Contents
1

Preface ........................................................................................................................ 4

2

Research digest .......................................................................................................... 5

3

Members of Yoshikawa Lab .................................................................................... 16

4

List of International collaborations ........................................................................ 20

5

List of research collaborations ................................................................................ 24

6

Research funds ......................................................................................................... 26

7

List of patents .......................................................................................................... 35

8

List of conferences .................................................................................................... 36

9

List of abstracts ........................................................................................................ 74

10

Copies of TV, journal and newspaper items ......................................................... 116

11

Events and memories of Yoshikawa Lab ................................................................ 121

2

3

Preface
Dear Colleagues and Collaborators,
Thank you for downloading the Annual Report of the Yoshikawa Laboratory in the Institute forMaterials Research (IMR) and Yoshikawa Project in the New Industry Creation Hatchery Center(NICHe), Tohoku University. As usual, we distribute the Annual Report in digital format that helps us
to save some trees required for the paper production and to make it easier for you to access the copy of
the Report at any time when your computer is with you.
The Report contains a summary of our research activities and selected papers published in FY2015.
The current issue covers our progress within academic year from April 2015 to March 2016. In thisperiod, we had continued development of our basic technologies considering both practical andfundamental points of view. Some of our achievements are listed below:
 Further progress in studies of Ce:GAGG crystals for gamma-ray scintillators. This year,
performance of the Ce:(Gd,Y,Lu)AGG crystals was further improved by their co-doping withdivalent ions, following stabilization of the Ce4+ centers.
 Crystal growth of halide materials. As an example, one- and two-inch diameter CeBr3 crystals
were grown by Bridgman method using modified micro-pulling down apparatus.
 Development of two-inch diameter La-substituted GPS crystals with exceptionally hightemperature stability.
 Growth of langasite type crystals. Al-substituted CTGS crystals are studied for their application in
oscillators, resonators, and combustion pressure sensors. Bulk crystal growth technology for
two-inch diameter CTGS is established.
 Fiber growth technology of processing resistant material, such as Ir based alloy and CCM aredeveloping. Some of the fibers were successfully growth from the melt.
Our long-term policy is to develop chains of research capabilities that connect three areas of expertiseas follows: (1) materials production (including crystal growth), (2) materials physics and characterization,and (3) application of the materials in current and prospective devices. Such chain was built for the
scintillating materials and for the piezoelectric materials.
Our projects are always supported by our colleagues from all over the world, and this collaboration is
generally very successful. The details of their contribution are reflected in the papers published within theabove period and incorporated into the Report.
Laboratory members took part in preparation of this Report. I appreciate their efforts and kind help
very much. I wish also thank all of our colleagues from Japan and overseas that had participated in our
research projects and significantly contributed to their progress.
We are looking forward to make our world better, and we appreciate your help in this job.
Akira YOSHIKAWA

Professor,
Institute for Materials Research (IMR), Tohoku University
New Industry Creation Hatchery Center (NICHe), Tohoku University
March, 20164

Research digest

5吉川研究室の研究体制
結晶材料設計

結晶成長

マテリアル・
デザイン

結晶作製

回折結晶学
・分析化学
結晶性・組成評価

物性

デバイス・装置化

特性評価

デバイス・装置評価

Al, B, Y, …
Ce, Pr, Nd, Tm, …
Ca, Na, K, ..

物質設計・結晶成長・結晶性評価・物性・デバイス＆装置化；
基礎科学を上流から下流まで垂直統合する体制で外部エネルギーと結晶の相互作用の視点から新規結晶を創り、機能性追求を目指す。

6

ガンマ線用シンチレータの開発 Ce:GAGG シンチレータ
Pr:LuAG シンチレータ

NEDO大学発事業創出実用化研究開発事業「MRI-PET用Pr：
LuAG＋APDアレー放射線検出器ｼｽﾃﾑの開発」
PL：吉川 （2008-2011）

高品質・大型結晶作製技術の開発
4 inch f
2 inch f
m-PD

JST研究成果展開事業「無人ヘリ搭載用散乱エネルギー認識型
高位置分解能ガンマカメラの実用化開発」
分担開発者：吉川、黒澤 （2012-2014）
厚生労働科学研究費補助金「非侵襲血中RI濃度測定を可能にする
ウエアラブル・サブミリ解像度PET装置の開発」
分担開発者：吉川、鎌田 （2013-2015）
NEDO革新的ものづくり産業創出連携促進事業「次世代高分解能
PET装置を拓く、新規高性能シンチレータの量産技術開発」
PL：鎌田 （2015-2017）

アレー作製技術、アッセンブリ技術の開発
材料開発

透明セラミックス
産学連携研究により検出器開発

乳がん診断用PET装置の実現に貢献• バンドギャップエンジニアリングによる新規高性能シンチレータの発明• 大型結晶作製技術の開発• 発光高速化現象の原理解明

各種ガンマカメラの共同開発。更に新規PET装置
開発事業への展開。

7

ガンマ線用シンチレータの開発（Eu:SrI2 & Ce:La-GPS）
Eu:SrI2 高エネルギー分解能

Ce:La-GPS：優れた高温耐性

採択プロジェクト
（累計総額３億円以上）

採択プロジェクト
（累計総額1億円以上）• 経産省「震災復興イノ
ベーション」PL吉川• JST 先端計測
• NEDO 希少元素削減• JST A-step実用化PL吉川
高温での発光量維持
資源探査への応用期待

•
•
•
•
•

独自の育成・パッケージ技術の確立
結晶の2インチ化に先駆けて成功
エネルギー分解能3%台達成
放射線検出器へのマウント
共同研究先から検出器の市販開始

論文等：Y. Yokota, A. Yoshikawa et.al., J. Cryst.
Growth(2011)+他4報• 新規材料（東北大単独で特許取得、PCT：
各国移行中）• 結晶の2インチ化に成功、アレイカメラ開発• 複数社と共同研究中• 有償サンプルの供給開始
論文等：S. Kurosawa, A. Yoshikawa et.al., NIMA(2014),
A. Yoshikawa, K. Kurosawa et.al., Cryst. Growth & Des.
(2015)+他6報
8中性子用 シンチレータ

共晶体シンチレータ

厚労省科研費 医療機器研究開発推進事業「高速セルイメージングを可能にする次世代X線CT用ハロゲン化物シンチレータの開発」PL：吉川 （2008-2011）
JST A-Step シーズ育成「核物質セキュリティ用3He代替中性子計測装置の開発」研究分担者 吉川・横田（2012-2015)

JST Astepハイリスク挑戦タイプ「X線位相イメージングを飛躍させる超高解像度、高感度X線検出器の実用化開発」
PL：吉川 （2014-2016）
JST Astep FS「共晶体ファイバー構造を応用した、超高分解能、高感度中性子イメージング装置の開発」
PL：鎌田 （2014-2015）

Y. Yokota, A. Yoshikawa et.al.,
Cryst. Growth & Des.(2011)
4inch f インゴット +他13報
3He ガスに代わる固体材料LiCAF シンチレータ

PoGO Light 搭載
宇宙中性子検出成功(2011.7)
NASA

2元系共晶GdAlO3/sapphire• ファイバー状共晶体構造を利用した光導波型シンチ
レータの実現• 新規共晶体シンチレータの開発

SLAC

中性子ピーク
直接観測

3元系共晶LiF/LiBaF3/CaF2

LiCAFを搭載した中性子検出器の作製・実用化試験実施。

産学連携によるX線位相イメージング装置開発事業
への展開。

9

CERNの次世代検出器開発プロジェクトに参画（アジアから唯一）！

黒澤准教授
吉川

INTELUM project Kick-Off Meeting @ CERN on 11, March, 201510

圧電結晶の開発とその応用
戦略的基盤技術高度化支援事業「燃焼圧センサー用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」 SL：吉川（2011-2012年度）
グローバル技術連携・創業支援補助金「燃焼圧センサ用形状制御圧電結晶作製を可能にする特殊合金坩堝の鋳造技術と連続原料供給システムの開発」 PL：吉川 （2012年度）

形状制御結晶育成技術の開発（ランガサイト型結晶）

NEDO希少金属代替・低減技術実用化開発助成事業「小型振動子用ランガサイト型圧電結晶材料におけるランタン、ガリウムおよびタンタル元素低減技術の開発」 PL：吉川 （2013-2014年度）
NEDO戦略的省エネルギー技術革新プログラム（実用化開発）「新規圧電結晶を用いた低コスト・省電力タイミングデバイスの開発」
PL：吉川 （2014-2016年度）
NEDO新エネルギーベンチャー技術革新事業（フェーズAおよびB)「新規圧電結晶を用いた屈曲振動子等による発電技術の開発」
PL：吉川 (2014-2016年度)

新型CTGAS圧電結晶の開発と評価
評価

フィードバック

燃焼圧センサ試作器の開発
燃費改善効果：M/T車 約10%,
A/T車 約4%

新型省電力振動子の開発

広帯域・高速起動

小型・高安定

水晶では
困難な領
域を実現
水晶

低インピーダンス
FREQUENCY

CTGAS

振動発電素子の開発

230Hzで19V(160µW)を達成
発電

振動
中空素子

・トルク変動を燃焼圧センサーで直接検知→更なる燃焼率改善、Nox低減が可能

広帯域

インピーダンス・形状制御ランガサイト型圧電結晶を作製することで製造コストが大幅に削減

精密超音波計測技術

高精度定数・温度係数決定、均質性評価と改善でデバイス実用化に貢献

構造物の低周波振動を利用

屈曲

Ca3NbGa3Si2O14 (CNGS) φ3×260mm

Y→
50mm

11

難加工性合金線材
経産省 戦略的基盤技術高度化支援事業「難加工性機能性合金の形状制御結晶育成技術の開発」SL：吉川 （2011-2013）
経産省 橋渡し研究助成事業「量産型マイクロＰＤ装置の開発」
PL：横田（2014-2015)

中小企業と共に難加工合金線材の製造が可能な製造装置・部材の開発を実施(地域産業創成)

長尺Ir合金、Pt合金線材の製造に成功。田中貴金属と実用化研究を実施中。

共晶体構造熱電材料
NEDO熱電変換材料・デバイス高性能高信頼化技術開発「共晶体構造を用いた高性能指数熱電酸化物材料の研究開発」
PL：吉川 （2015-2016）

共晶体構造を利用した世界初の高特性熱電材料を開発する研究

共晶体構造を利用した世界最高特性の酸化物
熱電材料(ZT>4)を実現する。

12事業化の例①Pr:LuAGシンチレータ
古河機械金属社から製品化③中性子用シンチレータ
LiCAF ㈱トクヤマから製品化②Pr:LuAG搭載の乳房用PET装置④LiCAFを搭載した中性子検出器
古河シンチテック社から製品化 ⑤Ce:GAGGシンチレータ ポニー工業から製品化
古河機械金属、（セキュリティ応用）㈱Ｃ＆Ａから
製品化⑦Eu:SrI2シンチレータ㈱Ｃ＆Ａから製品化⑥ガンマキャッチャー
（Ce:GAGGを搭載した
コンプトンカメラ）
浜松ホトニクスから製品化⑧Eu:SrI2を搭載したスペクトロメータ
千代田テクノル
から製品化

13
8

受賞・新聞等1. 2010.11.19, 河口範明, 日本電子材料技術協会第47回秋季
講演大会優秀賞, 「高時間分解能X線・ガンマ線検出器用
シンチレーター結晶の開発」
2. 2011.5.31, 横田 有為, 田中貴金属グループ MMS 賞「貴金属に関わる研究助成金」
3. 2011.8.3, 杉山 誠, 放射線夏の学校 優秀ポスター賞,
日経新聞（2015年5月1日）
日刊工業新聞「Nd添加LuAG単結晶を用いたX線撮像検出器の試作」
河北新報2014年5月9日
2014年8月4日
4. 2011.8.3, 黒澤 俊介, 放射線夏の学校 最優秀ポスター賞, 「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」
5. 2011.11.15, 藤本 裕, 第31回応用物理学会講演奨励賞
6. 2012.3.21, 杉山 誠, 東北大学工学研究科長賞
7. 2012.5.25, 黒澤俊介, 第１回新化学技術研究奨励賞, 「小型・耐水放射線検出器による河川での放射線量モニタ用のシンチレーション結晶開発」
電気新聞（2014年9月8日）
8. 2013.10.9, 吉川彰, 財団法人服部報公会 報公賞, 「ガーネット型シンチレータの開発と放射線検出器への展開」
9. 2013.11.6, 鎌田圭, 第１１回日本結晶成長学会奨励賞,「GAGGシンチ 河北新報（2014年9月20日）
日経新聞（2012年1月6日）
レータの開発と放射線検出器への応用」
10.2013.11.19, 黒澤俊介, 吉川彰, 他 第35回（2013年秋季）応用物理学会講演奨励賞, 「赤・近赤外線発光シンチレータの開発と応用研究」
11.2014.3.4, 鎌田圭, 平成２５年度トーキン科学技術賞「高性能シンチ
レータ及びそれを用いた放射線検出器の開発」
12.2015.3.5, 黒澤俊介, トーキン科学技術賞, 「大深度でのシェールガス
等の資源探査を可能にする革新的素子の開発」
13.2014.4.15, 吉川彰, 鎌田圭, 平成26年度科学技術分野の文部科学大臣表彰（科学技術賞）,「高性能シンチレータ及びそれを用いた放射線検出器の開発」
14.2015.5.18, 黒澤俊介, インテリジェント・コスモス奨励賞,「パイロシリ
ケート結晶の発光材料としての網羅的な研究」
15.2015.5.25, 黒澤俊介, 本間記念賞,「パイロシリケート結晶の発光材料としての網羅的な研究」
16.2015.8.27, 吉川彰, 鎌田圭, JST, NEDO 大学発ベンチャー表彰
鎌田 吉川 14
経済産業大臣賞

Combination of m-PD and CZ method fordevelopment of novel scintillator single crystals

Characterization
Opt. Mater. 30(2007)6

Micro-pulling method
Quick materials screeningof candidate crystals
Laser, nonlinear
Scintillator
Faraday rotator
Piezoelectric

CZ methodHigh quality
bulk single crystal

feedback

SEM-EDS-EPMA
Composition analysis

PL, RL
Luminescence
properties

XRC
Crystallinity

Radiation response
Light yield,
scintillation decay15

Members

16

2015 年度 吉川研究室
Members (2015 academic year)

4. 1. 2015
教授

Professor
Dr.

Akira Yoshikawa

Associate Professor

吉川 彰

NICHe 兼任

准教授

Dr.

