enhanced APD-arrays for highresolution PET imaging coupled with pixelized Pr:LuAG crystal

T Yanagida 1, N Kawaguchi 2,4, Y Fujimoto 4, K Fukuda 2, Y Yokota 4, A Yamazaki 3, K Watanabe 3, J Pejchal 4,5,
A Uritani 3, T Iguchi 3, A Yoshikawa 1,4
1. Tohoku Univ, New Ind Creat Hatchery Ctr NICHe, Sendai, Miyagi 9808579, Japan
2. Tokuyama Corp, Shibuya Ku, Tokyo 1508383, Japan
3. Nagoya Univ, Grad Sch Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan
4. Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan
5. Inst Phys AS CR, Prague 16200 6, Czech Republic

Abstract:
Eu2+ 0.1, 0.5, 1, and 2 mol% doped LiCaAlF6 single crystalline scintillators were grown by the
micro-pulling down (mu-PD) method. Eu2+ 2 mol% doped LiCaAlF6 was also prepared using the
Czochralski method. In the transmittance spectra, 4f-5d absorption lines appeared around 200-220
and 290-350 nm. An intense emission at 375 nm due to Eu2+ 5d-4f transition was observed under
Am-241 alpha-ray excitation. When Cf-252 excited pulse height spectra were measured, Eu 2%
doped one showed the highest light yield of 29,000 ph/n with 1.15 mu s decay time. Using the 2 inch
phi Czochralski grown one coupled with the position sensitive photomultiplier tube covered by Cd
mask with various size (1, 2, 3, and 5 mm) pin holes, thermal neutron imaging was examined. As aresult, the spatial resolution turned out to be better than 1 mm. (C) 2011 Elsevier B.V. All rights
reserved.
E-mail Address:t_yanagi@tagen.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S0925346711000760

M Yoshino 1, J Kataoka 1, T Nakamori 1, H Matsuda 1, T Miura 1, T Katou 1, Y Ishikawa 2, N Kawabata 2,
Y Matsunaga 2, K Kamada 3, Y Usuki 3, A Yoshikawa 4, T Yanagida 4
1. Waseda Univ, Res Inst Sci & Engn, Shinjuku Ku, Tokyo, Japan
2. Hamamatsu Photon KK, Div Solid State, Shizuoka, Japan
3. Furukawa Co Ltd, Mat Res Lab, Tsukuba, Ibaraki 3050856, Japan
4. Tohoku Univ, IMRAM, Aoba Ku, Sendai, Miyagi 9808577, Japan

Abstract:
The development of high-resolution, UV-enhanced avalanche photodiode (APD) arrays usable inhigh-resolution PET imaging is underway. These APD arrays were specifically designed as
photosensors capable of direct coupling with pixelized Pr-doped Lu3Al5O12 (Pr:LuAG) scintillators.
An excellent quantum efficiency (QE) of 55% was achieved at the peak emission of Pr:LuAG (310nm), namely, a substantial improvement from the QE <= 5% as measured with the conventional
Hamamatsu reverse-type APDs (S8664 series). Each APD device has 8 x 8 (TYP1) and 12 x 12
(TYP2) pixel structures with active areas of 3 x 3 mm(2) and 2 x 2 mm(2) in each pixel, respectively.
A gain uniformity of +/- 8% and low dark noise of <= 2 nA/pixel have been achieved, measured at+25 degrees C. We also report on the large size single crystal growth of improved Pr:LuAG
scintillators and the preliminary performance test of the same. An energy resolution of 4.2%
(FWHM) was obtained for 662 key gamma-rays for 10 x 10 x 10 mm(3) crystal, measured with a
PMT employing a super-bialkali photocathode. We made a test module consisting of a UV-enhanced
APD-array (either TYP1 or TYP2) optically coupled with an 8 x 8 (or 12 x 12) pixel Pr:LuAG
matrix. The linearity between the output signals and incident gamma-ray energy of TYP1 and TYP2
gamma-ray detectors were only 0.27 and 0.33%, as measured at +25 degrees C for various
gamma-ray sources, respectively. Energy resolutions of 7.0 +/- 0.2% (FWHM) and 9.0 +/- 0.6%
(FWHM) were, respectively, obtained for TYP1 and TYP2 detector arrays for 662 keV gamma-rays.
The uniformity of the pulse height distributions was also measured at less than 8% for both detectors.
Finally, we measured the coincidence timing resolution of these gamma-ray detectors and obtained
4.0 +/- 0.1 ns (FWHM) for the 511 key annihilation quanta from a Na-22 source. These results
suggest that UV-enhanced APD-arrays coupled with Pr:LuAG scintillators could be a promising
device for future application in nuclear medicine. (C) 2011 Elsevier B.V. All rights reserved.
E-mail Address:
m4f2e7a8@asagi.waseda.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S0168900211006814

92

93

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS

JAPANESE JOURNAL OF APPLIED PHYSICS Volume: 50 Issue: 9 Article Number: 090207 Published: SEP 2011

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 643 Issue: 1 Pages: 64-68 Published: JUL 1 2011

Crystal growth and scintillation properties of Pr-doped oxyorthosilicate fordifferent concentration

Absence of Host Cation Segregation in the (Gd,Y)(3)Al5O12 Mixed Garnet Optical
Ceramics
G Boulon 1,2, T Epicier 3, W Zhao 1,4, VI Chani 2, T Yanagida 5, A Yoshikawa 2,5
1. Univ Lyon 1, CNRS, UMR 5620, F-69622 Villeurbanne, France
2. Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan
3. Univ Lyon, INSA Lyon, CNRS, Mat Ingn & Sci MATEIS,UMR 5510, F-69621 Villeurbanne, France
4. Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
5. Tohoku Univ, New Ind Creat Hatchery Ctr, Sendai, Miyagi 9808579, Japan

D Totsuka 1,2, T Yanagida 4, Y Fujimoto 1, J Pejchal 1,3, Y Yokota 1, A Yoshikawa 1,4
1. Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. Nihon Kessho Kogaku Co Ltd, Sendai, Miyagi, Japan
3. Inst Phys AS CR, Prague 16253 6, Czech Republic
4. New Ind Creat Hatchery Ctr NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan

Abstract:
0.05, 0.1 and 0.25 mol% Pr (with respect to Lu) doped Lu(2)SiO(5) (LSO) single crystals weregrown by the micro-pulling down (mu-PD) method. The grown crystals were transparent, and aslight segregation of Pr(3+) was observed both in the crystal cross-section and growth direction.
Transparency in the visible wavelength range was about 80% in all the crystals. Intense absorptions
related with the Pr(3+) 4f-5d transitions were observed around 230 and 255 nm, and weakabsorptions due to the 4f-4f transitions were detected around 450 nm. In radioluminescence spectra,
the Pr(3+) 5d-4f transitions were observed around 275and 310 nm, and emissions due to the 4f-4ftransition were observed around 500 nm. In the pulse height analysis using (137)Cs gamma-ray
excitation, Pr 0.1% doped sample showed the highest light yield of 2,800 ph/MeV. In the decay timemeasurements using different excitation sources (photoluminescence, X- and gamma-ray), twodifferent processes related to the 5d-4f emission peaks were found. Fast decay component
corresponds to direct excitation of Pr(3+) (4-6 ns) and slower component (25 ns) reflects the energy
migration process from the host lattice to the emission center. (C) 2011 Elsevier B.V. All rights
reserved.

Abstract:
Recently non-uniform distribution of dopants in transparent optical ceramics was observed. It wasdemonstrated that dopants with low segregation coefficients (K < 0.2) with respect to the melt
crystal growth are segregated to the grain boundaries when the grains of the ceramics are developed.
This communication discusses segregation of host cations that form crystal matrix. Experimental
examination of spatial distribution of Gd3+ and Y3+ host cations in Ce3+-doped (Gd, Y)(3)Al5O12
ceramic sample demonstrated that no detectable redistribution of Gd3+ and Y3+ cations in thevicinity of the grain boundaries was detected. These results are in good agreement with comparable
segregation behavior of Gd3+ and Y3+ [K(Y3+ approximate to K(Gd3+] when the garnet
solidification is performed from liquid phase. This observation also confirms qualitative match ofsegregation in liquid and solid states. (C) 2011 The Japan Society of Applied Physics
E-mail Address:
georges.boulon@univ-lyon1.fr
Site Address:
http://jjap.jsap.jp/link?JJAP/50/090207/

E-mail Address:
totsuka@mail.tagen.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S0168900211007054

94

95

JAPANESE JOURNAL OF APPLIED PHYSICS Volume: 50 Issue: 9 Special Issue: SI Article Number: 09ND03 Published: SEP

OPTICAL MATERIALS Volume: 33 Issue: 11 Pages: 1638-1642 Published: SEP 2011

2011

Growth of Shape-Controlled Ca3NbGa3Si2O14 and Sr3NbGa3Si2O14 Single
Crystals by Micro-Pulling-Down Method and Their Physical Properties

Monophase domain, fibers single crystals grown by the micro-pulling down
technique and optical characterisation of LiGd1-xYbx(WO4)(2)
B Rekik 3, M Derbal 3, L Guerbous 4, D Ouadjaout 5, A Nehari 1, E Romeo, 1, A Brenier 1, A Yoshikawa 2, K Lebbou 1
1. Univ Lyon 1, CNRS, UMR 5620, LPCML, F-69622 Villeurbanne, France
2. Tohoku Univ, IMRAM, Aoba Ku, Sendai, Miyagi 9808577, Japan
3. Saad Dahlab Univ, Dept Phys, LASICOM, Blida, Algeria
4. CRNA, Rp Alger 16000, Algeria
5. UDTS, Algiers 16200, Algeria

Y Yokota 1, M Sato 1,2, K Tota 2, Y Futami 3, T Yanagida 3, K Onodera 2, A Yoshikawa 1,3
1. Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
2. TDK Corp, Akita 0180193, Japan
3. Tohoku Univ, New Ind Creat Hatchery Ctr, Sendai, Miyagi 9808579, Japan