Yuui Yokota

横田 有為

NICHe

Dr.

Kei Kamada

鎌田 圭

NICHe

Assistant Professor

助教

Dr.

Shunsuke Kurosawa

黒澤 俊介

Dr.

Yuji Ohashi

大橋 雄二
顧問

AdviserProf

Masae Kikuchi

菊地 昌枝

Prof

Touetsu Shishido

宍戸 統悦

Technical Counsellor
Hiroshi Uemura

技術参事
上村 博
技術補佐研究員

AssistantKeiko Toguchi

戸口 景子

Megumi Sasaki

佐々木 愛美秘書

Secretaries
Yuka Takeda

武田 悠佳
17

Kuniko Kawaguchi

川口 邦子
研究員

Researcher
Yasuhiro Shoji

庄子 育宏

Robert Kral

ロバート クラル

Graduate Students

学振特別研究員

大学院生

Akihiro Yamaj

山路 晃広

D3

Tetsuo Kudo

工藤 哲男

D1

Masanori Kitahara

北原 正典

M2

Tomoki Ito

伊藤 友樹

M2

Rikito Murakami

村上 力輝斗M2

Aya Nagura

名倉 亜耶

M2

Chieko Tanaka

田中 智恵子M1

Hiroyuki Chiba

知場 啓志

M1

Takahiro Horiai

堀合 毅彦

M1

Hiroyuki Yamaguchi

山口 大聡

M1

民間等共同研究員

Researchers
Hisakazu Nagato

長門 久和(株)C＆A

Shoki Hayasaka

早坂 将輝(株)C＆A18

Idzumi Chida

千田 いづみ(株)C＆A

Tsuneyoshi Miki

三木 常義

由利工業(株)

Yusuke Takahashi

高橋 祐介

由利工業(株)

Osamu Eguchi

江口 治（株）Piezostudio

Kenji Inoue

井上 賢司（株）Piezostudio

Hiroyuki Amano

天野 宏之（株）Piezostudio

Takuya Sato

佐藤 拓也（株）Piezostudio

Masayuki Ito

伊藤 正敏（株）Piezostudio

Yuji Machida

町田 有司（株）Piezostudio

Visiting Professors/Researchers

客員教授

Prof. Georges Boulon

ジョージ ブーロン

FranceProf. Martin Nikl

マーチン ニクル

Czech Republic

Dr.

VladimirV.Kochurikhin

ヴラディミール カチューリッヒン

RussiaDr.

TCHANI Valery

チャニ ワレリー

CanadaVisiting Researchers
Dr. Jan Pejchal

Dr.

Andrey Medvedev

客員研究員
ヤン ペジャール

Czech Republic

アンドレ メドベージェフ

Russia19

List of International collaborations

20

Visits by International Collaborator 2015
Affiliation
General Physics Institute(Russia)
LPCML, CB Lyon1 Univ.

(France)
Svetcha(Canada)Institute of Physics CAS(Czech Republic)
Institute of Physics CAS(Czech Republic)
Stanford University,
California (USA)The University of Tennessee(USA)
National Centre for Nuclear
Research (Poland)

Researcher
Dr. V. Kochurikhin

Research Theme
Growth of bulk single crystals and automatic
diameter control in Czochralski growth
Transparent ceramics with Spark Plasma

Dr. G. Boulon

Sintering method, and INTELUM workshop

Dr. V. Chani

Growth of bulk single crystals
Characterization of various scintillator

Dr. M. Nikl

materials, and INTELUM workshop

Dr. K.Bartosiewic

Dr. C.Levin

Growth and characterization of oxide
scintillator crystals, and INTELUM workshop
PET/MRI applications

Dr. M. Zhuravleva

Growth and characterization of halide
scintillator crystals, and JSPS186 workshop
Growth and characterization of various

Dr. L. Swiderski

scintillator crystals, and JSPS186 workshop
Growth and characterization of scintillator

CRYTUR (Czech Republic)

Dr. J. Houžvička

CERN (Switzerland)

Dr. E. Auffray

INTELUM meeting and workshop

CERN (Switzerland)

Dr. P. Lecoq

INTELUM meeting and workshop

Dr. E. Bourchesne

INTELUM meeting and workshop

Dr. M. Fasoli

INTELUM meeting and workshop

Dr. O. Sidletskiy

INTELUM meeting and workshop

Dr. S. Ochesanu

INTELUM meeting and workshop

University of California,
Berkeley (USA)
University of Milan(Italy)Institute for Scintillation
Materials (Ukraine)CRYTUR (Czech Republic)

and laser materials, and JSPS186 workshop

21

Seminar at Yoshikawa Laboratory 2015
Date

Affiliation

AugustStanford University,

25-26

California (USA)

Speaker

Title of speech
Positron emission tomography

Dr. C.Levinsystem technologies under study at
Stanford
Band gap and defect engineering

February

Institute of Physics CAS

6-8(Czech Republic)

strategies in the complex oxide

Pr. M. Nikl

scintillators optimization: thedifferences for Ce and Pr-doping

Luminescence Quenching andFebruary

Institute of Physics CAS

6-8(Czech Republic)

Scintillation Response in Ce3+
Dr. K.Bartosiewic

Doped GdxY3-xAl5O12 Single
Crystals22

Visits to International Collaborator 2015
Affiliation

Researcher

Period of stayInstitute of Physics CAS(Czech Republic)

Assoc. Pr. Kurosawa
Mr. ItoSeptember 27-30

Soltan Institute for Nuclear
Studies(Poland)

Assoc. Pr. Kamada

October 24-25

Assoc. Pr. Kurosawa
Mr. Murakami
Mr. Horiai, Mr. Yamaguchi
Miss. Tanaka

February 27-28

Pr. Yoshikawa
Assoc. Pr. Yokota
Assist. Pr. Kurosawa
Mr. Murakami
Mr. Horiai, Mr. Yamaguchi
Miss. Tanaka

March 1-4

European Organization for
Nuclear Research, CERN
(Switzerland)

CB Lyon1 University(France)23

List of Research collaborations24【大学・研究機関との共同研究】
Joint research with universities and research institutes in Japan1.

東京大学 共同研究

2.

大阪大学レーザーエネルギー学研究センター

Tokyo University
共同研究

Institute of Laser Engineering, Osaka University
3.

京都大学

4.

自然科学研究機構分子科学研究所

5.

国立研究開発法人放射線医学総合研究所

Kyoto University
大学共同利用施設 UVSOR
共同研究

National Institute of Radiological Sciences
6.

名古屋大学

共同研究

7.

名古屋工業大学

8.

山形大学

共同研究

Yamagata University

9.

山梨大学

共同研究

Yamanashi University

10. 信州大学

共同研究

Shinshu University

11. 千葉大学

共同研究

Chiba University

12. 広島大学

共同研究

Hiroshima University

共同研究

Nagoya University
Nagoya Institute of Technology

25

Research funds26

平成 27 年度 研究資金
Research funds (2015 fiscal year)【経済産業省－東北経済産業局】
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)
Funding Program for Strategic Supporting Industry, 2014
株式会社インテリジェント・コスモス研究機構からの再委託研究
Truster: Intelligent Cosmos Research Institute, Miyagi pref.
「Ce:GAGGシンチレータ結晶の量産化における大型結晶製造プロセスの低コスト化」“ Cost reduction of mass-production of large-sized Ce:GAGG scintillator crystals”
期間 Term: 2014.10 - 2017.3
本年度 Total:
6,430,000 yen for our team, 2015.4 - 2016.3
2. 中小企業による技術シーズの事業化・実用化事業のうち橋渡し研究支援事業
Funding Program for small business innovation research, 2014
株式会社東栄科学産業からの再委託研究
Truster: Toei Kagaku Co.Ltd「量産型マイクロＰＤ装置の開発」“Development of mass-production of micro-pulling-down apparatus”
期間 Term: 2014.11 - 2016.3
本年度 Total:
5,890,000 yen for our team, 2015.4 - 2016.3【NEDO プロジェクト】
New Energy and Industrial Technology Development Organization
1. 平成２６年度戦略的省エネルギー技術革新プログラム・実用化開発
Strategic Energy-saving Innovation Programs, 2014
東芝照明プレシジョン株式会社からの再委託研究
27

Truster: Toshiba Shomei Precision Corporation「新規圧電結晶を用いた低コスト・省電力タイミングデバイスの開発」“Development of new piezoelectric oscillator for reducing cost and power
consumption”
期間 Term: 2015.2 – 2016.6
本年度 Total: 45,400,000 yen for our team, 2015.4 – 2016.3
2. 平成２６年度新エネルギーベンチャー技術革新事業
Grand renewable Energy Innovation Programs, 2014
株式会社Ｃ＆Ａからの再委託研究
Truster: C&A Corporation「新圧電材料を用いた屈曲振動子等による発電技術の開発」“Development of power generation technology based on tuning fork vibrator using new
piezoelectric material”
期間 Term: 2014.12 – 2016.9
本年度 Total: 11,890,000 yen for our team, 2015.4 - 2016.3
3. 平成２７年度 未利用熱エネルギーの革新的活用技術研究開発
Thermal energy Management and Innovation Promotion, 2015
「共晶体構造を用いた高性能指数熱電酸化物材料の研究開発」“Research &development of highly efficient thermoelectric oxide material having
eutectic structure”
期間 Term: 2015.10 – 2017.3
本年度 Total:
5,000,000 yen for our team, 2015.4 - 2016.3
4. 平成２７年度 革新的ものづくり産業創出連携促進事業
Industrial Innovation Promotion Project, 2015
「次世代高分解能ＰＥＴ装置を拓く、新規高性能シンチレータ量産技術開発」“Development of mass-production technology of new high-performance scintillator for
next generation PET apparatus”
期間 Term: 2015.10 – 2018.3
本年度 Total: 29,400,000 yen for our team, 2015.4 - 2016.3
5. 平成２７年度 希少金属代替省エネ材料開発プロジェクト
Rare Metal Substitute Materials Development Project, 2015
株式会社Ｃ＆Ａからの再委託研究
28

Truster: C&A Corporation「白金フリーるつぼによる世界最高発光量シンチレータの開発および放射線検出器への応用」“Development of high-yield scintillator using Pt-free crucible, and its radiation
detector applications”
期間 Term: 2015.4 – 2016.3
本年度 Total:
6,870,000 yen for our team, 2015.4 - 2016.3【JST プロジェクト】
Japan Science and Technology Agency
1. JST研究成果展開事業
研究成果最適展開支援プログラム（A-STEP）ハイリスク挑戦タイプ
Foundation for High-risk challenging, 2014
キヤノン株式会社からの再委託研究
Truster: Canon Inc.
「Ｘ線位相イメージングを飛躍させる超高解像度、高感度Ｘ線検出器の実用化開発」“Development of ultra-high resolution and highly sensitive X-ray detector for
innovative X-ray phase imaging”
期間 Term: 2014.12 - 2016.11
本年度 Total: 21,400,000 yen for our team, 2015.4 - 2016.3
2. JST研究成果展開事業
研究成果最適展開支援プログラム（A-STEP）
実用化挑戦ステージ実用化挑戦タイプ （中小・ベンチャー開発）
Foundation for Small and Medium Enterprise Promotion, 2013
株式会社Ｃ＆Ａからの再委託研究
Truster: C&A Corporarion「高温域で劣化しない資源探査用シンチレーター」“Scintillator for Resources Exploration Equipment having high performance at hightemperature”
期間 Term: 2013.12 - 2017.3
本年度 Total: 15,300,000 yen for our team, 2015.4 - 2016.3
29

3. JST研究成果展開事業 【先端計測分析技術・機器開発】
Development of Systems and Technology for Advanced Measurement and Analysis
Technology, 2013
株式会社千代田テクノルからの再委託研究
Truster: Chiyoda Technol Corporation「高エネルギー分解能・高スループットの国産放射測定検査装置」“Development of radiometry tester having high energy resolution and high efficiency”
期間 Term: 2013.10 - 2016.3
本年度 Total:
2,000,000 yen for our team, 2015.4 - 2016.3
4. JST研究成果展開事業 （戦略テーマ重点タイプ）
Strategic Energy-saving Programs, 2015
「３次元圧電単結晶スプリングを用いた振動発電の研究開発」“Research & development of power generation technology based on coil spring
vibrator using 3D shaped piezoelectric crystal”
期間 Term: 2016.1 - 2021.3
本年度 Total:
2,700,000 yen for our team, 2016.1 - 2016.3
5. JST研究成果最適展開支援プログラム （A-STEP）シーズ顕在化タイプ
Adaptable and seamless technology transfer program through targetdrive R&D, 2013
「特定小電力無線向け弾性表面波フィルタの開発」“Development of SAW filter for specified low power radio application”
期間 Term: 2013.12 – 2017.3
本年度 Total:
1,450,000 yen for our team, 2015.4 - 2016.3
6. JST研究成果展開事業 （A-STEP）産業ニーズ対応タイプ
Adaptable and seamless technology transfer program through targetdrive R&D, 2015
「レーザー駆動指向性中性子の発生・制御及び検出に関する基盤技術開発」“Development of basic technology on generation, control and detection of laser-driven
directional neutron”
期間 Term: 2016.1 – 2020.3
本年度 Total:
6,200,000 yen for our team, 2016.1 - 2016.3

30

【復興庁】

Reconstruction Agency

1. 平成２４年度地域イノベーション戦略支援プログラム
Funding Program for “Invest Japan” promotion for reconstruction, 2012宮城県インテリジェントコスモス研究機構からの再委託プログラム
Truster: Intelligent Cosmos Research Institute, Miyagi pref.
「次世代自動車のための人材育成プログラム」“Manpower training program for innovation in automotive industry”
期間

Term:

本年度 Total:

2012.4 - 2017.3
8,2400,000 yen for our team, 2015.4 - 2016.3【厚生労働省科学研究費補助金】
Ministry of Health, Labour and Welfare
平成２５年度科学研究費助成
東京大学からの再委託研究
Truster: Tokyo University

Health Science Research Grants, 2013

(AMED)「非侵襲血中 RI 濃度測定を可能にするウエアラブル・サブミリ解像度 PET 装置の開発」“Development of wearable and sub-millimeter resolution type PET apparatus
that enables non-invasive measurement of RI concentration in blood”
期間 Term: 2013.4 - 2016.3
本年度 Total: 15,600,000 yen for our team, 2015.4 - 2016.3【日本学術振興会】Japan Society for the Promotion of Science
二国間交流事業 International Joint Research Program
期間 Term: 2013.4 - 2016.3
本年度 Total:
2,250,000 yen for our team, 2015.4 - 2016.3

31

【文部科学省科学研究費補助金】
Ministry of Education, Culture, Sports, Science and Technology
日本学術振興会 Japan Society for the Promotion of Science
科学研究費助成 Grants-in-Aid for Scientific Research

1. 挑戦的萌芽－分担
Grants-in-Aid for young scientists(Sprout)
吉川 彰(Akira Yoshikawa)2. 若手研究（Ａ）
Grants-in-Aid for young scientists(A)横田 有為 (Yuui Yokota)
3. 挑戦的萌芽
鎌田 圭

Grants-in-Aid for young scientists(Sprout)(Kei Kamada)

4. 挑戦的萌芽－分担
Grants-in-Aid for young scientists(Sprout)黒澤 俊介 (Shunsuke Kurosawea)
5. 若手研究（Ｂ）
Grants-in-Aid for young scientists(B)黒澤 俊介 (Shunsuke Kurosawea)
6. 基盤研究（Ｃ）－分担 Grants-in-Aid for young scientists(Scientific Research (C))
大橋 雄二 (Yuji Ohashi)
7. 特別研究員
山路 晃広

Fellowship(Akihiro Yamaji)32【企業・財団・個人からの受託・共同研究，寄付金および小型プロジェクト】
Funds from industry, foundations, personal donation and small project1.

キヤノン株式会社

Canon Inc.

2.

株式会社千代田テクノル

Chiyoda Technol Corporation

3.

浜松ホトニクス株式会社

Hamamatsu Photonics K.K

4.

株式会社トクヤマTokuyama Corporation

5.

古河機械金属株式会社

Furukawa Co. Ltd

6.

株式会社 東芝

TOSHIBA Corporation

7.

東芝照明プレシジョン株式会社 Toshiba Shomei Precision Corporation

8.

ＴＤＫ株式会社

TDK Corporation

9.

由利工業株式会社

Yurikogyo Co. Ltd

10. TANAKA ホールディングス株式会社 Tanaka Holdings Co. Ltd.

11. 株式会社フルヤ金属

Furuya Metal Co. Ltd.

12. 株式会社東栄科学産業

Toei Kagaku Co. Ltd

13. 三菱化学株式会社

Mitsubishi Chemical Corporation

14. 三菱電機株式会社

Mitsubishi Electric Corporation

15. 日立金属株式会社

Hitachi Metals, Ltd

16. 株式会社三幸

Sanko Corporation
33

17. 株式会社Ｃ＆Ａ

C&A Corporation

18. 株式会社 Piezo Studio

Piezo Studio Inc.

19. 日揮・実吉奨学会研究助成金

JGC-S scholarship Foundation

20. 材料科学技術振興財団研究助成金

MST scholarship Foundation

21. インテリジェントコスモス学術振興財団研究助成金

Intelligent Cosmos scholarship Foundation34平成 27 年度 特許出願リスト
List of Patent Application (2015 fiscal year)

1. 発光体及び放射線検出器
鎌田 圭、吉川

彰、黒澤

俊介、横田

有為、庄子

育宏

(Kei Kamada, Akira Yoshikawa, Shunsuke Kurosawa, Yuui Yokota, Yasuhiro Shoji)
2. 発光体及び放射線検出器
吉川 彰、黒澤

俊介、鎌田

圭、横田

有為、大橋

雄二、村上

力輝斗,

庄子 育宏
(Akira Yoshikawa, Shunsuke Kurosawa, Kei Kamada, Yuui Yokota, Yuji Ohashi,
Rikito Murakami, Yasuhiro Shoji)
3. 結晶材料及び放射線検出器
吉川 彰、鎌田

圭、横田

有為、黒澤

俊介、庄子

育宏

(Akira Yoshikawa, Kei Kamada, Yuui Yokota, Shunsuke Kurosawa, Yasuhiro Shoji)
4. 結晶材料及び放射線検出器
黒澤 俊介、吉川

彰、横田

有為、鎌田

圭、大橋

雄二、村上

力輝斗、

堀合 毅彦
(Shunsuke Kurosawa, Akira Yoshikawa, Yuui Yokota, Kei Kamada, Yuji Ohashi,
Rikito Murakami, Takahiko Horiai)

他

国内出願

６

件

35

List of conferences

36International conference and symposia
国際学会
1. Bulk Single Crystal Growth of Ca3Ta(Ga,Al)3Si2O14 Single Crystals
Akira Yoshikawa, Yasuhiro Shoji, Yuji Ohashi, Yuui Yokota, Tetsuo Kudo, Kei Kamada, Shunsuke
Kurosawa, Andrey Medvedev
2015 IEEE ISAF/ISIF/PFM
May. 24-27. 2015/ Biopolis, Matrix Building, Singapore(Poster)

2. Effects of Al Doping on Crystal Growth and Piezoelectric Properties of
Ca3NbGa3Si2O14 Single Crystals
Yuui Yokota, Tetsuo Kudo, Yuji Ohashi, Andrey Medvedev, Shunsuke Kurosawa, Kei Kamada,
Akira Yoshikawa
2015 IEEE ISAF/ISIF/PFM
May. 24-27. 2015/ Biopolis, Matrix Building, Singapore(Oral)

3. Homogeneity Evaluation of Ca3Ta(Ga0.5Al0.5)3Si2O14 Single Crystal by theLine-Focus-Beam Ultrasonic Material Characterization System
Yuji Ohashi, Tetsuo Kudo, Yuui Yokota, Yasuhiro Shoji, Shunsuke Kurosawa, Kei Kamada, Akira
Yoshikawa2015 IEEE ISAF/ISIF/PFM
May. 24-27. 2015/ Biopolis, Matrix Building, Singapore(Oral)

4. Growth of Ca3Ta(Ga1-xAlx)3Si2O14 Single Crystals and Their Piezoelectric
Properties
Tetsuo Kudo, Yuui Yokota, Yuji Ohashi, Yasuhiro Shoji, Kei Kamada, Andrey Medvedev, Shunsuke
Kurosawa, Akira Yoshikawa
2015 IEEE ISAF/ISIF/PFM
May. 24-27. 2015/ Biopolis, Matrix Building, Singapore(Oral)

5. Origin of UV-Induced Infrared Absorption Band in Ce:GAGG
R. Inaba, M. Kitaura, K. Kamada, S. Kurosawa, A. Ohnishi, K. Hara37

13th International Conference on Inorganic Scintillators and Their Applications (SCINT2015)
Jun. 7-12. 2015 / Berkeley, CA, USA(Poster / mini Oral)

6. Radiation Hardness of Gd-Based Oxide Scintillators
S. Kurosawa, R. Murakami, A. Yamaji, Y. Shoji, J. Pejchal, Y. Ohashi, Y. Yokota, K. Kamada, A.
Yoshikawa13th International Conference on Inorganic Scintillators and Their Applications (SCINT2015)
Jun. 7-12. 2015 / Berkeley, CA, USA(Poster / mini Oral)

7. Growth of Gadolinium Pyrosilicate Based Eutectics and Their Scintillation
K. Kamada, S. Kurosawa, Y. Yokota, J. Pejchal, Y. Ohashi, A. Yoshikawa
13th International Conference on Inorganic Scintillators and Their Applications (SCINT2015)
Jun. 7-12. 2015 / Berkeley, CA, USA(Poster / mini Oral)

8. Single Crystal Growth of Cerium and Praseodymium Doped YCa4O(BO3)3
K. Kamada, S. Kurosawa, Y. Yokota, J. Pejchal, Y. Ohashi, A. Yoshikawa
13th International Conference on Inorganic Scintillators and Their Applications (SCINT2015)
Jun. 7-12. 2015 / Berkeley, CA, USA(Poster / mini Oral)

9. Luminescent Study on Ce-Doped Hafnate Ceramics Samples Prepared by the
SPS
S. Kurosawa, H. Koichi, P. Jan, Y. Yokota, Y. Ohashi, K. Kamada, A. Yoshikawa
13th International Conference on Inorganic Scintillators and Their Applications (SCINT2015)
Jun. 7-12. 2015 / Berkeley, CA, USA(Poster / mini Oral)

10. Luminescence and Scintillation Properties of Li4SiO4 Single Crystals for
Neutron Scintillators
J. Pejchal, V. Babin, A. Beitlerova, S. Kurosawa, Y. Yokota, A. Yoshikawa, M. Nikl
13th International Conference on Inorganic Scintillators and Their Applications (SCINT2015)
Jun. 7-12. 2015 / Berkeley, CA, USA(Oral)
38

11. High Dynamic Range Monitoring of Slow Decay Components in Garnet-Based
P. Bruza, D. Panek, T. Parkman, K. Kamada, S. Kurosawa, A. Yoshikawa, J. Tous, J. Houzvicka, K.
Blazek, M. Kucera, M. Mueller, K. Mann, M. Nikl
13th International Conference on Inorganic Scintillators and Their Applications (SCINT2015)
Jun. 7-12. 2015 / Berkeley, CA, USA(Poster / mini Oral)

12. Luminescence Quenching and Scintillation Characteristics in (Y,Gd)3Al5O12Single Crystals Doped with Ce3+
K. Bartosiewicz, V. Babin, K. Kamada, A. Yoshikawa, J. Mares, A. Beitlerova, M. Nikl
13th International Conference on Inorganic Scintillators and Their Applications (SCINT2015)
Jun. 7-12. 2015 / Berkeley, CA, USA(Poster / mini Oral)

13. Growth and Luminescence Properties of Eu:SrI2 Single Crystals Prepared by
Modified Micro-Pulling-down Method
R. Kral, J. Pejchal, K. Nitsch, V. Jary, S. Kurosawa, Y. Yokota, M. Nikl, A. Yoshikawa
13th International Conference on Inorganic Scintillators and Their Applications (SCINT2015)
Jun. 7-12. 2015 / Berkeley, CA, USA(Poster / mini Oral)

14. Crystal Growth and Scintillation Properties of 1.5 Inch Eu:SrI2 Bulk Single
CrystalY. Yokota, S. Kurosawa, R. Kral, Y. Shoji, J. Pejchal, Y. Ohashi, K. Kamada, A. Yoshikawa
13th International Conference on Inorganic Scintillators and Their Applications (SCINT2015)
Jun. 7-12. 2015 / Berkeley, CA, USA(Poster / mini Oral)

15. Large Size Czochralski Growth and Scintillation Properties of Mg2+ CoDoped Ce:Gd3Ga3Al2O12
K. Kamada, Y. Shoji, V. V. Kochurikhin, A. Nagura, S. Okumura, S. Yamamoto, J. Y. Yeom, S.
Kurosawa, J. Pejchal, Y. Yokota, Y. Ohashi, M. Nikl, A. Yoshikawa
13th International Conference on Inorganic Scintillators and Their Applications (SCINT2015)
Jun. 7-12. 2015 / Berkeley, CA, USA(Oral)
39

16. Scintillation Properties of Large Size Ce:La-GPS Crystals Grown by the
Czochralski Process
S. Kurosawa, Y. Shoji, R. Murakami, M. Kitaura, V. Jary, J. Pejchal, Y. Ohashi, Y. Yokota, K.
Kamada, A. Onishi, M. Nikl, A. Yoshikawa
13th International Conference on Inorganic Scintillators and Their Applications (SCINT2015)
Jun. 7-12. 2015 / Berkeley, CA, USA(Oral)

17. ZnWO4
Hiroyuki Sekiya, Shunsuke Kurosawa, Akira Yoshikawa
CYGNUS2015 Workshop
Jun. 2-4. 2015 / Occidental College in Los Angeles, CA, USA(Oral)

18. Czochralski growth and properties
Gd2-xLax-yCeySi2O7 scintillator crystalsof

Ce:Gd3(Ga,Al)5O12

andYasuhiro Shoji, Shunsuke Kurosawa, Kei Kamada, Yuui Yokota, V.V.Kochurikhin, Akira Yoshikawa
11th International Conference on Ceramic Materials and Components for Energy and Environmental
Applications (11th CMCEE)
Jun. 14-19. 2015 / Vancouver, B.C., Canada(Oral / invited)

19. SMILE : Sub-MeV/MeV Gamma-ray Survey using Electron-Tracking
Compton Camera loaded on Balloon
A. Takada, T. Tanimori, H. Kubo, T. Mizumoto, Y. Mizumura, T. Sawano1, K. Nakamura, Y.
Matsuoka, S. Komura, S. Nakamura, T. Kishimoto, M. Oda, T. Takemura, S. Miyamoto, Y.
Nakamasu, K. Yoshikawa, J. D. Parker, K. Miuchi, S. Kurosawa
AAS High Energy Decadal Meeting
Jun. 29 – July 1. 2015 / Chicago(Poster)

20. Luminescent Properties Of Ce-Doped Gadolinium Pyrosilicate Crystals Grown
By The Floating Zone Method
Shunsuke Kurosawa, Toetsu Shishido, Takamasa Sugawara, Akiko Nomura, Kunio Yubuta, Yasuhiro
Shoji, Rikito Murakami, Yuui Yokota, Jan Pejchal, Yuji Ohashi, Kei Kamada, Akira Yoshikawa
40

2015 ACCGE-20
Aug. 2-7. 2015 / Big Sky, Montana, USA(Poster)

21. Czochralski Growth of 2 Inch Ca3Ta(Ga,Al)3Si2O14 Single Crystals For
Piezoelectric Application
Akira Yoshikawa, Yasuhiro Shoji, Yuji Ohashi, Yuui Yokota, Valery I. Chani, Masanori Kitahara,
Tetsuo Kudo, Kei Kamada, Shunsuke Kurosawa, Andrey Medvedev, Vladimir Kochurikhin
2015 ACCGE-20
Aug. 2-7. 2015 / Big Sky, Montana, USA(Poster)

22. Crystal Growth And Scintillation Properties Of Lu Substituted CeBr3 Single
Crystals
Tomoki Ito, Yuui Yokota, Shunsuke Kurosawa, Kei Kamada, Jan Pejchal, Yuji Ohashi, Akira
Yoshikawa2015 ACCGE-20
Aug. 2-7. 2015 / Big Sky, Montana, USA(Poster)

23. Crystal Growth Of 2inch Eu-Doped SrI2 Single Crystals For Scintillator
Application
Akira Yoshikawa, Yasuhiro Shoji, Yuui Yokota, Shunsuke Kurosawa, Shoki Hayasaka, Valery I.
Chani, Tomoki Ito, Kei Kamada, Yuji Ohashi, Vladimir V. Kochurikhin
2015 ACCGE-20
Aug. 2-7. 2015 / Big Sky, Montana, USA(Oral /invited)