Abstract:
Shape-controlled langasite-type piezoelectric single crystals, Ca3NbGa3Si2O14 (CNGS) andSr3NbGa3Si2O14 (SNGS), were grown by the micro-pulling-down (mu-PD) method and their
physical properties were investigated. Columnar-shaped CNGS and SNGS crystals with a-and c-axes
in the growth direction were grown and the diameters of the grown columnar-shaped crystals were
controlled to be approximately 3mm from the initial to the later part. The grown crystals without
cracks indicated relatively high crystallinities and a single phase of the langasite-type structure in the
powder X-ray diffraction patterns. Meanwhile, in the outside area of the crystals, parts of second
phases were detected and energy dispersive X-ray spectroscopy measurements indicated that thesecond phases of the CNGS and SNGS crystals were the Ca-Nb-O and Sr-Nb-O systems,
respectively. The d(11) of the CNGS crystal indicated 3.98 pC/N, which was coincident with thoseof previous reports. (C) 2011 The Japan Society of Applied Physics
Site Address:
http://jjap.jsap.jp/link?JJAP/50/09ND03/

Abstract:
We have determined the single phase domain of LiGd1-xYbx(WO4)(2). The lattices parameters
decrease as a function of Yb3+ substitution in Gd' sites. Transparent LiGd(1-x)Ab(x)(WO4)(2)
fibers single crystals were successfully grown by the micro-pulling down technique (mu-PD). The
Yb3+-doped LiGd(WO4)(2) fibers single crystals have been pulled under stationary stable growth
conditions corresponding to flat crystallization interface with meniscus length equal to 120 mu m.
The fibers diameters varied from 0.5 to 1 mm depending on the capillary die diameter, pulling rate
and the molten zone temperature. Fibers single crystals free of defects are observed for Ytterbium
concentration in the melt up to 5 at%. Above this limit, inclusions and cracks appear and the opticalquality of the fibers were deteriorated. The emission spectra of Yb3+-doped LiGd(WO4)(2) were
investigated. (C) 2011 Elsevier B.V. All rights reserved.
E-mail Address:
kheirreddine.lebbou@univ-lyon1.fr
Site Address:
http://www.sciencedirect.com/science/article/pii/S0925346711002333

96

97

APPLIED PHYSICS EXPRESS Volume: 4 Issue: 10 Article Number: 106401 Published: OCT 2011

CRYSTAL GROWTH & DESIGN Volume: 11 Issue: 10 Pages: 4484-4490 Published: OCT 2011

Europium and Sodium Codoped LiCaAlF6 Scintillator for Neutron Detection

Composition
Engineering
Single-Crystal Scintillatorsin

Cerium-Doped(Lu,Gd)(3)(Ga,Al)(5)O-12

T Yanagida 1, A Yamaji 4, N Kawaguchi 2,4, Y Fujimoto 4, K Fukuda 2, S Kurosawa 4, A Yamazaki 3, K Watanabe 3,
Y Futami 4, Y Yokota 4, A Uritani 3, T Iguchi 3, A Yoshikawa 1,4, M Nikl 5

K Kamada 1, T Endo 1, K Tsutumi 1, T Yanagida 2, Y Fujimoto 2, A Fukabori 2, A Yoshikawa 2,3, J Pejchal 4, M Nikl 4

1. Tohoku Univ, New Ind Creat Hatchery Ctr NICHe, Sendai, Miyagi 9808579, Japan
2. Tokuyama Corp, Shibuya Ku, Tokyo 1508383, Japan
3. Nagoya Univ, Grad Sch Engn, Nagoya, Aichi 4648603, Japan
4. Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
5. Inst Phys AS CR, Prague 16200 6, Czech Republic

Abstract:
A recent study has revealed that a Eu-doped LiCaAlF6 (Eu:LiCAF) crystalline scintillator showed
good scintillation response under thermal neutron exposure. We discover here that Eu and Na
codoped LiCAF exhibits superior scintillation properties to Eu: LiCAF. We grew Eu 2% and Na 0.5,
1, and 2% codoped LiCAF by the micropulling down method. In radioluminescence spectra, they
showed intense emission peaking at 370nm due to Eu2+ 5d-4f transition. In particular, the light yieldof Eu 2% Na 2%-doped LiCAF reached 40000 ph/n, which was about 30% higher than that of Eu:
LiCAF. (C) 2011 The Japan Society of Applied Physics
E-mail Address:
yanagida@imr.tohoku.ac.jp
Site Address:
http://apex.jsap.jp/link?APEX/4/106401/

1. Furukawa Co Ltd, Mat Res Lab, Tsukuba, Ibaraki 3050856, Japan
2. Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan
3. Tohoku Univ, New Ind Creat Hatchery Ctr NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan
4. Acad Sci Czech Republic, Inst Phys, Prague 16253, Czech Republic

Abstract:
The Ce-doped (LuyGd1-x)(3)(Ga-y,Al1-y)(s)O-12 single crystals were grown by the micropulling
down method. Their structure and chemical composition were checked by X-ray diffraction (XRD)
and electron probe microanalysis (EPMA) techniques. Optical, luminescent, and scintillation
characteristics were measured by the methods of time-resolved luminescence spectroscopy,
including the light yield and scintillation decay. Balanced Gd and Ga admixture into the Lu3Al5O12
structure provided an excellent scintillator where the effect of shallow traps was suppressed, thespectrally corrected light yield value exceeded 40 000 photons/MeV, and scintillation decay was
dominated by a 53 ns decay time value which is close to that of Ce3+ photoluminescence decay.
This study provides an excellent example of a combinatorial approach where targeted single-crystal
compositions are obtained by a flexible, time saving, and cost-effective crystal growth technique.
E-mail Address:
k-kamada@furukawakk.co.jp
Site Address:
http://pubs.acs.org/doi/abs/10.1021/cg200694a

98

99

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 652 Issue: 1 Pages: 251-255 Published: OCT 1 2011

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 652 Issue: 1 Pages: 256-259 Published: OCT 1 2011

Scintillation properties of Ce-doped LuLiF4 and LuScBO3

Basic study of single crystal fibers of Pr:Lu3Al5O12 scintillator for gamma-ray
imaging applications

T Yanagida 1, Y Fujimoto 1, N Kawaguchi 1,3, Y Yokota 1, K Kamada 2, D Totsuka 4, SI Hatamoto 5, A Yoshikawa 1,
V Chani 1

T Yanagida 1, K Kamada 2, N Kawaguchi 1,3, Y Fujimoto 1, K Fukuda 1,3, Y Yokota 1, V Chani 1, A Yoshikawa 1
1. Tohoku Univ, IMRAM, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. Furukawa Co Ltd, Mat Res Lab, Tsukuba, Ibaragi 3050856, Japan
3. Tokuyama Corp, Shibuya Ku, Tokyo 1508383, Japan
4. Nihon Kessho Kogaku Co Ltd, Gunma 3740047, Japan
5. Mitsui Min & Smelting Co Ltd, Corp Res & Dev Ctr, Ageo Saitama 3620023, Japan

Abstract:
The crystals of 1 mol% Ce-doped LuLiF4 (Ce:LLF) grown by the micro-pulling down (mu-PD)
method and 1 mol% Ce-doped LuScBO3 (Ce:LSBO) grown by the conventional Czochralski (Cz)method were examined for their scintillation properties. Ce:LLF and Ce:LSBO demonstrated similar
to 80% transparency at wavelengths longer than 300 and 400 nm, respectively. When excited by
Am-241 alpha-ray to obtain radioactive luminescence spectra, Ce3+ 5d-4f emission peaks weredetected at around 320 nm for Ce:LLF and at around 380 nm for Ce:LSBO. In Ce:LSBO, the hostluminescence was also observed at 260 nm. By recording pulse height spectra under gamma-ray
irradiation, the absolute light yield of Ce:LLF and Ce:LSBO was measured to be 3600 +/- 400 and
4200 +/- 400 ph/MeV, respectively. Decay time kinetics was also investigated using a pulse X-ray
equipped streak camera system. The main component of Ce:LLF was similar to 320 ns and that of
Ce:LSBO was similar to 31 ns. In addition, the light yield non-proportionality and energy resolution
against the gamma-ray energy were evaluated. (C) 2010 Elsevier B.V. All rights reserved.
E-mail Address:t_yanagi@tagen.tohoku.ac.jp
Site Address:

1. Tohoku Univ, IMRAM, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. Furukawa Co Ltd, Mat Res Lab, Tukuba Ibaragi 3050856, Japan
3. Tokuyama Corp, Shibuya Ku, Tokyo 1508383, Japan

Abstract:
Single-crystalline fibers were grown from 0.25, 0.70, and 1.50 mol% Pr-doped Lu3Al5O12 (LuAG)
melts by the micro-pulling down (mu-PD) method with a diameter of 0.3-0.5 mm and a length ofabout 200 mm. They were cut to 10 mm long specimens, and their scintillation properties, including
light yield and decay time profile, were examined. These results were compared with corresponding
properties of the specimens (0.8 x 0.8 x 10 mm(3)) cut from the bulk crystals produced byconventional Czochralski (CZ) growth. The mu-PD-grown fibers demonstrated relatively low lightyield and had the same decay time constant when compared with those of the samples cut from theCZ-grown crystals. The fiber crystals were used to assemble scintillating arrays with dimensions ofempty set 0.5 mm(2) x 20 pixels and empty set 0.3 x 10 mm(2) x 30 pixels coated by a BaSO4
reflector. After optical coupling with a position sensitive photomultiplier tube, the fiber-based arrays
demonstrated acceptable imaging capability with a spatial resolution of about 0.5 mm. (C) 2010
Elsevier B.V. All rights reserved.
E-mail Address:t_yanagi@tagen.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S0168900210019029

http://www.sciencedirect.com/science/article/pii/S0168900210019030

100

101

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 652 Issue: 1 Pages: 319-322 Published: OCT 1 2011

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 652 Issue: 1 Pages: 351-354 Published: OCT 1 2011

Thermal neutron detection with Ce3+ doped LiCaAlF6 single crystals

Thermal neutron imaging with rare-earth-ion-doped LiCaAlF6 scintillators and asealed Cf-252 source

J Iwanowska 1, L Swiderski 1, M Moszynski 1, T Yanagida 2, Y Yokota 2, A Yoshikawa 2, K Fukuda 3, N Kawaguchi 3,
S Ishizu 3

N Kawaguchi 1,2, T Yanagida 2, Y Fujimoto 2, Y Yokota 2, K Kamada 2, K Fukuda 1, T Suyama 1, K Watanabe 3,
1. Soltan Inst Nucl Studies, PL-05400 Otwock, Poland
2. Tohoku Univ, IMRAM, Aoba Ku, Sendai, Miyagi 9808577, Japan
3. Tokuyama Corp, Aoba Ku, Sendai, Miyagi 9893204, Japan

A Yamazaki 3, V Chani 2, A Yoshikawa 2,4
1. Tokuyama Corp, Shibuya Ku, Tokyo 1508383, Japan
2. Tohoku Univ, IMRAM, Aoba Ku, Sendai, Miyagi 9808577, Japan
3. Nagoya Univ, Chikusa Ku, Nagoya, Aichi 4648603, Japan
4. Tohoku Univ, New Ind Creat Hatchery Ctr, Sendai, Miyagi 9808579, Japan

Abstract:
Cerium-doped LiCaAlF6 (Ce:LiCAF) crystals have been studied as scintillators in application tothermal neutron detection. Three crystals: high-doping Ce:LiCAF, low-doping Ce:LiCAF with 50%
enrichment of Li-6 (both 10 mm x 10 mm x 2 mm, rectangular) and high-doping Ce:LiCAF with
95% enrichment of Li-6 (050.8 mm x 2 mm, discus) coupled to Photonis XP5300B PMT, were
tested. The response of these crystals to neutrons emitted from a paraffin moderated (PuBe)-Pu-238
source has been investigated. Thermal neutron peaks have been found at a Gamma Equivalent
Energy (GEE) of similar to 2.5 MeV for high-doping Ce:LiCAF (50% 6Li), similar to 2 MeV for
low-doping Ce:LiCAF (50% Li-6) and similar to 1.9 MeV for high-doping Ce:LiCAF (95% Li-6).
The light output of Ce:LiCAF was also measured (175-250 phe/MeV from sample to sample).
Lithium-6 glass GS20 from Saint Gobain was used as a reference scintillator (050 mm x 2 mm,circle). Relative neutron efficiency, normalized to that of GS20 lithium glass, as well as
gamma-neutron intrinsic efficiency for all tested samples was calculated. Intrinsic efficiency onthermal neutron detection for small Ce:LiCAF samples was estimated at about 32-35% of that ofGS20 and for large Ce:LiCAF sample as about 82% of that of GS20. (C) 2011 Elsevier B.V. All

Abstract:
Thermal neutron imaging with Ce-doped LiCaAlF6 crystals has been performed. The prototype ofthe neutron imager using a Ce-doped LiCaAlF6 scintillating crystal and a position sensitive
photomultiplier tube (PSPMT) which had 64 multi-channel anode was developed. The Ce-doped
LiCaAlF6 single crystal was grown by the Czochralski method. A plate with dimensions of adiameter of 50 x 2 mm(2) was cut from the grown crystal, polished, and optically coupled to PSPMT
by silicone grease. The Cf-252 source ( <1 MBq) was sealed with 43 mm of polyethylene forneutron thermalization. Alphabet-shaped Cd pieces with a thickness of 2 mm were used as a mask
for the thermal neutrons. After corrections for the pedestals and gain of each pixel, we successfully
obtained two-dimensional neutron images using Ce-doped LiCaAlF6. (C) 2010 Elsevier B.V. All
rights reserved.
E-mail Address:

rights reserved.

famicom@mail.tagen.tohoku.ac.jp

E-mail Address:

http://www.sciencedirect.com/science/article/pii/S0168900210021893

Site Address:

j.iwanowska@ipj.gov.pl
Site Address:
http://www.sciencedirect.com/science/article/pii/S0168900211005018

102

103

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 652 Issue: 1 Pages: 435-438 Published: OCT 1 2011

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 652 Issue: 1 Pages: 209-211 Published: OCT 1 2011

Neutron-gamma discrimination based on pulse shape discrimination in a
Ce:LiCaAlF6 scintillator

Fabrication and characterization of large size (LiF)-Li-6/CaF2:Eu eutectic
composites with the ordered lamellar structure

A Yamazaki 1, K Watanabe 1, A Uritani 1, T Iguchi 2, N Kawaguchi 3, T Yanagida 4, Y Fujimoto 4, Y Yokota 4,

N Kawaguchi 1, K Fukuda 1, T Yanagida 2, Y Fujimoto 2, Y Yokota 2, T Suyama 1, K Watanabe 3, A Yamazaki 3,

K Kamada 4, K Fukuda 3, T Suyama 3, A Yoshikawa 4,5

A Yoshikawa 2,4

1. Nagoya Univ, Dept Mat Phys & Energy Engn, Grad Sch Engn, Nagoya, Aichi 4648601, Japan
2. Nagoya Univ, Dept Quantum Engn, Grad Sch Engn, Nagoya, Aichi 4648601, Japan
3. Tokuyama Corp, Tokuyama, Yamaguchi, Japan
4. Tohoku Univ, IMRAM, Sendai, Miyagi 980, Japan
5. Tohoku Univ, New Ind Creat Hatchery Ctr NICHe, Sendai, Miyagi 980, Japan

Abstract:
We demonstrate neutron-gamma discrimination based on a pulse shape discrimination method in a
Ce:LiCAF scintillator. We have tried neutron-gamma discrimination using a difference in the pulse
shape or the decay time of the scintillation light pulse. The decay time is converted into the rise timethrough an integrating circuit. A Cf-252 enclosed in a polyethylene container is used as the source ofthermal neutrons and prompt gamma-rays. Obvious separation of neutron and gamma-ray events isachieved using the information of the rise time of the scintillation light pulse. In the separated
neutron spectrum, the gamma-ray events are effectively suppressed with little loss of neutron events.
The pulse shape discrimination is confirmed to be useful to detect neutrons with the Ce:LiCAF
scintillator under an intense high-energy gamma-ray condition. (C) 2011 Elsevier B.V. All rights
reserved.
E-mail Address:

1. Tokuyama Corp, Tokyo 1508383, Japan
2. Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan
3. Nagoya Univ, Chikusa Ku, Nagoya, Aichi 4648603, Japan
4. Tohoku Univ, New Ind Creat Hatchery Ctr, Aoba Ku, Sendai, Miyagi 9808579, Japan

Abstract:
As alternative candidates for the He-3 neutron detectors, (LiF)-Li-6/CaF2:Eu eutectic composites
were fabricated and their scintillation properties were evaluated. Large size LiF/CaF2:Eu eutectic
composites of 58 mm diameter and 50 mm thickness were produced by Bridgman method. The
composites had a finely ordered lamellar structure along the solidification direction. The lamellar
structure was controlled by the direction and the rate of solidification, and it was optimized to
improve the scintillation properties. Better results were achieved when thinner lamellar layers werealigned along the scintillation light path. (C) 2011 Elsevier B.V. All rights reserved.
E-mail Address:
ken-fukuda@tokuyama.co.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S0168900211002877

a- a-yamazaki@nucl.nagoya-u.ac.jp
b- Site Address:
http://www.sciencedirect.com/science/article/pii/S0168900211004207

104

105

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS

CRYSTAL GROWTH & DESIGN Volume: 11 Issue: 11 Pages: 4775-4779 Published: NOV 2011

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 652 Issue: 1 Pages: 238-241 Published: OCT 1 2011

Scintillation and optical properties of Pb-doped YCa4O(BO3)(3) crystals

Crystal Growth of Na-Co-Doped Ce:LiCaAlF6 Single Crystals and Their Optical,
Scintillation, and Physical Properties

Y Fujimoto 1,2, T Yanagida 1, Y Yokota 1, N Kawaguchi 4, K Fukuda 1,4, D Totsuka 5, K Watanabe 6, A Yamazaki 6,

Y Yokota 1, Y Fujimoto 1, T Yanagida 2, H Takahashi 3, M Yonetani 4, K Hayashi 4, I Park 4, N Kawaguchi 1,5,

V Chani 1, A Yoshikawa 1,3

K Fukuda 5, A Yamaji 1, Y Fukazawa 4, M Nikl 6, A Yoshikawa 1,2

1. Tohoku Univ, IMRAM, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. JSPS, Chiyoda Ku, Tokyo 1028472, Japan
3. Tohoku Univ, NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan
4. Tokuyama Corp, Shibuya Ku, Tokyo 1508383, Japan
5. Nihon Kessho Kogaku Co Ltd, Gunma, Japan
6. Nagoya Univ, Chikusa Ku, Nagoya, Aichi 4648603, Japan

1. Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. Tohoku Univ, New Ind Creat Hatchery Ctr NICHe, Aoba Ku, Sendai, Miyagi 9808577, Japan
3. Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Hiroshima 7398530, Japan
4. Hiroshima Univ, Dept Phys Sci, Hiroshima 7398530, Japan
5. Tokuyama Corp, Chiyoda Ku, Tokyo 1008983, Japan
6. Acad Sci Czech Republic, Inst Phys, Prague 18221 8, Czech Republic

Abstract:

Abstract:

This communication reports optical properties and radiation responses of Pb2+ 0.5 and 1.0

We have grown Ce- and Na-co-doped LiCaAlF6 (Ce,Na:LiCAF) single crystals with various Ce andmol%-doped YCa4O(BO3)(3) (YCOB) single crystals grown by the micro-pulling-down (mu.-PD)

Na concentrations by the micro-pulling-down (mu-PD) method. Physical properties such as

method for neutron scintillator applications. The crystals had no impurity phases according to the

crystallinity, transmittance, photoluminescence, scintillation, and radiation resistance were

results of X-ray powder diffraction. These Pb2+-doped crystals demonstrated blue-light

investigated to evaluate the effects of charge compensation by Na co-doping in the Ce-doped

luminescence at 330 nm because of Pb2+ S-1(0)-P-3(0.1) transition in the photoluminescence

LiCaAlF6 (Ce:LiCAF) crystal. Ce2%:LiCAF, Ce1%Na1%:LiCAF, Ce1.5%Na1.5%:LiCAF, andspectra. The main emission decay component was determined to be about 250-260 ns under 260 nm

Ce2%Na2%:LiCAF crystals with no visible cracks and inclusions were prepared. The

excitation wavelength. When irradiated by a Cf-252 source, the relative light yield of 0.5%

Ce1%Na1%:LiCAF crystal showed high crystallinity comparable to the crystal grown by the

Pb2+-doped crystal was about 300 ph/n that was determined using the light yield of a reference

Czochralski method. In the transmittance and photoluminescence spectra of all crystals, an

Li-glass scintillator. (C) 2010 Elsevier B.V. All rights reserved.

absorption peak around 270 nm and emission peaks around 285 and 310 nm originating from Ce3+
ions were observed, respectively. With increasing Ce and Na concentrations, the light yieldE-mail Address:

systematically increased, and scintillation decay times decreased. Improvement of radiation

fuji-you@tagen.tohoku.ac.jp

resistance accomplished by charge compensation due to Na co-doping is clearly demonstrated.