24. Czochralski Growth Of 2inch Ce-Doped (La,Gd)2Si2O7 Single Crystals For
Scintillator Application
Akira Yoshikawa, Shunsuke Kurosawa, Yasuhiro Shoji, Valery I. Chani, Rikito Murakami, Kei
Kamada, Yuui Yokota, Yuji Ohashi, Vladimir Kochurikhin
2015 ACCGE-20
Aug. 2-7. 2015 / Big Sky, Montana, USA(Oral)

41

25. Luminescent Properties Of Cr-Doped Gallium Garnet Crystals Grown By The
Micro Pulling Down Method
Shunsuke Kurosawa, Akira Suzuki, Akihiro Yamaji, Kei Kamada, Jan Pejchal, Yuji Ohashi, Yuui
Yokota, Akira Yoshikawa
2015 ACCGE-20
Aug. 2-7. 2015 / Big Sky, Montana, USA(Poster)

26. Ca3NbGa3Si2O14 Piezoelectric Fiver Crystal For Electrical Generation From
Oscillation Grown By Micro-Pulling-Down Mathod
Masanori Kitahara, Yuui Yokota, Yuji Ohashi, Andrey Medvedev, Syunsuke Kurosawa, Kei Kamada,Osamu Eguchi, Akira Yoshikawa
2015 ACCGE-20
Aug. 2-7. 2015 / Big Sky, Montana, USA(Oral)

27. Growth Of 3 Inch Diameter Ce Doped Gd3Ga3Al2O12 Single Crystal
Scintillator
Kei Kamada, Yasuhiro Shoji, Vladimir V. Kochurikhin, Aya Nagura, Satoshi Okumura, Seiichi
Yamamoto, Shunsuke Kurosawa, Jan Pejchal, Yuui Yokota, Yuji Ohashi, Akira Yoshikawa
2015 ACCGE-20
Aug. 2-7. 2015 / Big Sky, Montana, USA(Oral)

28. Chemical Composition Characterization Of Ca3Ta(Ga0.5Al0.5)3Si2O14 Single
Crystal By The Line-Focus-Beam Ultrasonic Material Characterization System
Yuji Ohashi, Tetsuo Kudo, Yuui Yokota, Yasuhiro Shoji, Shunsuke Kurosawa, Kei Kamada, Akira
Yoshikawa2015 ACCGE-20
Aug. 2-7. 2015 / Big Sky, Montana, USA(Poster)

29. Scintillation Properties Of Ce:Gd3(Ga,Al)5O12 Single Crystals Grown By
Czochralski Method With Different Mg Co-Doping Concentrations
Kei Kamada, Aya Nagura, Martin Nikl, Satoshi Okumura, Seiichi Yamamoto, Shunsuke Kurosawa,
Yuui Yokota, Jan Pejchal, Yuji Ohashi, Akira Yoshikawa
42

2015 ACCGE-20
Aug. 2-7. 2015 / Big Sky, Montana, USA(Poster)

30. Growth And Scintillation Properties Of Alkali Metal And Ce Co-Doped
Lu3Al5O12 Scintillator
Kei Kamada, Vladimir V. Kochurikhin, Martin Nikl, Shunsuke Kurosawa, Jan Pejchal, Yuui Yokota,
Yuji Ohashi, Akira Yoshikawa
2015 ACCGE-20
Aug. 2-7. 2015 / Big Sky, Montana, USA(Oral)

31. Growth And Scintillation Properties Of Ce Doped YAG Single Crystal
Yuui Yokota, Shunsuke Kurosawa, Yuji Ohashi, Kei Kamada, Akira Yoshikawa
2015 ACCGE-20
Aug. 2-7. 2015 / Big Sky, Montana, USA(Poster)

32. Growth Of Ca3NbGa3Si2O14 Piezoelectric Crystals Grown From Congruent
Composition
Yuui Yokota, Yuji Ohashi, Shunsuke Kurosawa, Kei Kamada, Akira Yoshikawa
2015 ACCGE-20
Aug. 2-7. 2015 / Big Sky, Montana, USA(Poster)

33. Growth Of N-Benzyl-2-Methyl-4-Nitroaniline (BNA) Single Crystal Fiber For
Terahertz Generation
Kei Kamada, Yuma Takida, Hiroaki Minamide, Shunsuke Kurosawa, Yuui Yokota, Yuji Ohashi,
Akira Yoshikawa
2015 ACCGE-20
Aug. 2-7. 2015 / Big Sky, Montana, USA(Oral)

34. Crystal Growth, Optical And Scintillation Properties of Bulk Eu-doped SrI2
Single Crystals
Akira Yoshikawa, Yasuhiro Shoji, Yuui Yokota, Shunsuke Kurosawa, Valery I. Chani, Tomoki Ito,43

Kei Kamada, Yuji Ohashia, Vladimir Kochurikhin
The 4TH International Conference on the Physics of Optical Materials and Devices (ICOM2015)
Aug. 30- Sept. 4. 2015 / Budva, Montenegro(Oral / invited)

35. Co-doping Effects on Luminescence and Scintillation Properties of Ce doped(Lu,Gd)3(Ga,Al)5O12 Scintillator
Hiroaki Yamaguchi, Kei Kamada, Shunsuke Kurosawa, Jan Pejchal, Yasuhiro Shoji, Yuui Yokota,
Yuji Ohashi, Akira Yoshikawa
The 4TH International Conference on the Physics of Optical Materials and Devices (ICOM2015)
Aug. 30- Sept. 4. 2015 / Budva, Montenegro(Oral)

36. Growth and Luminescence Properties Of Ce doped LaCl3/CaCl2 Eutectic
Scintillator
Kei Kamada, Kosuke Hishinuma, Shunsuke Kurosawa, Akihiro Yamaji, Yasuhiro Shoji, Jan Pejchalb,
Yuji Ohashi, Yuui Yokota, and Akira Yoshikawa
The 4TH International Conference on the Physics of Optical Materials and Devices (ICOM2015)
Aug. 30- Sept. 4. 2015 / Budva, Montenegro(Poster)

37. Growth and Scintillation Properties of Eu and Tb Doped LiGdF4/LiF Eutectic
Scintillator for Neutron Detection
Kei Kamada, Kosuke Hishinuma, Shunsuke Kurosawa, Akihiro Yamaji, Yasuhiro Shoji, Jan Pejchal,
Yuji Ohashi, Yuui Yokota, and Akira Yoshikawa
The 4TH International Conference on the Physics of Optical Materials and Devices (ICOM2015)
Aug. 30- Sept. 4. 2015 / Budva, Montenegro(Poster)

38. Temperature Dependence of Y-Admix GAGG Scintillator Grown by the
Czochralski Process
Shunsuke Kurosawa, Mafuyu Seki, Kei Kamada, Jan Pejchal, Yasuhiro Shoji, Yuji Ohashi, Yuui
Yokota, Akira Yoshikawa
The 4TH International Conference on the Physics of Optical Materials and Devices (ICOM2015)
Aug. 30- Sept. 4. 2015 / Budva, Montenegro(Poster)4439. ASSIGNMENT OF Nd3+/Yb3+ ENERGY LEVELS IN THE C2 AND C3i
CENTERS OF Lu2O3 SESQUIOXIDE CERAMICS/CRYSTAL
Georges Boulon, Guillaume Alombert-Goget, Yannick Guyot, Malgorzata Guzik,Jan Pejchal, Akira
Yoshikawa, Akihiko Ito, Takashi Goto
The 4TH International Conference on the Physics of Optical Materials and Devices (ICOM2015)
Aug. 30- Sept. 4. 2015 / Budva, Montenegro(Oral / invited)

40. Band gap and defect engineering strategies in the Ce and Pr-doped complex
oxide scintillators optimization
M. Nikl, K. Kamada, S. Kurosawa, J. Pejchal, V. Jary, A. Yoshikawa
9th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation(LUMDETR 2015)
Sept. 20-25. 2015 / Tartu, Estonia(Oral / invited)

41. Growth and scintillation properties of alkali metal ions co-doped
Ce:Gd3Ga3Al2O12
K. Kamada, V. V. Kochurikhin, M. Nikl, S. Okumura, S. Yamamoto, J. Y. Yeom, Y Shouji, S.
Kurosawa, J. Pejchal, Yuui Yokota, Y. Ohashi, ○A. Yoshikawa
9th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation(LUMDETR 2015)
Sept. 20-25. 2015 / Tartu, Estonia(Oral)

42. Material design, crystal chemistry and crystal growth of high performancescintillators; GAGG, La-GPS, Eu:SrI2
A. Yoshikawa, M. Nikl, K. Kamada, S. Kurosawa, Y. Yokota, R. Murakami, T. Ito, Y. Ohashi, J.
Pejchal, R. Kral
9th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation(LUMDETR 2015)
Sept. 20-25. 2015 / Tartu, Estonia(Oral / invited)

43. Development of Cr-doped oxide crystals for red and near infra-red emission
45

scintillators by the Floating Zone method
S. Kurosawa, T. Shishido, A. Yamaji, R. Murakami, T. Horiai, T. Sugawara, A. Nomura, K. Yubuta, Y.
Shoji, Y. Yokota, J. Pejchal, Y. Ohashi, K. Kamada, A. Yoshikawa
9th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation(LUMDETR 2015)
Sept. 20-25. 2015 / Tartu, Estonia(Oral)

44. Luminescent properties of co-doping to SrHfO3 prepared by the spark plasma
sintering method
H. Chiba, S. Kurosawa, R. Murakami, A.Yamaji, Y. Ohashi, J. Pejchal, K. Kamada, Y. Yokota, A.
Yoshikawa9th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation(LUMDETR 2015)
Sept. 20-25. 2015 / Tartu, Estonia(Oral)

45. Effects of Pr doping on scintillation properties for CeBr3 crystals
T. Ito, Y. Yokota, S. Kurosawa, R. Kral, K. Kamada, J. Pejchal, Y. Ohashi, A. Yoshikawa
9th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation(LUMDETR 2015)
Sept. 20-25. 2015 / Tartu, Estonia(Oral)

46. Comparison of Gd2YAl2Ga3O12:Ce and Lu2YAl2Ga3O12:Ce single crystals
for gamma-ray detection
W. R. Chewpraditkul, N. Pattanaboonmee, W. Chewpraditkul, K. Kamada, A. Yoshikawa, M. Nikl
9th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation(LUMDETR 2015)
Sept. 20-25. 2015 / Tartu, Estonia(Poster)

47. Luminescent properties of Ce-doped lutetium pyrosilicate scintillators
T. Horiai, S. Kurosawa, R. Murakami, A. Yamaji, Y. Shoji, Y. Ohashi, J. Pejchal, K. Kamada, Y.
Yokota, A. Yoshikawa
9th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation46

(LUMDETR 2015)
Sept. 20-25. 2015 / Tartu, Estonia(Poster)

48. The effects on the non-proportionality response by co-doping alkali metal ionsfor Eu:SrI2 crystals grown by micro-pulling-down method
T. Ito, Y. Yokota, S. Kurosawa, R. Kral, K. Kamada, J. Pejchal, Y. Ohashi, A. Yoshikawa
9th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation(LUMDETR 2015)
Sept. 20-25. 2015 / Tartu, Estonia(Poster)

49. Single crystal growth of Ce doped Ce:Gd3(Sc, Al)5O12 by Czochralski method
and their scintillation properties
K. Kamada, V. V. Kochurikhin, A. Nagura, S. Kurosawa, J. Pejchal, Y. Yokota, Y. Ohashi, A.
Yoshikawa9th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation(LUMDETR 2015)
Sept. 20-25. 2015 / Tartu, Estonia(Poster)

50. Luminescent properties of Ce and Sc-admix GPS Scintillator
S. Kurosawa, T. Shishido, R. Murakami, T. Horiai, T. Sugawara, A. Nomura, K. Yubuta, Y. Shoji, Y.
Yokota, J. Pejchal, Y. Ohashi, K. Kamada, A. Yoshikawa
9th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation(LUMDETR 2015)
Sept. 20-25. 2015 / Tartu, Estonia(Poster)

51. Scintillation Properties of Co-doped (La, Gd)2Si2O7 Crystal Grown by the
Czochralski Method
R. Murakami, S. Kurosawa, Y. Shoji, V. Jary, Y. Ohashi, J. Pejchal, Y. Yokota, K. Kamada, M. Nikl,
A. Yoshikawa
9th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation(LUMDETR 2015)
Sept. 20-25. 2015 / Tartu, Estonia
47

(Poster)

52. Comparative studies of Gd3Al2.6Ga2.4O12:Ce and Gd3Al2Ga3O12:Ce single
crystal scintillators for gamma-ray detection
O. Sakthong,W. Chewpraditkul, T. Szczesniak, M. Moszynski, A. Yoshikawa, K. Kamada, M. Nikl
9th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation(LUMDETR 2015)
Sept. 20-25. 2015 / Tartu, Estonia(Poster)

53. Growth and scintillation properties of Sn-doped LiF and LiCaAlF6 neutron
scintillation crystals
C. Tanaka, Y. Yokota, S. Kurosawa, A. Yamaji, V. Jary, V. Babin, J. Pejchal, Y. Ohashi, K. Kamada,
M. Nikl, A. Yoshikawa
9th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation(LUMDETR 2015)
Sept. 20-25. 2015 / Tartu, Estonia(Poster)

54. Ce-concentration dependence of scintillation characteristics for Ce-doped (Gd,
La)2Si2O7 doped grown by the Czochralski process
S. Kurosawa, Y. Shoji, R. Murakami, T. Horiai, K. Kamada, J. Pejchal, Y. Ohashi, A. Yoshikawa
9th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation(LUMDETR 2015)
Sept. 20-25. 2015 / Tartu, Estonia(Poster)

55. Optical properties of large-size ceramic scintillators including hafnium
prepared by the spark plasma sintering process
S. Kurosawa, K. Harata, H. Chiba, K. Kamada, J. Pejchal, Y. Ohashi, A. Yoshikawaz
9th International Conference on Luminescent Detectors and Transformers of Ionizing Radiation(LUMDETR 2015)
Sept. 20-25. 2015 / Tartu, Estonia(Poster)

56. Growth and scintillation properties of Europoium doped eutectic scintillator
48

Kei Kamada, Kosuke Hishinuma, Shunsuke Kurosawa, Akihiro Yamaji, Yasuhiro Shoji, Jan Pejchal,Yuui Yokota, Yuji Ohashi, and Akira Yoshikawa
4th International Conference on RARE EARTH MATERIALS (REMAT)
Oct. 26-28. 2015 / Wroclaw, Poland(Poster)

57. Temperature depdence of opitcal propetirs of rare earth doped LaF3
Shunsuke Kurosawa, Kei Kamada, Yasuhiro Shoji, Akihiro Yamaji, Rikito Murakami, Takahiko
Horiai, Hiroyuki Chiba, Yuji Ohashi, Yuui Yokota, Akira Yoshikawa
4th International Conference on RARE EARTH MATERIALS (REMAT)
Oct. 26-28. 2015 / Wroclaw, Poland(Poster)

58. Measurements of Acoustical Physical Constants for Ca3Nb(Ga0.75Al0.25)
3Si2O14 Single Crystal Using the Ultrasonic Microspectroscopy System
Yuji Ohashi, Yuui Yokota, Tetsuo Kudo, Shunsuke Kurosawa, Kei Kamada, Akira Yoshikawa
2015 IEEE International Ultrasonics Symposium (IUS)
Oct. 21-24. 2015 / Taipei, Taiwan(Poster)

59. Evaluation of Acoustic Properties of CaTiO3-(K,Na)NbO3 Film Using
Microfabricated Structure
Ryosuke Kaneko, Michio Kadota, Yuji Ohashi, Jun-ichi Kushibiki, Shinsuke Ikeuchi, Shuji Tanaka
2015 IEEE International Ultrasonics Symposium (IUS)
Oct. 21-24. 2015 / Taipei, Taiwan(Oral)

60. Luminescence Properties of M/Ce Co-Doped GAGG Scintillator Grown by theMicro-Pulling-Down Method (M=Hf,Zr)
Y. Shoji, S. Kurosawa, K. Kamda, R. Murakami, H. Yamaguchi, J. Pejchal, Y. Ohashi, Y. Yokota, A.
Yoshikawa2015 IEEE Nuclear Science Symposium and Medical Imaging Conference together with the
Symposium on Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors (IEE
NSS/MIC/RTSD 2015)
Nov. 1-7. 2015 / SanDiego,CA,USA(Poster)49

61. Luminescent Properties of Rare Earth Doped La-GPS Crystals Grown by the Floating
Zone Method
Y. shoji, S. Kurosawa, T. Shishido, T. Sugawara, A. Nomura, K. Yubuta, R. Murakami, T. Horiai, J.
Pejcal, Y, Ohashi, K. Kamada, Y. Yokota, A. Yoshikawa
2015 IEEE Nuclear Science Symposium and Medical Imaging Conference together with the
Symposium on Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors (IEE
NSS/MIC/RTSD 2015)
Nov. 1-7. 2015 / SanDiego,CA,USA(Poster)

62. Luminscent Properties of Hafnate Transparent Ceramics Prepared by the SPS
MethodS. Kurosawa, K. Harata, H. Chiba, J. Pejachal, Y. Ohashi, K. Kamada, Y. Yokota, A. Yoshikawa
2015 IEEE Nuclear Science Symposium and Medical Imaging Conference together with the
Symposium on Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors (IEE
NSS/MIC/RTSD 2015)
Nov. 1-7. 2015 / SanDiego,CA,USA(Poster)

63. Radiation Hardness of Ce:GAGG and Ce:La-GPS Irradiated with Proton
Beam
S. Kurosawa, R. Murakami, A. Yamaji, T. Horiai, H. Chiba, H. Yamaguchi, Y. Shoji, J. Pejchal, Y.
Ohashi, Y. Yokota, K. Kamada, A. Yoshikawa
2015 IEEE Nuclear Science Symposium and Medical Imaging Conference together with the
Symposium on Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors (IEE
NSS/MIC/RTSD 2015)
Nov. 1-7. 2015 / SanDiego,CA,USA(Poster)

64. Scintillation Properties of 2-inch Ce:(La,Gd)2Si2O7 Crystals Grown by the
Czochralski Process
S. Kurosawa, Y. Shoji, R. Murakami, T. Horiai, Y. Ohashi, J. Pejchal, Y. Yokota, K. Kamada, A.
Yoshikawa2015 IEEE Nuclear Science Symposium and Medical Imaging Conference together with the
Symposium on Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors (IEE50

NSS/MIC/RTSD 2015)
Nov. 1-7. 2015 / SanDiego,CA,USA(Poster)

65. Development of Yb-Doped Oxide Scintillators for Infla-Red Application
A. Yoshikawa, S. Kurosawa, A. Yamaji, A. Suzuki, Y. Yokota, K. Kamada
2015 IEEE Nuclear Science Symposium and Medical Imaging Conference together with the
Symposium on Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors (IEE
NSS/MIC/RTSD 2015)
Nov. 1-7. 2015 / SanDiego,CA,USA(Poster)

66. Scintillation Properties of Pr Doped CeBr3 Crystals
A. Yoshikawa, T. Ito, T. Tokota, S. Kurosawa, Y. Ohashi, K. Kamada
2015 IEEE Nuclear Science Symposium and Medical Imaging Conference together with the
Symposium on Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors (IEE
NSS/MIC/RTSD 2015)
Nov. 1-7. 2015 / SanDiego,CA,USA(Poster)

67. Scintillation Properties of Large-Size Eu-Doped SrI2 Single Crystals and Its
Application
Y. Shoji, Y. Yokota, S. Kurosawa, S. Hayasaka, I. Chiba, V. I. Chani, V. Kochurikhin, T. Ito, J.
Pejchal, Y. Ohashi, K. Kamada, A. Yoshikawa
2015 IEEE Nuclear Science Symposium and Medical Imaging Conference together with the
Symposium on Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors (IEE
NSS/MIC/RTSD 2015)
Nov. 1-7. 2015 / SanDiego,CA,USA(Poster)

68. Scintillation Properties of Cr-Doped Oxide Crystal in the Infra-Red Region
S. Kurosawa, A. Yamaji, T. Shishido, A. Suzuki, T. Sugawara, A. Nomura, K. Yubuta, J. Pejchal, Y.
Yokota, K. Kamada, V. Kochurikhin, A. Yoshikawa
2015 IEEE Nuclear Science Symposium and Medical Imaging Conference together with the
Symposium on Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors (IEE
NSS/MIC/RTSD 2015)51

Nov. 1-7. 2015 / SanDiego,CA,USA(Poster)

69. Scintillation Properties of Ce:(La,Gd)2Si2O7 Single Crystals Co-Doped by
Divalent-Ions and Grown by the Czochralski Process
R. Murakami, S. ?Kurosawa, Y. Shoji, M. Kitaura, Y. Ohashi, J. Pejchal, K. Kamada, A. Ohnishi, A.
Yoshikawa2015 IEEE Nuclear Science Symposium and Medical Imaging Conference together with the
Symposium on Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors (IEE
NSS/MIC/RTSD 2015)
Nov. 1-7. 2015 / SanDiego,CA,USA(Poster)

70. Growth and Scintillation Proerties of Sr3NbGa3Si2O14 and Sr3TaGa3Si2O14
Single Crystals
Y. Yokota, S. Kurosawa, Y. Ohashi, K. Kamada, A. Yoshikawa
2015 IEEE Nuclear Science Symposium and Medical Imaging Conference together with the
Symposium on Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors (IEE
NSS/MIC/RTSD 2015)
Nov. 1-7. 2015 / SanDiego,CA,USA(Poster)

71. Czochralski Growth and Scintillation Properties of 3 Inch Size Mg2+
Co-Doped Ce:Gd3Ga3Al2O12 Single Crystal
K. Kamada, Y. Shoji, V. Kochurikhin, A. Nagura, S. Okumura, S. Yamamoto, J. Y. Yeom, S.
Kurosawa, J. Pejchal, Y. Yokota, Y. Ohashi, M. Nikl, A. Yoshikawa
2015 IEEE Nuclear Science Symposium and Medical Imaging Conference together with the
Symposium on Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors (IEE
NSS/MIC/RTSD 2015)
Nov. 1-7. 2015 / SanDiego,CA,USA(Poster)

72. Growth and Scintillation Properties of Phase-Separated Scintillator Fibers
Using Ternary Fluoride Eutectic Phase
K. Kamada, K. Hishinuma, S. Kurosawa, A. Yamaji, Y. Yokota, Y. Ohashi, A. Yoshikawa
2015 IEEE Nuclear Science Symposium and Medical Imaging Conference together with the52Symposium on Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors (IEE
NSS/MIC/RTSD 2015)
Nov. 1-7. 2015 / SanDiego,CA,USA(Poster)

73. Growth and Scintillation Properties of Ce Doped Gd3(Sc,Al)5O12 Single
CrystalK. Kamada, V. Kochurikhin, A. Nagura, S. Kurosawa, Y. Yokota, A. Yoshikawa
2015 IEEE Nuclear Science Symposium and Medical Imaging Conference together with the
Symposium on Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors (IEE
NSS/MIC/RTSD 2015)
Nov. 1-7. 2015 / SanDiego,CA,USA(Poster)

74. Crystal Growth and Scintillation Properties of Pr Doped SrI2 Single Crystals
Y. Yokota, T. Ito, S. Kurosawa, R. Kral, Y. Ohashi, K. Kamada, A. Yoshikawa
2015 IEEE Nuclear Science Symposium and Medical Imaging Conference together with the
Symposium on Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors (IEE
NSS/MIC/RTSD 2015)
Nov. 1-7. 2015 / SanDiego,CA,USA(Poster)

75. Evaluation of New Inorganic Scintillators for High Performance ToF PETApplications
V. Sanchez-Tembleque, L. M. Fraile, V. Vedia, M. Carmona, K. Kamada, Y. Shoji, A. Yoshikawa,(*)J. M. Udias
2015 IEEE Nuclear Science Symposium and Medical Imaging Conference together with the
Symposium on Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors (IEE
NSS/MIC/RTSD 2015)
Nov. 1-7. 2015 / SanDiego,CA,USA(Oral)

76. Growth and Scintillation Propeties of Sn-Doped LiF and LiCaAlF6 Single
Crystals for Neutron Scintillator
Y. Yokota, C. Tanaka, S. Kurosawa, A. Yamaji, V. Jary, V. Babin, J. Pejchal, Y. Ohashi, K. Kamada,
M. Nikl, A. Yoshikawa
53

2015 IEEE Nuclear Science Symposium and Medical Imaging Conference together with the
Symposium on Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors (IEE
NSS/MIC/RTSD 2015)
Nov. 1-7. 2015 / SanDiego,CA,USA(Poster)

77. A Handheld Gamma Imaging Probe for Intraoperative Use in Radio-Guided
Cancer Surgery
Y. Qi, G.Bizzozero, P. Ihnat, M. Petasecca, M. Lerch, S. Meikle, K. Kamada, Y. Shoji, A. Yoshikawa,
A. Rosenfeld
2015 IEEE Nuclear Science Symposium and Medical Imaging Conference together with the
Symposium on Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors (IEE
NSS/MIC/RTSD 2015)
Nov. 1-7. 2015 / SanDiego,CA,USA(Oral)

78. Growth and Scintillation Properties of Ce Doped Gd2Si2O7/SiO2 Eutectic as
Phase Separated Scintillators for High Resolution Imaging
A. Yoshikawa, K. Kamada, S. Kurosawa, Y. Yokota, Y. Ohashi
2015 IEEE Nuclear Science Symposium and Medical Imaging Conference together with the
Symposium on Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors (IEE
NSS/MIC/RTSD 2015)
Nov. 1-7. 2015 / SanDiego,CA,USA(Oral)

79. Improvement of Dopant Distribution on the Ce:Y3Al5O12 Single Crystals
Grown by Micro-Pulling down Method
Y. Yokota, Z. Zeng, Y. Ohashi, S. Kurosawa, K. Kamada, Y. Kawazoe, A. Yoshikawa
The 8th International Workshop on Modeling in Crystal Growth (IWMCG-8)
Nov. 15-18. 2015 / Spa, Belgium(Poster)

80. Over view of novel scintillation materials and its applications -FY2015Akira Yoshikawa, Yuui Yokota, Kei Kamada, Shunsuke Kurosawa, Yuji Ohashi, Yasuhiro Shoji,
Shoki Hayasaka, Hisakazu Nagato, Akihiro Yamaji, Tetsuo Kudo, Tomoki Ito, Rikito Murakami, Aya
Nagura, Chieko Tanaka, Hiroyuki Chiba, Takahiko Horiai, Hiroaki Yamaguchi
54

The 10th International Workshop on Ionizing Radiation. Monitoring (IWIRM10)
Dec. 5-6. 2015 / Oarai, Japan(Poster / mini Oral)

81. Radiation Hardness of Ce:(La, Gd)_2Si_2O_7 Scintillator
Shunsuke Kurosawa, Rikito Murakami, Akihiro Yamaji, Yasuhiro Shoji, Jan Pejchal, Yuji Ohashi,
Yuui Yokota, Kei Kamada, Akira Yoshikawa
the First International Symposium on Radiation Detectors and Their Uses (ISRD2016)
Jan. 18-21. 2015 / Tsukuba, Japan(Oral)

82.
Temperaturedependence
gadolinium-pyrosilicate scintillatorofluminescence

properties

forT. Horiai, S. Kurosawa, R. Murakami, A. Yamaji, Y. Shoji, Y. Ohashi, J. Pejchal, K. Kamada, Y.
Yokota and A. Yoshikawa
the First International Symposium on Radiation Detectors and Their Uses (ISRD2016)
Jan. 18-21. 2015 / Tsukuba, Japan(Poster)

83. Crystal growth and basic scintillation properties of Yb:LuF3 single crystal
Chieko Tanaka, Yuui Yokota, Shunsuke Kurosawa, Jan Pejchal, Rikito Murakami, Takahiko Horiai,
Hiroyuki Chiba, Yuji Ohashi, Kei Kamada and Akira Yoshikawa
the First International Symposium on Radiation Detectors and Their Uses (ISRD2016)
Jan. 18-21. 2015 / Tsukuba, Japan(Poster)

84. Optical and Scintillation Properties of Pr doped SrI2 Single Crystals Grown by Modified
Micro-Pulling-Down Method
Yuui Yokota, Shunsuke Kurosawa, Yuji Ohashi, Kei Kamada, Akira Yoshikawa
The 10th International Workshop on Ionizing Radiation. Monitoring (IWIRM10)
Dec. 5-6. 2015 / Oarai, Japan(Poster / mini Oral)