Site Address:
http://www.sciencedirect.com/science/article/pii/S0168900210022850

E-mail Address:
yokota@imr.tohoku.ac.jp
Site Address:
http://pubs.acs.org/doi/abs/10.1021/cg200226f

106

107

OPTICAL MATERIALS Volume: 34 Issue: 1 Pages: 75-78 Published: NOV 2011

APPLIED PHYSICS EXPRESS Volume: 4 Issue: 12 Article Number: 126402 Published: DEC 2011

Crystal growth and scintillation properties of (NaxCa1-2xLux-yNdy)F-2 single
crystals

Ultrafast Transparent Ceramic Scintillators Using the Yb3+ Charge Transfer
Luminescence in RE2O3 Host

Y Furuya 1, S Wakahara 1, M Sugiyama 1, H Tanaka 1, K Fukuda 1,2, N Kawaguchi 1,2, Y Yokota 1, T Yanagida 3,

T Yanagida 1, Y Fujimoto 2, S Kurosawa 2, K Watanabe 4, H Yagi 3, T Yanagitani, 3, V Jary 5, Y Futami 2, Y Yokota 2,

A Yoshikawa 1,3

A Yoshikawa 1,2, A Uritani 4, T Iguchi 4, M Nikl 5
1. Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. Tokuyama Co Ltd, Div Res & Dev, Aoba Ku, Sendai, Miyagi, Japan
3. New Ind Creat Hatchery Ctr NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan

1. Tohoku Univ, New Ind Creat Hatchery Ctr NICHe, Sendai, Miyagi 9808579, Japan
2. Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
3. Konoshima Chem Co Ltd, Takuma, Kagawa 7691103, Japan
4. Nagoya Univ, Grad Sch Engn, Nagoya, Aichi 4648603, Japan
5. Inst Phys AS CR, Prague 16253, Czech Republic

Abstract:
NaxCa1-2xLux-yNdyF2 single crystals were grown from the melt using the precise atmosphere
control type Micro-Pulling-Down (mu-PD) method to investigate their potential as avacuum-ultraviolet (VUV) scintillators. The grown crystals were single-phase materials withfluorite-type structure (Fm-3m, Z = 4) as confirmed by XRD. The crystals demonstrated 80-90%transmittance above 200 nm wavelength and Nd3+ 5d-4f luminescence (when exited by X-ray)observed around 185 nm. The radioluminescence measurements under 5.5 MeV alpha-ray excitation(Am-241) demonstrated the light yield of 48 [Ph/5.5 MeV-alpha] and the decay time of 6.4-7.7 ns.
(C) 2011 Elsevier B.V. All rights reserved.
E-mail Address:yuki.furuya95@gmail.com
Site Address:
http://www.sciencedirect.com/science/article/pii/S0925346711003521

108

Abstract:
We report a new discovery of Yb3+-doped ultrafast scintillators based on the Yb3+ charge transfer
luminescence. Transparent ceramic Yb3+-doped Y2O3, Sc2O3, Lu2O3, and Yb2O3 were preparedby sintering. When irradiated by gamma- and X-rays, they showed a well detectable photoabsorption
peak in the pulse height spectra and ultrafast scintillation decay dominated by the decay time ofabout 1 ns. For the first time, the Yb3+-doped oxide materials show detectable scintillation in thepulse height measurement at room temperature with ultrafast scintillation decay. (C) 2011 The Japan
Society of Applied Physics
E-mail Address:
yanagida@imr.tohoku.ac.jp
Site Address:
http://apex.jsap.jp/link?APEX/4/126402/

109

OPTICAL MATERIALS Volume: 34 Issue: 2 Pages: 414-418 Published: DEC 2011

OPTICAL MATERIALS Volume: 34 Issue: 2 Pages: 439-443 Published: DEC 2011

Evaluations of pure and ytterbium doped transparent ceramic complex perovskite
scintillators

Scintillation properties of Tm-doped Lu3Al5O12 single crystals
M Sugiyama 1, Y Fujimoto 1, T Yanagida 2, D Totsuka 1,3, Y Yokota 1, A Yoshikawa 1,2
1. Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. New Ind Creat Hatchery Ctr NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan
3. Nihon Kessho Kogaku Co Ltd, Tatebayashi Gunma, JapanT Yanagida 1, Y Fujimoto 2, Y Yokota 2, A Yoshikawa 1,2, S Kuretake 3, Y Kintaka 3, N Tanaka 3, K Kageyama 3,
V Chani 2
1. Tohoku Univ, New Ind Creat Hatchery Ctr NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan
2. Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan
3. Murata Mfg Co Ltd, Kyoto 6178555, Japan

Abstract:
Using the micro-pulling-down (mu-PD) method, Tm-doped Lu3Al5O12 (Tm:LuAG) single crystals

Abstract:

were grown to examine their scintillation properties. In transmittance spectra, they exhibited about

Optical and scintillation properties of complex perovskite transparent ceramic scintillators of pure

80% transparency in the wavelengths longer than 320 nm and five absorption lines due to Tm3+

and Yb3+ doped Ba(ZrMgTa)O-3 and (LaSr)(AlTa)O-3 ceramics are reported. The materials were

4f-4f transitions were observed. Am-241 alpha-ray excited radioluminescence spectra were

produced by Murata Manufacturing. Their optical properties including transmittance andmeasured and intense 4f-4f emission peaks were observed with the host emission. When excited byphotoluminescence spectra were evaluated. The ceramics demonstrated high transparency (50-70%)

Cs-137 gamma-Ray to obtain pulse height spectra, Tm 1% doped LuAG showed the highest lightin visible wavelength region. Additionally, strong emission peaks were observed at 470 nm inyield coupled with a photomultiplier (PMT) or a silicon avalanche photodiode (Si-APD). The light

Ba(ZrMgTa)O-3 under 284 nm excitation and at 500 nm in (LaSr)(AlTa)O-3 under 324 nm

yield was estimated to be 5800 and 7300 photons/MeV for PMT and Si-APD, respectively. Decay

excitation. The photoluminescence decay times of Ba(ZrMgTa)O-3 and (LaSr)(AlTa)O-3 samples

time profiles consist of two exponential components and the fast and slow components are

were 14 and 16 mu s, respectively. Judging from these optical properties, Yb3+ emission was notconsidered to be attributed to the host and the combination of the host and Tm3+ 4f-4f emission,

observed in these materials. In radio luminescence spectra, all specimens exhibited the same

respectively. (C) 2011 Elsevier B.V. All rights reserved.

emission peaks with relatively higher emission intensity. Am-241 5.5 MeV alpha-ray induced pulse
height spectra of the samples were also measured, and (LaSr)(AlTa)O-3 demonstrated similar to 500

E-mail Address:

ph/5.5 MeV alpha with 10 mu s shaping time constant. (C) 2011 Elsevier B.V. All rights reserved.

sugiyama@mail.tagen.tohoku.ac.jp
Site Address:

E-mail Address:

http://www.sciencedirect.com/science/article/pii/S0925346711002680

t_yanagi@tagen.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S0925346711002187

110

111

OPTICAL MATERIALS Volume: 34 Issue: 2 Pages: 444-447 Published: DEC 2011

OPTICAL MATERIALS Volume: 34 Issue: 2 Pages: 448-451 Published: DEC 2011

Growth and characterization of strontium metaborate scintillators

Evaluation of characterization of rare-earth doped sesquioxide ceramic
scintillators

Y Fujimoto 1, T Yanagida 2, Y Yokota 1, N Kawaguchi 3, K Fukuda 3, D Totsuka 4, K Watanabe 5, A Yamazaki 5,
A Yoshikawa 1,2

Y Fujimoto 1, T Yanagida 1, Y Yokota 1, A Ikesue 3, A Yoshikawa 1,2
1. Tohoku Univ, IMRAM, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. Tohoku Univ, NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan
3. TOKUYAMA Corp, Tokyo 1508383, Japan
4. NIHON KESSHO KOGAKU CO LTD, Tokyo, Japan
5. Nagoya Univ, Chikusa Ku, Nagoya, Aichi 4648603, Japan

Abstract:
The undoped and 0.5% Ce(3+)-doped strontium metaborate SrB(2)O(4) single crystals has beengrown successfully by micro-pulling down method with radio frequency (RF) heating system, andscintillation characteristics including optical properties and radiation response were studied for thesecrystals. The Ce(3+)-doped SrB(2)O(4) crystal showed absorption band around 240-320 nm, whichis corresponding to the 4f-5d transition of Ce(3+). Intense emission band at 375 nm due to theCe(3+) 5d-4f transition was observed under (241)Am 5.5 MeV alpha-ray excitation. The scintillation
decay time showed fast (50 ns) and slow (1430 ns) components ascribed to the Ce(3+) 5d-4ftransition and lattice defect in the crystal, respectively. The scintillation light yield of Ce(3+)-doped
SrB(2)O(4) was calculated to be about 1000 ph/n under (252)Cf irradiation. (C) 2011 Elsevier B.V.
All rights reserved.
E-mail Address:fuji-you@tagen.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S0925346711002217

112

1. Tohoku Univ, IMRAM, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. Tohoku Univ, NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan
3. Japan Fine Ceram Ctr, Atsuta Ku, Nagoya, Aichi 4568587, Japan

Abstract:
We investigated basic optical and scintillation properties of pure Y(2)O(3), Tm(3+)-doped Y(2)O(3),pure Lu(2)O(3) and Nd(3+)-doped Lu(2)O(3) transparent ceramics made by a sintering method. All
ceramic samples showed 60-80% transparency, and some absorption bands due to Nd(3+) 4f-4ftransitionwereobservedinNd(3+):Lu(2)O(3)ceramic.