85. Growth and Luminescence Properties of Ce Doped LaCl3/CaCl2
Kei Kamada, Kosuke Hishinuma, Shunsuke Kurosawa, Akihiro Yamaji, Yasuhiro Shoji, Yuji Ohashi,
Yuui Yokota, and Akira Yoshikawa
55

The 10th International Workshop on Ionizing Radiation. Monitoring (IWIRM10)
Dec. 5-6. 2015 / Oarai, Japan(Poster / mini Oral)

86. Luminescent study on Zr Co-doped (La, Gd)2Si2O7 Crystal Grown by the
Czochralski Method
R. Murakami, S. Kurosawa, Y. Shoji, V. Jary, Y. Ohashi, J. Pejchal, Y. Yokota, K. Kamada, M. Nikl,
A. Yoshikawa
The 10th International Workshop on Ionizing Radiation. Monitoring (IWIRM10)
Dec. 5-6. 2015 / Oarai, Japan(Poster / mini Oral)

87. Co-doping Effect of Ce:SrHfO3 Transparent Ceramics on Optical andLuminescent Properties
H.Chiba, S.Kurosawa, R.Murakami, A.Yamaji, Y.Ohashi, Jan.Pejachal, K.Kamada, Y.Yokota, A.
YoshikawaThe 10th International Workshop on Ionizing Radiation. Monitoring (IWIRM10)
Dec. 5-6. 2015 / Oarai, Japan(Poster / mini Oral)

88. Luminescence study on Ce-doped lutetium pyrosilicate crystals
T. Horiai, S. Kurosawa, R. Murakami, A. Yamaji, Y. Shoji, Y. Ohashi, J. Pejchal, K. Kamada, Y.
Yokota and A. Yoshikawa
The 10th International Workshop on Ionizing Radiation. Monitoring (IWIRM10)
Dec. 5-6. 2015 / Oarai, Japan(Poster / mini Oral)

89. Co-doping effects on luminescence and scintillation properties of Ce doped(Lu,Gd)3(Ga,Al)5O12 crystals grown by the micro-pulling-down method
Hiroaki Yamaguchi, Kei Kamada, Shunsuke Kurosawa, Jan Pejchal, Yasuhiro Shoji, Yuui Yokota,
Yuji Ohashi, Akira Yoshikawa
The 10th International Workshop on Ionizing Radiation. Monitoring (IWIRM10)
Dec. 5-6. 2015 / Oarai, Japan(Poster / mini Oral)

90. Growth and Scintillation properties of Sn or Pb doped LiCaAlF6 single crystals
56

for neutron scintillator
C. Tanaka, Y. Yokota, S, Kurosawa, A. Yamaji, V. Jary, V. Babin, J. Pejchal, Y. Ohashi. K. Kamada,
M. Nikl, A. Yoshikawa
The 10th International Workshop on Ionizing Radiation. Monitoring (IWIRM10)
Dec. 5-6. 2015 / Oarai, Japan(Poster / mini Oral)

91. Development of an Imaging Detector with Red/infrared Scintillator
S. Kurosawa, A. Yamaji, R. Murakami, Y. Shoji, Y. Ohashi, ?Y. Yokota, K. Kamada, A. Yoshikawa
The 10th International Workshop on Ionizing Radiation. Monitoring (IWIRM10)
Dec. 5-6. 2015 / Oarai, Japan(Poster / mini Oral)

92. Crystal Growth and piezoelectric properties of Ca3Ta(Ga1-xAlx)3Si2O14
single crystals
T.Kudo, Y.Yokota, Y.Ohashi, Y.Shoji, K.Kamada, A.Medovedev, V.Kochurikhin, S.Kurosawa,
A.Yoshikawa
The Collaborative Conference on Crystal Growth (3CG 2015)
Nov. 14-17. 2015 / Hong Kong, China(Oral / invited)

93. Development of a Position-Sensitive Gamma-ray Camera Using Novel
Scintillator and an MPPC
S. Kurosawa, Y. Shoji, R. Murakami, T. Horiai, A. Yamaji, H. Chiba, ?Y. Ohashi, K. Kamada, Y.
Yokota, A. Yoshikawa
The 14th Vienna Conference on Instrumentation (VCI2016)
Nov. 15-19. 2015 / Vienna, Austria(Poster)

94. Design of Novel Scintillator Crystals And Their Crystal Growth Technologies
Akira Yoshikawa, Kei Kamada, Shunsuke Kurosawa, Yuui Yokota, Yuji Ohashi, Yasuhiro Shoji,
Valery I. Chani, Vladimir V. Kochurikhin, Martin Nikl
The 7TH International Symposium on Optical Materials (IS-OM7)
Feb. 29- Mar. 4. 2016 / Lyon, France(Oral / invited)57

95. Vacuum Ultraviolet Light Source and Photodetector Based on Fulorides
Shingo Ono, Masaki Tanemura, Kentaro Fukuda, Suyama Toshihisa, Takayuki

Yanagida,

Akira

Yoshikawa
The 7TH International Symposium on Optical Materials (IS-OM7)
Feb. 29- Mar. 4. 2016 / Lyon, France(Oral / invited)

96. Growth And Scintillation Properties of Halide Scintillator Single Crystals
Growth by Modified Micro-Pulling-Down Method
Yuui Yokota, Shunsuke Kurosawa, Yuji Ohashi, Kei Kamada, Akira Yoshikawa
The 7TH International Symposium on Optical Materials (IS-OM7)
Feb. 29- Mar. 4. 2016 / Lyon, France(Oral / invited)

97. Co-Doping Effects on Luminescence And Scintillation Properties of Ce Doped
Lu3(Ga,Al)5O12 Scintillator
Hiroaki Yamaguchi, Kei Kamada, Shunsuke Kurosawa, Jan Pejchal, Yasuhiro Shoji, Yuui Yokota,
Yuji Ohashi, Akira Yoshikawa
The 7TH International Symposium on Optical Materials (IS-OM7)
Feb. 29- Mar. 4. 2016 / Lyon, France(Oral)

98. Large Size Czochralski Growth and Scintillation Properties of Li+ Co-Doped
Ce:Gd3Ga3Al2O12 Single Crystals
Kei Kamada, Yasuhiro Shoji , Vladimir V. Kochurikhin Aya Nagura, Satoshi Okumura, Seiichi.
Yamamoto, Jung Yeol Yeom, Shunsuke Kurosawa, Jan Pejchal, Yuui Yokota,Yuji Ohashi, Martin
Nikl, Akira Yoshikawa
The 7TH International Symposium on Optical Materials (IS-OM7)
Feb. 29- Mar. 4. 2016 / Lyon, France(Oral)

99. Growth and Scintillation Properties of Eu Doped LiSrI3/LiI Eutectic
Scintillator
Kei Kamada, Yasuhiro Shoji , Shunsuke Kurosawa, Yuui Yokota,Yuji Ohashi, Akira Yoshikawa
The 7TH International Symposium on Optical Materials (IS-OM7)
Feb. 29- Mar. 4. 2016 / Lyon, France58

(Poster)

100. Crystal growth(Gd,La)2Si2O7

andluminescence

properties

of

Tb,Ce

co-doped

Rikito Murakami, Shunsuke Kurosawa, Yasuhiro Shoji, Jan Pejchal, Yuji Ohashi, Yuui Yokota, Kei
Kamada, Akira Yoshikawa
The 7TH International Symposium on Optical Materials (IS-OM7)
Feb. 29- Mar. 4. 2016 / Lyon, France(Poster)

101.Temperature-dependence of Ce-doped (La0.4, Gd0.6)2Si2O7 scintillators
Takahiko Horiai, Shunsuke Kurosawa, Rikito Murakami, Akihiro Yamaji, Yasuhiro Shoji, Yuji
Ohashi, Jan Pejchal, Kei Kamada, Yuui Yokota, Akira Yoshikawa
The 7TH International Symposium on Optical Materials (IS-OM7)
Feb. 29- Mar. 4. 2016 / Lyon, France(Poster)

102. Crystal Growth, Optical and Scintillation Properties of In Doped LiCaAlF6
Single Crystals For Neutron Scintillator
Chieko Tanaka, Yuui Yokota, Shunsuke Kurosawa, Akihiro Yamaji, Vitezslav Jary, Vladimir Babin,
Jan Pejchal, Yuji Ohashi, Kei Kamada, Martin Nikl, Akira Yoshikawa
The 7TH International Symposium on Optical Materials (IS-OM7)
Feb. 29- Mar. 4. 2016 / Lyon, France(Poster)

103. Evaluation of Electron Damage for Ce:La-GPS Scintillator
Shunsuke Kurosawa, Rikito Murakami, Takahiko Horiai, Hiroyuki Chiba, Akihiro Yamaji, Yasuhiro
Shoji, Yuji Ohashi, Kei Kamada, Yuui Yokota, Akira Yoshikawa
The 7TH International Symposium on Optical Materials (IS-OM7)
Feb. 29- Mar. 4. 2016 / Lyon, France(Poster)

104. Band Gap and Defect Engineering Strategies in the Complex Oxide Scintillators
Optimization: The Differences For Ce and Pr-Doping
Martin Nikl
The 7TH International Symposium on Optical Materials (IS-OM7)
59

The 7TH International Symposium on Optical Materials (IS-OM7)
Feb. 29- Mar. 4. 2016 / Lyon, France(Oral / invited)105. Luminescent Study on Rare Earth Doped Hafnium Based Transparent
Ceramics Prepared by Spark Plasma Sintering Method
Shunsuke Kurosawa, Koichi Harata, Hiroaki Chiba, Yuji Ohashi, Kei Kamada, Yuui Yokota, Akira
Yoshikawa
The 7TH International Symposium on Optical Materials (IS-OM7)
Feb. 29- Mar. 4. 2016 / Lyon, France(Oral / invited)

国内学会
1. 真空紫外域に発光する新規発光結晶の開発 (2014)
吉川 彰, Pejchal Jan, ○黒澤 俊介, 山路 晃広
レーザー研シンポジウム 2015－平成 26 年度共同研究成果報告会－
2015/04/08-09 / 大阪大学レーザー研（ポスター発表）

2．可視・紫外域での酸化物発光材料のエネルギー輸送に関する研究
横田 有為、 ○黒澤 俊介、鎌田 圭、Pejchal Jan
レーザー研シンポジウム 2015－平成 26 年度共同研究成果報告会－
2015/04/08-09 / 大阪大学レーザー研（ポスター発表）

3. Ca3B(Ga1-xAlx)3Si2O14 [B = Nb,Ta]のバルク単結晶育成とその特性評価
横田有為, 工藤哲男, 大橋雄二, Andrey Medvedev, 黒澤俊介, 鎌田圭, 吉川彰
第 32 回 強誘電体応用会議（FMA32）
2015/05/20-23 / コープイン京都（口頭発表）

4. Ce 添加(Gd, La)2Si2O7 ガドリニウムベースのシンチレータ開発とその発光特性
黒澤俊介
2015/07/21 / 山形大学セミナー60

（口頭発表）5. 平面超音波材料解析システムによる Ca3Nb(Ga0.75Al0.25)3Si2O14 単結晶の
音波関連物理定位数の測定
大橋雄二、横田有為、工藤哲男、黒澤俊介、鎌田圭、吉川彰
76ｔｈ,応用物理学会秋季学術講演会
2015/09/13-16 / 名古屋国際会議場（口頭発表）

6. Sn 添加 LiCaAlF6 中性子シンチレータ単結晶の結晶育成とシンチレーション
特性評価
田中智恵子、横田有為、黒澤俊介、山路晃広、Vitezslav Jary、Vladimir Babin、Jan Pejchal、
大橋雄二、鎌田圭、Martin Nikl、吉川彰
76ｔｈ,応用物理学会秋季学術講演会
2015/09/13-16 / 名古屋国際会議場（口頭発表）

7. CeBr3 シンチレータ単結晶における Lu 置換効果
伊藤友樹、横田有為、黒澤俊介、鎌田圭、Pejchal Jan、大橋雄二、吉川彰
76ｔｈ,応用物理学会秋季学術講演会
2015/09/13-16 / 名古屋国際会議場（口頭発表）

8. Ce 添加 LaCl3/CaCl2 共晶体の作製とシンチレーション特性評価
鎌田圭、菱沼康介、黒澤俊介、庄子育宏、横田有為、大橋雄二、吉川彰
76ｔｈ,応用物理学会秋季学術講演会
2015/09/13-16 / 名古屋国際会議場（口頭発表）

9. Ca3Ta(Gax,Al1-x)3Si2O14 圧電単結晶の育成と圧電特性における Al 置換効果
工藤哲男、横田有為、大橋雄二、庄子育宏、鎌田圭、黒澤俊介、吉川彰
76ｔｈ,応用物理学会秋季学術講演会
2015/09/13-16 /名古屋国際会議場（口頭発表）

10. Ca3Nb(Ga,Al)3Si2O14 の結晶育成とその物性評価
61

横田有為、大橋雄二、工藤哲男、黒澤俊介、鎌田圭、吉川彰
76ｔｈ,応用物理学会秋季学術講演会
2015/09/13-16 /名古屋国際会議場（口頭発表）

11. 長尺 Ca3NbGa3Si2O14 圧電結晶の育成
北原正典、大橋雄二、横田有為、工藤哲男、鎌田圭、黒澤俊介、吉川彰
76ｔｈ,応用物理学会秋季学術講演会
2015/09/13-16 /名古屋国際会議場（口頭発表）

12. アルカリ金属共添加 Ce:Gd3Ga3Al2O12 シンチレータの作製とシンチレー
ション特性評価
鎌田圭、庄子育宏、奥村聡、山本誠一、Yeom Jung Yeol, Kochurikhin Vladimir V.、黒澤俊介、
横田有為、大橋雄二、吉川彰
76ｔｈ,応用物理学会秋季学術講演会
2015/09/13-16 /名古屋国際会議場（口頭発表）

13. 1 および 2 インチ径 La-GPS 単結晶のシンチレーション特性評価
黒澤俊介、庄子育宏、村上力輝斗、堀合毅彦、山路晃広、大橋雄二、横田有為、鎌田圭、
吉川彰
76ｔｈ,応用物理学会秋季学術講演会
2015/09/13-16 /名古屋国際会議場（口頭発表）

14. Ce 添加(Lu,Gd)3(Ga,Al)5O12 シンチレータにおける発光およびシンチレー
タ特性に及ぼす共添加効果
山口大聡、鎌田圭、黒澤俊介、庄子育宏、横田有為、Jan Pejchal、大橋雄二、吉川彰
76ｔｈ,応用物理学会秋季学術講演会
2015/09/13-16 /名古屋国際会議場（口頭発表）

15. Ti 添加ガーネット酸化物シンチレータ結晶の近赤外発光特性
山路晃広、黒澤俊介、村上力輝斗、大橋雄二、鎌田圭、横田有為、吉川彰
76ｔｈ,応用物理学会秋季学術講演会
622015/09/13-16 /名古屋国際会議場（口頭発表）

16. 77K における GAGG 結晶のγ線応答とシンチレーション発光波長分布の測定木佐優太、前畑京介、鎌田圭、庄子育宏、吉川彰、安宗貴志、
76ｔｈ,応用物理学会秋季学術講演会
2015/09/13-16 /名古屋国際会議場（口頭発表）

17. SPS 法により作製した共添加 Ce:SrHfO3 透光性セラミックスの光学特性
知場啓志、黒澤俊介、原田晃一、村上力輝斗、山路晃広、大橋雄二、横田有為、吉川彰、Jan
Pejchal、鎌田圭
日本セラミックス協会 第 28 回秋季シンポジウム
2015/09/16-18 / 富山大学（五福キャンパス）（口頭発表）

18. 遷移金属添加（La,Gd）2Si2O7 焼結体の発光特性
村上力輝斗、黒澤俊介、庄子育宏、大橋雄二、横田有為、鎌田圭、吉川彰、Jan Pejchal
日本セラミックス協会 第 28 回秋季シンポジウム
2015/09/16-18 / 富山大学（五福キャンパス）（口頭発表）

19. Ce 賦活パイロシリケート型結晶の発光特性
堀合毅彦、黒澤俊介、村上力輝斗、山路晃広、庄子育宏、大橋雄二、鎌田圭、横田有為、
吉川彰、Jan Pejchal
日本セラミックス協会 第 28 回秋季シンポジウム
2015/09/16-18 / 富山大学（五福キャンパス）（口頭発表）

20. SPS 法によるシンチレータ材料の開発 IV
黒澤俊介、原田晃一、知場啓志、村上力輝斗、堀合毅彦、山路晃広、Jan Pejchal、大橋雄二、鎌田圭、横田有為、吉川彰
日本セラミックス協会 第 28 回秋季シンポジウム
2015/09/16-18 / 富山大学（五福キャンパス）（口頭発表）
63

21. ランガサイト型圧電結晶のこれまでの開発と今後の展開
横田有為、大橋雄二、工藤哲男、Andrey Medvedev、黒澤俊介、鎌田圭、吉川彰、庄子育宏、
井上憲司、小野寺晃
日本セラミックス協会 第 28 回秋季シンポジウム
2015/09/16-18 / 富山大学（五福キャンパス）（口頭発表 / 招待講演）

22. SMILE24：電子飛跡検出型コンプトンカメラが持つ偏光撮像性能の評価試験
古村翔太郎, 谷森達, 窪秀利, 高田淳史, Parker Joseph, 水村好貴, 水本哲矢, 園田真也, 友野
大, 中村輝石, 松岡佳大, 中村祥吾, 岸本哲朗, 小田真, 竹村泰斗, 宮本奨平, 身内賢太朗,
澤野達哉, 黒澤俊介
日本物理学会 2015 年秋季大会
2015/09/25-28 / 大阪市大（口頭発表）

23. SMILE25：電子飛跡検出型コンプトンカメラ(ETCC)の電子飛跡解析方法改善によるイメージングの改善
宮本奨平, 谷森達, 窪秀利, 高田淳史, Parker Joseph, 水村好貴, 水本哲矢, 園田真也, 友野大,岩城智, 中村輝石, 松岡佳大, 古村翔太郎, 中村祥吾, 岸本哲郎, 小田真, 竹村泰斗, 身内賢
太朗 A, 澤野達哉, 黒澤俊介
日本物理学会 2015 年秋季大会
2015/09/25-28 / 大阪市大（口頭発表）

24. SMILE26：ETCC の散乱平面決定精度の効果と到達予想感度
高田淳史, 谷森達, 窪秀利, Parker Joseph, 水村好貴, 水本哲矢, 園田真也, 友野大, 岩城智,中村輝石, 松岡佳大, 古村翔太郎, 中村祥吾, 岸本哲郎, 小田真, 竹村泰斗, 宮本奨平, 身内
賢太朗, 澤野達哉, 黒澤俊介
日本物理学会 2015 年秋季大会
2015/09/25-28 / 大阪市大（口頭発表）

25. 方向感度をもつ暗黒物質検出器の開発をめざした異方性を有するシンチレータ開発の検討黒澤俊介、関谷洋之、村上力輝斗、庄子育宏、大橋雄二、鎌田圭、横田有為、吉川彰
64日本物理学会 2015 年秋季大会
2015/09/25-28 / 大阪市大（口頭発表）

26. Mg 共添加 Ce:Gd3(Al,Ga)5O12 シンチレータの大型化とシンチレーション特性評価
鎌田圭、庄子育宏、名倉亜耶、奥村聡、山本誠一、Jung Yeol Yeom、Vladimir V. Kochurikhin、
黒澤俊介、横田有為、大橋雄二、吉川彰
第 45 回結晶成長国内会議（NCCG-45）
2015/10/19-21 / 北海道大学学術交流会館（口頭発表）

27. Mg 共添加 Ce:(Lu,Gd)3(Ga,Al)5O12 結晶のマイクロ引き下げ法による育成と評価
山口大聡、鎌田圭、黒澤俊介、庄子育宏、横田有為、大橋雄二、吉川彰
第 45 回結晶成長国内会議（NCCG-45）
2015/10/19-21 / 北海道大学学術交流会館（口頭発表）

28. 高融点金属ファイバー結晶の製造技術開発
横田有為、田中邦弘、坂入弘一、黒澤俊介、大橋雄二、吉川彰
第 45 回結晶成長国内会議（NCCG-45）
2015/10/19-21 / 北海道大学学術交流会館（口頭発表）

29. 新規単結晶材料の開発とその実用化に関する研究
吉川彰
第 45 回結晶成長国内会議（NCCG-45）
2015/10/19-21 / 北海道大学学術交流会館（口頭発表）

30. 浮遊帯溶融法による(Gd1-ｘCex)2Si2O7 単結晶の育成
松家康平、長尾雅則、綿打敬司、田中功、黒澤俊介、横田有為、吉川彰
第 45 回結晶成長国内会議（NCCG-45）
2015/10/19-21 / 北海道大学学術交流会館（ポスター発表）65

31. LiCaAlF6 シンチレータ単結晶における新規発光中心の検討
田中智恵子、横田有為、黒澤俊介、山路晃広、Vitezslav Jary、Vladimir Babin、Jan Pejchal、
大橋雄二、鎌田圭、Martin Nikl、吉川彰
第 45 回結晶成長国内会議（NCCG-45）
2015/10/19-21 / 北海道大学学術交流会館（ポスター発表）

32. ランガサイト型圧電単結晶のマイクロ引き下げ法による育成および評価
北原 正典, 大橋 雄二, 横田 有為, 井上 憲司, 工藤 哲男, 鎌田 圭, 黒澤 俊介, 吉川 彰
The 36th Symposium on UltraSonic Electronics (USE2015)
2015/11/05-07 / Tsukuba, Japan（ポスター発表）

33. Ca3Ta(Ga1-xAlx)3Si2O14 単結晶の音響特性における Al 置換量依存性
大橋 雄二, 工藤 哲男, 横田 有為, 庄子育宏, 黒澤 俊介, 鎌田 圭, 吉川 彰
The 36th Symposium on UltraSonic Electronics (USE2015)
2015/11/05-07 / Tsukuba, Japan（ポスター発表）

34. 長時間気球による MeV ガンマ線天文学の開拓
高田淳史, 谷森達, 窪秀利, 水本哲矢, 水村好貴, 古村翔太郎, 岸本哲朗, 竹村泰斗, 宮本奨平, 中増勇真, 吉川慶, 黒澤俊介, 澤野達哉
大気球シンポジウム
2015/11/05-06 / JAXA/ ISAS
（口頭発表）

35. 高性能シンチレータの開発動向
吉川彰
第 30 回 JFCA テクノフェスタ
2015/11/9 / メルパルク東京(口頭発表 / 招待講演)

36. 新規シンチレータ結晶の開発と世界の動向
吉川彰
光材料・応用技術研究会
662015/11/13 / マホロバ・マインズ三浦(口頭発表 / 招待講演)

37. ハロゲン化物シンチレータ単結晶の作製技術開発
横田 有為、 黒澤 俊介、鎌田 圭、伊藤 友樹、大橋 雄二、吉川 彰、庄子 育宏
10 回日本フラックス成長研究発表会
2015/12/11 / 信州大学
（口頭発表）

38. マイクロ引き下げ法を用いた CeBr3 単結晶の作製と Pr 添加効果
伊藤 友樹、横田 有為、黒澤 俊介、鎌田 圭、Pejchal Jan、Rober Kral、大橋 雄二、鎌田 圭、
吉川 彰
第 10 回日本フラックス成長研究発表会
2015/12/11 / 信州大学
（ポスター発表）

39. 無添加Ｙｂ2Si2O7 シンチレータの近赤外発光特性
堀合 毅彦、黒澤 俊介、村上 力輝斗、大橋 雄二、鎌田 圭、横田有為、吉川 彰
第 10 回日本フラックス成長研究発表会
2015/12/11 / 信州大学
（ポスター発表）

40. ペロブスカイト型化合物 RRh3B(R= 希土類元素)の合成、単結晶育成および評価
宍戸 統悦、湯蓋 邦夫、森 孝雄、田中 雅彦、岡田 繁、山崎 貴、野村 明子、菅原 孝昌、
佐原 亮二、林 好一、澤田 豊、手嶋 勝弥、大石 修治、川添 良幸、吉川 彰
第 10 回日本フラックス成長研究発表会
2015/12/11 / 信州大学
（ポスター発表）

41. ペロブスカイト型固溶体 RRh3B1-xCx(R= 希土類元素, 0≦ｘ≦1)の合成と評価
宍戸 統悦、湯蓋 邦夫、森 孝雄、田中 雅彦、岡田 繁、野村 明子、菅原 孝昌、吉川 彰
第 10 回日本フラックス成長研究発表会
2015/12/11 / 信州大学
（ポスター発表）6742. 高エネルギー物理学実験に向けた新規結晶の開発の四方山話
黒澤俊介
東北大学 ニュートリノセンター
2015/10/29（口頭発表 / 招待講演）

43. Lu2Si2O7 シンチレータ結晶の Yb 置換効果とその発光特性
堀合毅彦、 黒澤俊介, 村上力輝斗, 山路晃広, 庄子育宏, 大橋雄二, Pejchal Jan, 鎌田 圭, 横田有為, 吉川 彰
第 26 回光物性研究会
2015/12/11-12 / 神戸大学
（ポスター発表 / mini 口頭発表）

44. ヨウ化ストロンチウムシンチレータ結晶の大型化と発光特性
黒澤俊介, 横田有為, 庄子育宏, 長門久和, 早坂将輝, 大橋雄二, 鎌田 圭, 吉川彰
第 26 回光物性研究会
2015/12/11-12 / 神戸大学
（ポスター発表 / mini 口頭発表）

45. 2 価陽イオン共添加 Ce:(Gd, La)2Si2O7 単結晶の シンチレーション特性
村上力輝斗, 黒澤俊介, 庄子育宏, 横田有為, Jan Pejchal, 大橋雄二, 鎌田 圭, 吉川 彰
第 26 回光物性研究会
2015/12/11-12 / 神戸大学
（ポスター発表 / mini 口頭発表

46. Growth and luminescence propertirs of Ce doped LaCl3/CaCl2?eutectic
scintillator
Kei Kamada, Kosuke Hishinuma, Yasuhiro Shoji, Shunsuke Kurosawa, Akihiro Yamaji, Yuui
Yokota,Yuji Ohashi, Akira Yoshikawa
第 26 回光物性研究会
2015/12/11-12 / 神戸大学
（ポスター発表 / mini 口頭発表

47. SPS 法によるシンチレータ材料の開発 V黒澤俊介、原田晃一、知場啓志、村上力輝斗、堀合毅彦、山路晃宏、Pejchal Jan、大橋雄二、
68

鎌田圭、横田有為、吉川彰
日本セラミックス協会 2016 年年会
2016/03/14-16 / 早稲田大学

西早稲田キャンパス

（口頭発表）

48. 相分離構造を有する超高解像度シンチレータ
安居伸浩、大橋良太、鎌田 圭、吉川 彰、田透
第 63 回応用物理学会春季学術講演会
2015/03/19-22 / 東工大 大岡山キャンパス（口頭発表）

49. 超高解像度相分離シンチレータを用いた位相格子の自己像直接撮像による
X 線位相イメージング
大橋良太、安居伸浩、鎌田圭、吉川彰、田透
第 63 回応用物理学会春季学術講演会
2015/03/19-22 / 東工大 大岡山キャンパス（口頭発表）

50. マイクロ引き下げ法で作製した Ce:Y3Al5O12 単結晶における面内 Ce 偏析の改善
横田有為、ZengZhong、大橋雄二、黒澤俊介、鎌田圭,、川添良幸、吉川彰
第 63 回応用物理学会春季学術講演会
2015/03/19-22 / 東工大 大岡山キャンパス（口頭発表）

51. 集束ビーム超音波材料解析システムを用いた X-cut ランガサイト型単結晶の方位決定の実験的検討
大橋雄二、横田 有為、工藤 哲男、庄子 育宏、鎌田 圭,、黒澤 俊介、吉川 彰
第 63 回応用物理学会春季学術講演会
2015/03/19-22 / 東工大 大岡山キャンパス（口頭発表）

52. Ca3Ta(Ga1-xAlx)3Si2O14(x=0,0.25,0.5,0.75)圧電単結晶における音響特性のAl 置換量依存性
工藤哲男、○横田有為、大橋雄二、庄子育宏,、鎌田圭、黒澤俊介、吉川彰
第 63 回応用物理学会春季学術講演会
692015/03/19-22 / 東工大 大岡山キャンパス（口頭発表）

53. 77 K における GAGG 結晶のγ線に対するシンチレーション応答測定
都留由紀子、前畑京介、木佐優太、鎌田圭、庄子育宏、吉川彰
第 63 回応用物理学会春季学術講演会
2015/03/19-22 / 東工大 大岡山キャンパス（口頭発表）