BothTm(3+):Y(2)O(3)andNd(3+):Lu(2)O(3) ceramics showed sharp luminescence lines corresponding to the 4f-4f transition
under

285

nm

(Tm(3+):Y(2)O(3))

and

340

nm

(Nd(3+):Lu(2)O(3))

excitation.

Thephotoluminescence decay times were calculated to be about 24 mu s for Tm(3+):Y(2)O(3) and 1 mu
s for Nd(3+):Lu(2)O(3), respectively. In radioluminescence measurements. Tm(3+) and Nd(3+)
4f-4f luminescence were observed for Tm(3+)-doped Y(2)O(3) and Nd(3+)-doped Lu(2)O(3)ceramics under (241)Am 5.5 MeV alpha-ray excitation. Finally scintillation light yield wasinvestigated with pulse height analysis. (C) 2011 Elsevier B.V. All rights reserved.
E-mail Address:fuji-you@tagen.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S0925346711001741

113

OPTICAL MATERIALS Volume: 34 Issue: 2 Pages: 452-456 Published: DEC 2011

JOURNAL OF RARE EARTHS Volume: 29 Issue: 12 Pages: 1178-1182 Published: DEC 2011

Fundamental optical constants of Nd-doped Y2O3 ceramic and its scintillation
characteristics

Development of novel rare earth doped fluoride and oxide scintillators for
two-dimensional imaging

A Fukabori 1, V Chani 1, J Pejchal 1,2, K Kamada 3, A Yoshikawa 4, T Ikegami 5

A Yoshikawa 1,2, T Yanagida 2, Y Yokota 1, K Kamada 1, N Kawaguchi 1,3, K Fukuda 1,3, A Yamazaki 4, K Watanabe 4,

1. Tohoku Univ, IMRAM, Aoba Ku, Sendai, Miyagi 9800812, Japan
2. Inst Phys AS CR, Prague 16253 6, Czech Republic
3. Furukawa Co Ltd, Mat Res Lab, Tsukuba, Ibaraki 3050856, Japan
4. Tohoku Univ, NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan
5. Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, JapanA Uritani 4, T Iguchi 4, G Boulon 1,5, M Nikl 6
1. Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. Tohoku Univ, New Ind Creat Hatchery Ctr, Aoba Ku, Sendai, Miyagi 9808579, Japan
3. Tokuyama Corp, R&D Ctr, Shibuya Ku, Tokyo 1508383, Japan
4. Nagoya Univ, Chikusa Ku, Nagoya, Aichi 4648601, Japan
5. Univ Lyon, Phys Chem Luminescent Mat LPCML, UCBLyon1, CNRS,UMR 5620, F-69622 Villeurbanne,
France6. Inst Phys AS CR, Prague 16253, Czech Republic

Abstract:
Transparent Nd:Y2O3 ceramics were produced by vacuum sintering. Their fundamental opticalconstants including optical transmittance, reflectivity, absorption coefficient, refractive index,
extinction coefficient, and dielectric constant were evaluated. Scintillation characteristics including
radio-luminescence and light yield under alpha (Am-241 5.5 MeV) excitation are reported as well.
(C) 2011 Elsevier B.V. All rights reserved.
E-mail Address:
fukabori@mail.tagen.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S092534671100173X

Abstract:
Two topics were focused. The first one was about the gamma-ray scintillator, Pr(3+):Lu(3)Al(5)O(12) (LuAG). The second one was about neutron scintillator, Ce(3+):(6)LiCaAlF(6) andEu(2+):(6)LiCaAlF(6)((6)LiCAF). Those scintillators have been developed very recently for modern
imaging applications in the medical and homeland security fields. In both cases, the rare earth ionsare playing the crucial role as emission centers. Pr(3+) in LuAG provided fast 5d -> 4f transition
providing noticeably shorter decay time than that of Ce(3+). Among several candidate hosts, LuAG
showed the best performance. Bulk crystal growth, basic scintillation properties, two-dimensional
gamma-ray imaging and positron emission mammography (PEM) application were demonstrated.
Due to the international situation, the homeland security was compromized by illicit traffic of
explosives, drugs, nuclear materials, etc. and the ways to its improvement became an important
R&D topic. For this purpose the Ce and Eu doped LiCAF appeared competitive candidates.
Especially, when substitution of (3)He neutron detectors was considered, the discrimination abilityof gamma-ray from alpha-ray was important. Bulk crystal growth, basic scintillation properties andtwo-dimensional neutron imaging were demonstrated.
E-mail Address:
yoshikawa@imr.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S1002072110606217

114

115

RADIATION MEASUREMENTS Volume: 46 Issue: 12 Special Issue: SI Pages: 1480-1483 Published: DEC 2011

RADIATION MEASUREMENTS Volume: 46 Issue: 12 Special Issue: SI Pages: 1503-1505 Published: DEC 2011

Radiophotoluminescence from silver-doped phosphate glass

Comparative study of transparent ceramic and single crystal Ce doped LuAG
scintillators

Y Miyamoto 1,2, Y Takei 2, H Nanto 2, T Kurobori 3, A Konnai 4, T Yanagida 5, A Yoshikawa 5, Y Shimotsuma 6,
M Sakakura 6, K Miura 6, K Hirao 6, Y Nagashima 1, T Yamamoto 1
1. Chiyoda Technol Corp, Oarai Res Ctr, Oarai, Ibaraki 3111313, Japan
2. Kanazawa Inst Technol, Adv Mat Sci Res & Dev Ctr, Hakusann, Ishikawa 9240838, Japan
3. Kanazawa Univ, Grad Sch Nat Sci & Technol, Kanazawa, Ishikawa 9201192, Japan
4. Natl Maritime Res Inst, Mitaka, Tokyo 9201192, Japan
5. Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan
6. Kyoto Univ, Grad Sch Engn, Dept Chem Mat, Nishikyo Ku, Kyoto 6158510, JapanT Yanagida 1, Y Fujimoto 1, Y Yokota 1, K Kamada 1, S Yanagida 1, A Yoshikawa 1,2, H Yagi 3, T Yanagitani 3
1. Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. Tohoku Univ, New Ind Creat Hatchery Ctr NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan
3. Konoshima Chem Co Ltd, Takuma, Kagawa 7691103, Japan

Abstract:
Transparent ceramic Ce 0.5% doped Lu3Al5O12 (LuAG) scintillator grown by the sintering method

Abstract:and single crystalline Ce doped LuAG grown by the Czochralski method are prepared. They are cut

Glass dosimeter utilizing radiophotoluminescence (RPL) is one of accumulation type solid state

to the physical dimensions 4 x 4 x 2 mm(3). Their transmittance and radio luminescence spectra are

dosimeters, which is based on luminescence phenomenon of silver (Ag+ ions)-doped phosphateevaluated. They are both transmissive in wavelength longer than 500 nm and intense Ce3+ 5d-4f

glass exposed to ionizing radiation. In this study, to clarify the emission mechanism of yellow andemission appears around 520 nm. When Cs-137 gamma-ray is irradiated, 662 key photo-absorption

blue RPL peaks, optical properties of Ag+-doped glass, such as optical absorption spectrum. RPL

peaks are clearly observed in each sample. The transparent ceramic one shows higher light yield than

excitation spectrum before and after X-ray irradiation as well as the lifetime of both RPL peaks arethat of the single crystalline one. The absolute light yield of the ceramic sample is turned out to bemeasured. From the results, we discuss the emission mechanism of yellow (peaked at 2.21 eV) and

14800 +/- 1500 ph/MeV. The decay time constants are evaluated under pulse X-ray excitation. The

blue (peaked at 2.70 eV) RPL using a proposed energy band diagram for RPL emission andmain component of the decay time of ceramic and single crystalline one are determined as 37 and 46

excitation in Ag+-doped phosphate glass. It is found that the radiative lifetime of blue RPL is threens, respectively. (C) 2011 Elsevier Ltd. All rights reserved.

orders of magnitude faster than that of yellow RPL (C) 2011 Elsevier Ltd. All rights reserved.

E-mail Address:
E-mail Address:

yanagida@imr.tohoku.ac.jp

miyamoto-y@c-technol.co.jp

Site Address:

Site Address:

http://www.sciencedirect.com/science/article/pii/S1350448711002629

http://www.sciencedirect.com/science/article/pii/S1350448711002150

116

117

RADIATION MEASUREMENTS Volume: 46 Issue: 12 Special Issue: SI Pages: 1506-1508 Published: DEC 2011

RADIATION MEASUREMENTS Volume: 46 Issue: 12 Special Issue: SI Pages: 1708-1711 Published: DEC 2011

Scintillation characteristics of Tm3+ in Ca-3(BO3)(2) crystals

Ce and Eu-doped LiSrAlF6 scintillators for neutron detectors

Y Fujimoto 1,2, T Yanagida 1, Y Yokota 1, N Kawaguchi 4, K Fukuda 4, D Totsuka 5, K Watanabe 6, A Yamazaki 6,

T Yanagida 1, N Kawaguchi 2,3, Y Fujimoto 2, Y Yokota 2, A Yamazaki 4, K Watanabe 4, K Kamada 2, A Yoshikawa 1,2,

A Yoshikawa

1,3

V Chani 2
1. Tohoku Univ, IMRAM, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. JSPS, Chiyoda Ku, Tokyo 1028472, Japan
3. Tohoku Univ, NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan
4. TOKUYAMA Corp, Shibuya Ku, Tokyo 1508383, Japan
5. NIHON KESSHO KOGAKU CO LTD, Tatebayashi, Gunma, Japan
6. Nagoya Univ, Chikusa Ku, Nagoya, Aichi 4648603, Japan

Abstract:
Basic optical properties and radiation responses of undoped, Tm3+ 1.0% and 2.0% activatedCa-3(BO3)(2) (CBO) crystalline scintillator prepared by the micro-pulling down (mu-PD) method
are reported. Tm3+: CBO crystals showed three weak absorption bands around 190, 260 and 350 nm,
owing to the Tm3+ 4f-4f transition. Strong blue luminescence peaks at 360 and 460 urn which are
ascribed to the D-1(2)-H-3(6) and D-1(2)-F-3(4) transitions of Tm3+ respectively were observed
under Am-241 5.5 MeV alpha-ray excitation. The scintillation light yield of 2.0% Tm3+-doped CBO
crystal was evaluated to be about 250 ph/n from the Cf-252 excited pulse height spectrum. (C) 2011
Elsevier Ltd. All rights reserved.
E-mail Address:fuji-you@tagen.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S1350448711002587

1. Tohoku Univ, New Ind Creat Hatchery Ctr, Sendai, Miyagi 9808579, Japan
2. Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
3. Tokuyama Co Ltd, Shibuya Ku, Tokyo 1508383, Japan
4. Nagoya Univ, Sch Engn, Chigusa Ku, Nagoya, Aichi 4648603, Japan

Abstract:
Ce 1%, Eu 1%, and Eu 2%-doped LiSrAlF6 (LiSAF) single crystals were grown by the
micro-pulling-down method for thermal neutron applications. The crystals were transparent, 2.0 mm
in diameter and 20-40 mm in length. Neither visible inclusions nor cracks were observed. Theirtransmittance spectra were measured. The strong absorption lines were observed at 200, 240, and
300 nm for Ce:LiSAF due to Ce3+ 4f-5d transition. In Eu:LiSAF, 200 (4f-5d) and 300 (4f-4f) nm
absorption lines were detected. The samples demonstrated strong emission peaks at 300 nm(Ce:LiSAF) and 370 nm (Eu:LiSAFs) when they were irradiated with Am-241 alpha-rays simulating
the alpha-particles from the Li-6(n, alpha) reaction. Thermal neutron responses were examined underCf-252 irradiation. The absolute light yield of Ce, Eu 1%, and Eu 2% crystals were 3400, 18000, and30000 ph/n, respectively. Main components of the scintillation decay time of Ce, Eu 1%, and Eu
2%-doped LiSAFs were 63, 1293, and 1205 ns. (C) 2011 Elsevier Ltd. All rights reserved.
E-mail Address:t_yanagi@tagen.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S1350448711001600

118

119

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 659 Issue: 1 Pages: 258-261 Published: DEC 11 2011

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 659 ssue: 1 Pages: 355-360 Published: DEC 11 2011

Scintillation properties of Nd3+, Tm3+, and Er3+ doped LuF3 scintillators in thevacuum ultra violet region

Luminescence properties and gamma-ray response of the Ce and Ca co-doped(Gd,Y)F-3 single crystals

T Yanagida 1, N Kawaguchi 2,3, K Fukuda 2, S Kurosawa 3, Y Fujimoto 3, Y Futami 3, Y Yokota 3, K Taniue 4,

K Kamada 1,2, T Yanagida 1, Y Fujimoto 1, A Fukabori 1, A Yoshikawa 1,3, M Nikl
1. Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 980, Japan
2. Furukawa Co Ltd, Furukawa, Miyagi, Japan
3. Tohoku Univ, New Ind Creat Hatchery Ctr, Sendai, Miyagi 980, Japan

H Sekiya 5, H Kubo 4, A Yoshikawa 1,3, T Tanimori 4
1. Tohoku Univ, New Ind Creat Hatchery Ctr NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan
2. Tokuyama Corp Ltd, Shibuya Ku, Tokyo 1508383, Japan
3. Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan
4. Kyoto Univ, Grad Sch Sci, Dept Phys, Sakyo Ku, Kyoto 6068502, Japan
5. Univ Tokyo, Inst Cosm Ray Res, Kamioka Observ, Hida 5061205, Japan

Abstract:
In order to develop novel vacuum ultra violet (VUV) emitting scintillators, we grew Nd 0.5%, Tm
0.5%, and Er 0.5% doped LuF3 scintillators by the mu-pulling down method, because LuF3 has avery wide band gap and Nd3+, Tm3+, and Er3+ luminescence centers show fast and intense 5d-4f
emission in VUV region. Transmittance and X-ray induced radioluminescence were studied in thesethree samples using our original spectrometer made by Bunkou-Keiki company. In the VUV region,transmittance of 20-60% was achieved for all the samples. The emission peaks appeared at
approximately 180, 165, and 164 nm for Nd3+, Tm3+, and Er3+ doped LuF3, respectively. Using
PMT R8778 (Hamamatsu), we measured their light yields under Am-241 alpha-ray excitation.
Compared with Nd:LaF3 scintillator, which has 33 photoelectrons/5.5 MeV alpha, Nd:LuF3 andTm:LuF3 showed 900 +/- 90 and 170 +/- 20 ph/5.5 MeV-alpha, respectively. Only for the Nd doped
one, we can detect Cs-137 662 key gamma-ray photoabsorption peak and the light yield of 1200 +/120 ph/MeV was measured. We also investigated their decay time profiles by picosecond pulse

Abstract:
The Ca0.5% and Ce1%, 3%, 7%, 10% co-doped Gd0.5Y0.5F3 single crystals were grown by the
mu-PD method. In the Ca0.5% and Ce3% co-doped sample, Ce3+-perturbed luminescence at 380
nm was observed with 32.4 ns photoluminescence decay time. The energy transfer in the sequence ofthe regular Ce3+ -> (Gd3+)(n)-> the perturbed Ce3+ sites was evidenced through observation of
decay time shortening of the regular Ce3+ and Gd3+ centers and the change between the Gd3+ andCe3+-perturbed emission intensity. The gamma-ray excited scintillation response of the Ca0.5%,
Ce7% co-doped Gd0.5Y0.5F3 sample was investigated with the help of the pulse height spectra andthe light yield, energy resolution and non-proportionality was evaluated in the interval of energies of59.4-1274 keV. (C) 2011 Published by Elsevier B.V.
E-mail Address:
k-kamada@furukawakk.co.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S0168900211012629

X-ray equipped streak camera, and the main decay component of Nd:LuF3 turned out to be 7.63 ns.
(C) 2011 Elsevier B.V. All rights reserved.
E-mail Address:
yanagida@imr.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S0168900211017177

120

121

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 659 Issue: 1 Pages: 368-372 Published: DEC 11 2011

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 659 Issue: 1 Pages: 399-402 Published: DEC 11 2011

Crystal growth and scintillation properties of Ce and Eu doped LiSrAlF6

Performance test of Si PIN photodiode line scanner for thermal neutron detection

A Yamaji 1, T Yanagida 2, N Kawaguchi 3, Y Fujimoto 1, Y Yokota 1, K Watanabe 4, A Yamazaki 4, A Yoshikawa 1,2,

D Totsuka 1,2, T Yanagida 5, K Fukuda 3, N Kawaguchi 3, Y Fujimoto 1, J Pejchal 4, Y Yokota 1, A Yoshikawa 1,5
1. Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. Nihon Kessho Kogalcu Co Ltd, Gunma 3740047, Japan
3. Tokuyama Corp, Shibuya Ku, Tokyo 1508383, Japan
4. Inst Phys AS CR, Prague 16253 6, Czech Republic
5. New Ind Creat Hatchery Ctr NICHe, Aoba Ku, Sendai, Miyagi 9808579, JapanJ Pejchal 5
1. Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. Tohoku Univ, New Ind Creat Hatchery Ctr NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan
3. Tokuyama Corp, Shibuya Ku, Tokyo 1508383, Japan
4. Nagoya Univ, Dept Mat Phys & Energy Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan
5. Inst Phys AS CR, Prague 16200 6, Czech Republic

Abstract:
Abstract:

Thermal neutron imaging using Si PIN photodiode line scanner and Eu-doped LiCaAlF(6) crystal

Ce and Eu doped LiSrAlF6 (LiSAF) single crystals for the neutron detection with different dopant

scintillator has been developed. The pixel dimensions of photodiode are 1.18 mm (width) x 3.8 mm

concentrations were grown by the micro-pulling-down method (mu-PD). In Ce:LiSAF, intense(length) with 0.4 mm gap and the module has 192 channels in linear array. The emission peaks ofemission peaks due to Ce3+ 5d-4f transitions were observed at approximately 315 and 335 nm in

Eu-doped LiCaAlF6 after thermal neutron excitation are placed at 370 and 590 nm, and thephoto- and a-ray induced radio-luminescence spectra. In case of Eu:LiSAFs, an intense emission

corresponding photon sensitivities of photodiode are 0.04 and 0.34 A/W, respectively. Polishedpeak at 375 nm due to Eu2+ 5d-4f transition was observed in the radio-luminescence spectra. The

scintillator blocks with a size of 1.18 mm (width) x 3.8 mm (length) x 5.0 mm (thickness) werepulse height spectra and decay time profiles were measured under Cf-252 neutron irradiation to

wrapped by several layers of Teflon tapes as a reflector and optically coupled to the photodiodes by

examine the neutron response. The Ce 3% and Eu 2% doped LiSAF showed the highest light yieldsilicone grease. JRR-3 MUSASI beam line emitting 13.5 meV thermal neutrons with the flux of 8 x

of 2860 ph/n with 19 ns main decay time component and 24,000 ph/n with 1610 ns. (C) 201110(5) n/cm(2) s was used for the imaging test. As a subject for imaging, a Cd plate was moved at the

Elsevier B.V. All rights reserved.

speed of 50 mm/s perpendicular to the thermal neutron beam. Analog integration time was set to be
416.6 mu s, then signals were converted by a delta-sigma A/D converter. After the image processing,E-mail Address:

we successfully obtained moving Cd plate image under thermal neutron irradiation using PIN

yamaji-a@imr.tohoku.ac.jp

photodiode line scanner coupled with Eu-doped LiCaAlF(6) SCintillator. (C) 2011 Elsevier B.V. All

Site Address:

rights reserved.

http://www.sciencedirect.com/science/article/pii/S0168900211017086

E-mail Address:
totsuka@imr.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S0168900211015555

122

123

JOURNAL OF PHYSICS D-APPLIED PHYSICS Volume: 44 Issue: 50 Article Number: 505104 Published: DEC 21 2011

CRYSTAL GROWTH & DESIGN Volume: 12 Issue: 1 Pages: 142-146 Published: JAN 2012

Scintillator-oriented combinatorial search in Ce-doped (Y,Gd)(3)(Ga,Al)(5)O-12
multicomponent garnet compounds

Characterizations of Ce3+-Doped CaB2O4 Crystalline Scintillator
Y Fujimoto 1, T Yanagida 2, N Kawaguchi 3, S Kurosawa 1, K Fukuda 3, D Totsuka 4, K Watanabe 5, A Yamazaki 5,

K Kamada 1, T Yanagida 2, J Pejchal 1, M Nikl 3, T Endo 1, K Tsutumi 1, Y Fujimoto 1, A Fukabori 1, A Yoshikawa 1,3

Y Yokota 1, A Yoshikawa 1,2
1. Tohoku Univ, IMR, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. Tohoku Univ, NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan
3. Tokuyama Corp, Shibuya Ku, Tokyo 1508383, Japan
4. Nihon Kessho Kogaku Co Ltd, Tatebayashi Gunma, Japan
5. Nagoya Univ, Chikusa Ku, Nagoya, Aichi 4648603, Japan

1. Tohoku Univ, Inst Mat Res, Mat Res Lab, Furukawa Co Ltd,Aobu Ku, Sendai, Miyagi 9808577, Japan
2. Tohoku Univ, New Ind Creat Hatchery Ctr, Sendai, Miyagi 9808579, Japan
3. Inst Phys AS CR, Prague 16200, Czech Republic

Abstract:
Ce-doped (YyGd1-y)(3)(GaxAl1-x)(5)O-12 (x = 0, 1, 2, 3, 4 and y = 1, 2, 3) single crystals aregrown by the micro-pulling down method. X-ray diffraction and electron probe microanalysis
techniques are employed to check their structure and chemical composition, respectively. Opticaland photoluminescence characteristics are measured and radioluminescence spectra, light yield andscintillation decay measurements are further made to evaluate the scintillation performance. We
show that balanced Gd and Ga admixture in the Y3Al5O12 structure can considerably increase thescintillation efficiency, and the spectrally corrected light yield value exceeds 44 000 photon MeV-1.
Scintillation decay times approach that of Ce3+ photoluminescence decay and an additional lessintense slower component is also observed. Physical aspects of energy transfer process and 5d(1)excited state depopulation are discussed. The micro-pulling down technique is shown as an ideal tool
for a directed combinatorial search for targeted single crystal compositions to reveal those with thehighest figure-of-merit for a given application field.
E-mail Address:
k-kamada@furukawakk.co.jp
Site Address:
http://iopscience.iop.org/0022-3727/44/50/505104/

124

Abstract:
Single crystals of undoped and 0.5% Ce3+-doped calcium metaborate CaB2O4 have been grown
successfully by micropulling down (mu-PD) technique. The material can find its application in theneutron detection. After the single-phase of CaB2O4 was confirmed using X-ray diffraction analysis,
optical and scintillation characteristics were investigated. In the transmittance spectra, Ce3+-doped
crystals showed absorption bands around 270 and 320 nm which are ascribed to the transition from
4f ground state to Sd excited state of Ce3+. Under the Am-241 5.5 MeV alpha-ray excitation, strong
emission peak at 370 nm because of the Ce3+ Sd-4f transition was observed for Ce3+-doped crystal,
while the undoped crystal showed broad intrinsic emission band around 300- 400 nm which is
caused by the lattice defects in the host crystal. The absolute light yield was calculated to be about
2200 photons per neutron under Cf-252 neutron irradiation.
E-mail Address:fuji-you@imr.tohoku.ac.jp
Site Address:
http://pubs.acs.org/doi/abs/10.1021/cg200885h

125

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERSOPTICAL MATERIALS Volume: 34 Issue: 4 Pages: 627-631 Published: FEB 2012

DETECTORS AND ASSOCIATED EQUIPMENT Volume: 664 Issue: 1 Pages: 127-131 Published: FEB 1 2012

Investigations of optical and scintillation properties of Tm3+-doped YAlO3
Crystal growth and scintillation properties of Er-doped Lu3Al5O12 single crystals
D Totsuka 1,2, T Yanagida 3, M Sugiyama 1, J Pejchal 4, Y Fujimoto 1, Y Yokota 1, A Yoshikawa 1,3
1. Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. Nihon Kessho Kogaku CO LTD, Gunma 3740047, Japan
3. New Ind Creat Hatchery Ctr NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan
4. Inst Phys AS CR, Prague 16253 6, Czech Republic

M Sugiyama 1, Y Fujimoto 1, T Yanagida 2, D Totsuka 1,3, S Kurosawa 1, Y Futami 1, Y Yokota 1, V Chani 1,
A Yoshikawa 1,2
1. Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. Tohoku Univ, New Ind Creat Hatchery Ctr NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan
3. Nihon Kessho Kogaku Co Ltd, Tatebayashi Gunma, Japan

Abstract:
Er-doped Lu3Al5O12 (Er:LuAG) single crystalline scintillators with different Er concentrations of
0.1, 0.5, 1, and 3% were grown by the micro-pulling-down (mu-PD) method. The grown crystals
were composed of single-phase material, as demonstrated by powder X-ray diffraction (XRD). The
radioluminescence spectra measured under Am-241 alpha-ray excitation indicated host emission at
approximately 350 nm and Er3+ 4f-4f emissions. According to the pulse height spectra recorded
under gamma-ray irradiation, the 0.5% Er:LuAG exhibited the highest peak channel among thesamples. The gamma-ray excited decay time profiles were well fitted by the two-component

Abstract:
Pure, 0.1, 0.5 and 1 mol% Tm-doped YAP single crystalline scintillators were grown by the mu-PD
method. The XRD analysis confirmed the lattice constants decrease with the Tm concentration. In
the transmittance measurement, the absorption bands due to the Tm3+ 4f-4f transitions wereobserved at 265, 360, 485, 690 and 800 nm and they were ascribed to the transition from the H-3(6)ground state to its I-1(6), D-1(2), (1)G(4), F-3(3) and H-3(4) excited states, respectively. Strong
emission peak due to the I-1(6)-F-3(4) transition of Tm3+ appeared at 350 nm under X-ray
irradiation. The photoluminescence decay time constants related to this transition were evaluated tobe from 15.3 to 17.3 mu s and the scintillation decay time constants under gamma-ray excitation

exponential approximation (0.8 mu s and 6-10 mu s). (C) 2011 Elsevier B.V. All rights reserved.

were estimated to be from 17.5 to 18.8 mu s. The Tm 1% doped crystal exhibited the highest light

E-mail Address:

Elsevier B.V. All rights reserved.

makoto.sugiyama@imr.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S0168900211020298

yield of 15, 100 +/- 1500 photons/MeV when excited by Cs-137 gamma-ray radiation. (C) 2011

E-mail Address:
totsuka@imr.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S092534671100454X

126

127

OPTICAL MATERIALS Volume: 34 Issue: 4 Pages: 729-732 Published: FEB 2012

JAPANESE JOURNAL OF APPLIED PHYSICS Volume: 51 Issue: 2 Article Number: 022603 Published: FEB 2012

Crystal growth and scintillation properties of Ce-doped sodium calcium lutetium
complex fluoride

Optical Characteristic Improvement of Neodymium-Doped Lanthanum Fluoride
Thin Films Grown by Pulsed Laser Deposition for Vacuum Ultraviolet Application

S Wakahara 1, Y Furuya 1, T Yanagida 2, Y Yokota 1, J Pejchal 3, M Sugiyama 1, N Kawaguchi 1, D Totsuka 1,4,

M Ieda 1, T Ishimaru 1, S Ono 1, K Yamanoi 2, M Cadatal-Raduban 2, T Shimizu 2, N Sarukura 2, K Fukuda 3,4,

A Yoshikawa 1,2

T Suyama 3, Y Yokota 4, T Yanagida 5, A Yoshikawa 4
1. Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan
2. New Ind Creat Hatchery Ctr NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan
3. Inst Phys AS CR, Prague 16200 6, Czech Republic
4. Nihon Kessho Kogaku Co Ltd, Tatebayashi, Gunma 3740047, Japan

Abstract:
0.1%, 0.5%, 1% and 3% Ce doped scintillation crystals based on NaF-CaF2-LuF3 solid solutions
were grown from the melt using Micro-Pulling-Down (mu-PD) method. The grown crystals weretransparent and their transmittance was approximately 80% for the wavelengths longer than 320 nm.
Concerning the scintillation properties, radio-luminescence peaks of the crystals were detected at
approximately 330 nm. The light yield of the crystals was also measured using gamma-ray (Cs-137

1. Nagoya Inst Technol, Nagoya, Aichi 4668555, Japan
2. Osaka Univ, Inst Laser Engn, Suita, Osaka 5650871, Japan
3. Tokuyama Corp, Chiyoda Ku, Tokyo 1508383, Japan
4. Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
5. Tohoku Univ, New Ind Creat Hatchery Ctr, Sendai, Miyagi 9808579, Japan

Abstract:
Neodymium-doped lanthanum fluoride (Nd3+:LaF3) thin films were successfully grown on
MgF2(001) substrates by pulsed laser deposition. Photoluminescence spectra revealed a dominantpeak at 173 nm with a decay time of 7.8 ns, which is similar to the results obtained from a bulk
Nd3+:LaF3 crystal. Improvements in crystalline quality and vacuum ultraviolet (VUV)

and Na-22) as the excitation source. (C) 2011 Elsevier B.V. All rights reserved.

luminescence quantum efficiency were achieved by substrate heating, with optimum results being

E-mail Address:

light-emitting device operating in the VUV region. (C) 2012 The Japan Society of Applied Physics

wakahara@imr.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S0925346711005040

obtained at 400 degrees C. These results would open up possibilities in the development of a

E-mail Address:
cja16502@stn.nitech.ac.jp
Site Address:
http://jjap.jsap.jp/link?JJAP/51/022603/

128

129

OPTICAL MATERIALS Volume: 34 Issue: 5 Pages: 868-871 Published: MAR 2012

JOURNAL OF INSTRUMENTATION Volume: 7 Article Number: C03013 Published: MAR 2012

Eu-doped (LiF)-Li-6-SrF2 eutectic scintillators for neutron detection

Development of a new imaging device using a VUV scintillator and a gas
photomultiplier with a mu-PIC and GEM

T Yanagida 1, K Fukuda 2, Y Fujimoto 4, N Kawaguchi 2,4, S Kurosawa 4, A Yamazaki 3, K Watanabe 3, Y Futami 4,
Y Yokota 4, J Pejchal 4, A Yoshikawa 1,4, A Uritani 3, T Iguchi 3
1. Tohoku Univ, New Ind Creat Hatchery Ctr NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan
2. Tokuyama Corp, Shibuya Ku, Tokyo 1508383, Japan
3. Nagoya Univ, Grad Sch Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan
4. Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, JapanS Kurosawa 1, K Taniue 2, H Sekiya 3, H Kubo 2, C Ida 2, K Miuchi 2, T Tanimori 2, T Yanagida 4, Y Yokota 1,
A Yoshikawa 1,4, K Fukuda 5, N Kawaguchi 5, S Ishizu 5, M Nakagawa 5, T Suyama 5, J Pejchal 1,6
1. Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 98077, Japan
2. Kyoto Univ, Grad Sch Sci, Dept Phys, Sakyo Ku, Kyoto 6068502, Japan
3. Univ Tokyo, Inst Cosm Ray Res, Kamioka Observ, Inst Phys & Math Universe, Hida, Gifu 5061205, Japan
4. NICHe, Aoba Ku, Sendai, Miyagi 9808579, Japan
5. Tokuyama Corp, Chiyoda Ku, Tokyo 1008983, Japan
6. Inst Phys AS CR, Prague 16253 6, Czech Republic

Abstract:
Eu2+ 0.05%, 0.1%, and 0.2% activated LiF-SrF2 eutectic scintillators were prepared by the
Bridgman method using Li-6 enriched (95%) raw material. The alpha-ray-induced radio
luminescence spectra showed intense emission peak at 430 nm due to an emission from Eu2+ 5d-4ftransition in the Eu:SrF2 layers. When excited by Cf-252 neutrons, all the samples exhibited almost
the same light yields of 5000-7000 ph/n with a typical decay times of several hundreds ns. (C) 2011
Elsevier B.V. All rights reserved.
E-mail Address:
yanagida@tagen.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S0925346711005386

Abstract:
We have developed a new imaging device consisting of a VUV scintillator coupled to a gas
photomultiplier (gas PMT) with a CsI photocathode, micro pixel chamber (mu-PIC) and gas electron
multipliers (GEMs). Generally, the VUV scintillator has a short decay time of less than similar to 10
nsec. Thus the new detector could be used under the high rate counting (similar to 10 MHz) in thehard X-ray to soft-gamma ray region. Our goal in this paper is to obtain a soft gamma-ray image at
0.1 MeV with our gas PMT combined with the VUV scintillator as a high rate counter, and we have
optimized electric fields in the gas PMT and developed a new VUV scintillator with a higher light
output. In order to obtain a higher collection efficiency of photoelectrons and suppress the ion
feedback in the gas PMT, we first optimized the electric field. Then we decided the electric field in
the drift, transfer, and induction region to be 0.25, 1.0 and 3.0 kV/cm, respectively. The total gas
gain of the gas PMT was approximately 2 x 10(5), and the gas PMT was estimated to have aquantum efficiency (QE) of 0.7% at 178 nm. Additionally, as a consequence of new VUVscintillators search, Nd:LuLiF4 and Nd:LuF3 with a volume of 10 mm x 10 mm x 5 mm were foundto have higher light outputs than Nd:LaF3, which is a conventional VUV scintillator, by a factor of
2.1, and 2.6, respectively, and the Nd:LuF3 irradiated with 5.5-MeV alpha-rays had a light output ofapproximately 400 photons. Finally, we succeeded in obtaining the crystal images upon 5.5 MeV
alpha and 0.122 MeV gamma rays excitation from Am-241- and Co-57 sources, respectively, using
the gas PMT with the Nd:LuF3.
E-mail Address:
kurosawa@imt.tohoku.ac.jp
Site Address:
http://iopscience.iop.org/1748-0221/7/03/C03013/

130

131

TV, Journals and Newspaper Items

132

133

134

135

136

137

138

139

140

141

2011 年度（平成 23 年度）吉川研究室行事
月

吉川研究室

学会

研究会・講演会

4

4/7-9 阪大レーザー研研究会
4/22 学振１６１委員会(東京)5 引っ越し

4/9-11 阪大レーザー研シンポジウム 20116

6/13-18 REMAT(Wroclaw, POLAND)
6/25-30 IWCGT-5(Berlin, GERMANY)
6/30-7/6 ICL11(Ann Arbor, USA)

6/4-5 放射線物理研究会(名古屋)7

7/31-8/3 ACCGE(Monterey, USA)

7/24-30 国際サマースクール(ミュンヘン工科大学)

8

8/28-9/1 応 用物 理 学会秋季 学術講演会 8/3(山形)

9

9/10-17 SCINT2011(Giessen, GERMANY) 9/22 学振１６１委員会(東京)1010/22-31 IEEE NSS/MIC2011(Valencia, SPAIN)

10/18-19 発光材料国際シンポジウム(作並温泉)
10/21 THCH Biz EXPO(名古屋)11

11/14-17 The 7th Laser Ceramics

11/2-5 NCCG-41(つくば)11/19-20 第 1 回戦略的放射線物理学研究会(浜松)11/25 学振１６１委員会(東京)Symposium(SINGAPORE)

放射線物理研究会(秋保温泉)

12 12/27 忘年会

12/1-2 GCOE 国際会議(金研)12/2-5 大洗国際ワークショップ(大洗)12/9-11 光物性研究会(熊本)11/11-12 学振１６１委員会(浜松）Events and Memorieas

1/20-21 TDK 進捗＆技術検討会議(秋保温泉)
1/23-26 研究会「放射線検出器とその応用」(つくば)
1/27 放射線医学総合研究所・PET 研究会講演(稲毛)2
3 3/7-8 研究室シンポジ 3/14-18 応用物理学関連講演会(東京)
ウム＆スキー 旅行 3/19-21 日本セラミクス協会 2012 年会
(蔵王)
(京都)
3/27-30 PRE'12 Workshop(京都)142

3/2-3 学振１６１委員会(東京)143Events of Yoshikawa laboratory
Visiting Laser Laboratory
Osaka univ., April 7, 2011

Hanami (Cherry-Blossom viewing)
Tohoku univ., April 15, 2011

144

International symposium on luminescent materials
Sakunami, Oct 18-19, 2011

Moving to IMR
Tohoku univ., May 13, 2011

Summer school of radiation
Akiu, August 1-3, 2011145

SCINT
Germany, 11-16, Sep, 2011

IEEE / NSS 2011
Spain, 23~31, Oct.,2011

146

Ski trip
Zao, March 7, 2012

Farewell party
March 2, 2012147

吉川研究室 研究報告書

2011 Research Reports of
the Yoshikawa Laboratory〒980-8577
宮城県仙台市青葉区片平 2-1-1
東北大学 金属材料研究所
先端結晶工学研究部 吉川研究室〒980-8579
宮城県仙台市青葉区荒巻字青葉 6-6-10
未来科学技術共同研究センター（NICHe）

兼任

Yoshikawa Laboratory
Research Laboratory on Advanced Crystal Engineering,
Institute for Materials Research (IMR), Tohoku University
2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, JAPANNew Industry Creation Hatchery Center (NICHe)
6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, JAPANANNUAL REPORT 2011148

Published on
発行日

April 11, 20122012 年 12 月 30 日

Publisher
発行者

Akira Yoshikawa
吉川 彰

Editors

Akira Yoshikawa, Yoshisuke Futami
Yoshikawa Laboratory
Research Laboratory on Advanced Crystal Engineering,
Institute for Materials Research (IMR),
Tohoku University

編集者

New Industry Creation Hatchery Center (NICHe),
Tohoku University
吉川 彰、二見能資
東北大学 金属材料研究所
先端結晶工学研究部 吉川研究室

Printed by
印刷所

Yoshikawa Laboratory
吉川研究室
149

Yoshikawa Lab.
Research Report
Published on December 1, 2011

ANNUAL REPORT 2011
編集・発行
東北大学 金属材料研究所
吉川研究室
吉川 彰 ・ 二見能資

150

Edited and published by
A. Yoshikawa
Yoshikawa Laboratory
Institute for Materials Research,
Tohoku University
http://yoshikawa-lab.imr.tohoku.ac.jp/