54. Mg 共添加 Ce:Lu3(Ga,Al)5O12 シンチレータの作製とシンチレーション特性
評価
山口大聡、鎌田圭、庄子育宏、黒澤俊介、横田有為、大橋雄二、吉川彰
第 63 回応用物理学会春季学術講演会
2015/03/19-22 / 東工大 大岡山キャンパス（口頭発表）

55. Na 共添加 Eu:LiCaAlF6 中性子シンチレータ単結晶における蛍光およびシン
チレーション特性の Na 濃度依存性
田中智恵子、横田有為、黒澤俊介、山路晃広、大橋雄二、鎌田圭、吉川彰
第 63 回応用物理学会春季学術講演会
2015/03/19-22 / 東工大 大岡山キャンパス（口頭発表）

56. アルカリ金属元素を共添加した Eu:SrI2 結晶におけるシンチレーション特性伊藤友樹、横田有為、黒澤俊介、KralRobert、鎌田圭、JanPejchal、大橋雄二、吉川彰
第 63 回応用物理学会春季学術講演会
2015/03/19-22 / 東工大 大岡山キャンパス（口頭発表）

57. ガーネット型酸化物シンチレータ結晶の作製と近赤外発光特性評価
山路晃広、黒澤俊介、村上力輝斗、大橋雄二、鎌田圭、横田有為、吉川彰
第 63 回応用物理学会春季学術講演会
2015/03/19-22 / 東工大 大岡山キャンパス（口頭発表）

70

58. Ce 賦活(Gd, La)2Si2O7 シンチレータの温度特性
堀合毅彦、黒澤俊介、村上力輝斗、山路晃広、庄子育宏、大橋雄二、鎌田圭、横田有為、
吉川彰
第 63 回応用物理学会春季学術講演会
2015/03/19-22 / 東工大 大岡山キャンパス（口頭発表）

59. 2 インチ径 Eu 添加 SrI2 単結晶のシンチレーション特性評価とその応用
黒澤俊介、庄子育宏、酒井昭宏、横田有為、早坂将輝、長門和久、太田朗生、柳田由香、
大橋雄二、鎌田圭、竹内宣博、吉川彰
第 63 回応用物理学会春季学術講演会
2015/03/19-22 / 東工大 大岡山キャンパス（口頭発表）

60. 2 インチ径 SrI2(Eu)単結晶の育成と特性評価
庄子育宏、黒澤俊介、横田有為、早坂将輝、長門和久、鎌田圭、酒井昭宏、太田朗生、柳田由香、大橋雄二、竹内宣博、吉川彰
第 63 回応用物理学会春季学術講演会
2015/03/19-22 / 東工大 大岡山キャンパス（口頭発表）

61. GdAlO3/Al2O3 共晶体の大面積化
鎌田圭、山口大聡、安居伸浩、大橋良太、田透、黒澤俊介、庄子育宏、横田有為、大橋雄二、吉川彰
第 63 回応用物理学会春季学術講演会
2015/03/19-22 / 東工大 大岡山キャンパス（口頭発表）

62. 核ガンマ線全天撮像分光で探る Ia 型超新星の起源
水村好貴, 谷森達, 高田淳史, 岸本哲朗, 古村翔太郎, 宮本奨平, 水本哲矢, 中増勇真, 園田
真也, 竹村泰斗, 吉川慶, 窪秀利, 黒澤俊介, 身内賢太朗, 澤野達哉, 松岡佳大, 中村輝石,
Parker Joseph, 友野大
日本物理学会 第 71 回年次大会
2015/03/19-22 / 東北学院大学 泉キャンパス（口頭発表）

7163. 方向感度をもつ暗黒物質検出器の開発をめざした異方性を有するシンチレータ開発の検討 II
黒澤俊介, 関谷洋之, 村上力輝斗, 堀合毅彦, 庄子育宏, 大橋雄二, 鎌田圭, 横田有為, 吉川彰
日本物理学会 第 71 回年次大会
2015/03/19-22 / 東北学院大学 泉キャンパス（口頭発表）

64. GAGG を用いた荷電粒子検出器の性能評価
越川亜美, 川畑貴裕, 古野達也, 津村美保, 村田求基, 森本貴博, 黒澤俊介, 山路晃宏, 村上
力輝斗, 堀合毅彦, 知場啓志
日本物理学会 第 71 回年次大会
2015/03/19-22 / 東北学院大学 泉キャンパス（口頭発表）

65. SMILE27：電子飛跡検出型コンプトンカメラ(ETCC)の偏光観測性能の入射角依存性
岸本哲朗, 古村翔太郎, 高田淳史, 水村好貴, 窪秀利, 松岡佳大, 宮本奨平, 水本哲矢, 中増勇真, 中村輝石, Parker Joseph, 園田真也, 竹村泰斗, 谷森達, 友野大, 吉川慶, 黒澤俊介, 身内賢太朗, 澤野達哉
日本物理学会 第 71 回年次大会
2015/03/19-22 / 東北学院大学 泉キャンパス（口頭発表）

66. SMILE28：電子飛跡検出型コンプトンカメラにおけるデッドタイム削減ための新トリガー開発
吉川慶, 高田淳史, 水本哲矢, 岸本哲朗, 古村翔太郎, 窪秀利, 松岡佳大, 宮本奨平, 水村好貴, 中増勇真, 中村輝石, Parker Joseph, 園田真也, 竹村泰斗, 谷森達, 友野大, 黒澤俊介, 身内賢太朗, 澤野達哉
日本物理学会 第 71 回年次大会
2015/03/19-22 / 東北学院大学 泉キャンパス（口頭発表）

67. SMILE29：電子飛跡検出型コンプトンカメラの角度分解能向上に向けたシンチレーションカメラの開発
中増勇真, 高田淳史, 岸本哲朗, 古村翔太郎, 窪秀利, 松岡佳大, 宮本奨平, 水本哲矢, 水村72

好貴, 中村輝石, Parker Joseph, 園田真也, 竹村泰斗, 谷森達, 友野大, 吉川慶, 黒澤俊介, 身内賢太朗, 澤野達哉, 鎌田圭, 庄子育宏, 吉川彰
日本物理学会 第 71 回年次大会
2015/03/19-22 / 東北学院大学 泉キャンパス（口頭発表）

68. SMILE30：ETCC による長時間気球観測によって可能になる宇宙イメージン
グ核分光観測谷森達, 高田淳史, 岸本哲朗, 古村翔太郎, 窪秀利, 松岡佳大, 宮本奨平, 水本哲矢, 水村好貴, 中村輝石, 中増勇真, Parker Joseph, 園田真也, 竹村泰斗, 友野大, 吉川慶, 黒澤俊介, 身内賢太朗, 澤野達哉
日本物理学会 第 71 回年次大会
2015/03/19-22 / 東北学院大学 泉キャンパス（口頭発表）

73

List of abstracts

74

JOURNAL

OF

LUMINESCENCE 169, 682, Published: JAN2016

Luminescence mechanism in doubly Gd, Nd-codoped fluoride crystals for VUV scintillators
Jan Pejchala, b, Kentaro Fukudac, Vladimir Babinb, Shunsuke Kurosawaa, d ,Yuui Yokotaa, Akira Yoshikawaa, d, Martin
Niklb
a NICHe, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, 9808579 Japanb Institute of Physics AS CR, Cukrovarnicka 10, Prague 6,16200, Czech Republicc Tokuyama Corporation, Kasumigaseki Common Gate West Tower 2-1, Kasumigaseki 3-chome, Chiyoda-ku,
Tokyo, 1008983, Japand Institute for Materials Research, 2-1-1 Katahira, Aoba-ku, Sendai, 9808577 Japan

Abstract:
The Nd-doped, Gd-doped and doubly Nd, Gd-codoped BaLu1.2Y0.8F8 (BaLuYF) and LuF3 single crystals weregrown by a micro-pulling-down method. Their photoluminescence, radioluminescence and alpha-ray-excited pulseheight spectra were studied in the vacuum-ultra-violet (VUV) region to confirm their possible application as fast
VUV scintillators. Complementary photoluminescence measurements in the ultra-violet/visible spectral region were
performed as well. The possibility of scintillation performance improvement by Gd codoping was tested. The overall
scintillation efficiency of BaLuYF:Nd1% was comparable to that of the LaF3:Nd8% reference sample and only
slight improvement was observed after Gd1% codoping. The positive effect of Gd codoping was confirmed forhigher dopant concentrations. This was explained by an energy transfer from the high-energy Gd3+ 4f 2G(0)7/2 levelto the Nd3+ 5d state. On the other hand, pulse-height spectra showed degradation of the light yield under alpha-ray
excitation, which was explained by introduction of slow components due to Gd codoping. On the other hand, no
positive effect of Gd codoping was found for the overall scintillation efficiency of Nd-doped LuF3, despite the sameenergy transfer process was confirmed. Slight improvement of the light yield under alpha-ray excitation was
confirmed.

E-mail Address:
pejchal@fzu.cz

Site Address:
http://www.sciencedirect.com/science/article/pii/S0022231315001921

75

JOURNAL OF LUMINESCENCE 170, 513, Published: FEB2016

Assignment of Yb3+ energy levels in the C2 and C3i centers of Lu2O3 sesquioxide either asceramics or as crystal
Y. Guyota, M. Guzikb, G. Alombert-Gogeta, J. Pejchalc, A. Yoshikawac, A. Itoc, T. Gotoc, G. Boulona
a Institute Light Matter (ILM), UMR5306 CNRS-UCB Lyon1, University of Lyon, 69622 Villeurbanne, Franceb Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Polandc Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan

Abstract:
Absorption spectroscopy at 4 K, site selective spectroscopy technique at 77 K, decays associated to the applicationsof barycentre plot law (Antic-Fidancev) and crystal-field strength concept (Auzel and Malta) are used to attempt theassignment of Yb3+ energy levels in C3i and C2 centers of Lu2O3 sesquioxide structure either in ceramics or in crystal
as potential laser materials.

E-mail Address:
georges.boulon@univ-lyon1.fr

Site Address:
http://www.sciencedirect.com/science/article/pii/S002223131500201X

76

JOURNAL OF LUMINESCENCE 169, 387, Published: JAN2016

Crystal growth and scintillation properties of multi-component oxide single crystals:
Ce:GGAG and Ce:La-GPS
A. Yoshikawaa, b, c, , , K. Kamadab, c, S. Kurosawaa, b, Y. Shojia, c, Y. Yokotab, V.I. Chania, M. Nikld
a Institute for Materials Research (IMR), Tohoku University, Sendai 980-8577, Japanb New Industry Creation Hatchery Center (NICHe), Tohoku University, Sendai 980-8579, Japanc C&A Corporation, 6-6-40 Aramaki Aza Aoba, Aoba-ku, Sendai 980-8579, Japand Institute of Physics, AS CR, Cukrovarnická 10, 162 53 Prague, Czech Republic

Abstract:
Crystal growth by micro-pulling-down, Czochralski, and floating zone methods and scintillation
properties of Ce:Gd3(Ga,Al)5O12 (Ce:GGAG) multi-component oxide garnets, and Ce:Gd2Si2O7(Ce:GPS) or Ce:(La,Gd)2Si2O7 (Ce:La-GPS) pyro-silicates are reviewed. GGAG crystals
demonstrated practically linear dependences of some of the parameters including lattice
constant, emission wavelength, and band gap on Ga content. However, emission intensity, lightyield and energy resolution showed maxima for intermediate compositions. GGAG crystals had
the highest light yield of 56,000 photon/MeV for Ga content of 2.7 atoms per garnet formula unit.
Similarly the light yield and energy resolution of La-GPS showed the highest values of
40,000 photon/MeV and 4.4%@662 keV, respectively, for La-GPS containing 10% of La. Moreover,
La-GPS demonstrated stable scintillation performance up to 200 °C.
E-mail Address:
yoshikawa@imr.tohoku.ac.jp

Site Address:
http://www.sciencedirect.com/science/article/pii/S0022231315001854

77

OPT EXPRESS 23, 13210, Published: MAY2015

Characterization of the lasing properties of a 5%Yb doped Lu₂SiO₅ crystal along its threeprincipal dielectric axes.
Toci G1, Pirri A2, Beitlerova A3, Shoji Y4, Yoshikawa A4,5, Hybler J3, Nikl M3, Vannini M.1
1 C.N.R.-National Research Council, Istituto Nazionale di Ottica Via Madonna del Piano 10, I-50019 Sesto
Fiorentino (FI), Italy
2 C.N.R.-National Research Council, Institute of Applied Physics “Nello Carrara” Via Madonna del Piano 10, I50019 Sesto Fiorentino (FI), Italy
3Institute of Physics Academy of Sciences of the Czech Republic, Cukrovarnicka 10, Prague 162 53, Czech
Republic
4Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aobaku, Sendai, 980-8577 Japan
5New Industry Creation Hatchery Center (NICHe), Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai,
Miyagi 980-8579, Japan

Abstract:
The laser performance of a 5% Yb doped Lu2SiO5 (Yb:LSO) has been investigated in quasi continuous-wave
pumping regime along the three principal dielectric axes of the crystal, to obtain a complete characterization of its
laser properties. The comparison among the obtained results for differently polarized lasers, in term of relative slope
efficiency and absolute efficiency, allows the exploitability of different orientations of the material in order to be
determined to obtain efficient laser sources. The laser slope efficiency and the energy conversion efficiency weresimilar for emission polarized along the three indicatrix axes, with noticeable maximum values of slope efficiency
around 90% for polarization along the Y and Z axes. Tunable laser action has been obtained in the range 990 nm 1084 nm, with sizeable differences in the shape of the tuning curve for polarization along the X, Y and Z axes. In
particular, the tuning for polarization along the Z axis is relatively flat and uniform in the range 1023 nm - 1083 nm.

E-mail Address:
a.pirri@ifac.cnr.it

Site Address:
https://www.osapublishing.org/oe/abstract.cfm?uri=oe-23-10-13210

78

JOURNAL OF LUMINESCENCE 169, 811, Published: JAN2016

Growth and scintillation properties of praseodymium doped (Lu,Gd)3(Ga,Al)5O12 single
crystals
Kei Kamadaa, b, , , Martin Niklc, Shunsuke Kurosawaa, d, Yasuhiro Shojib, d, Jan Pejchala, c, Yuji Ohashid, Yuui
Yokotaa, Akira Yoshikawaa, b, d
a Tohoku University, New Industry Creation Hatchery Center, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi
980-8579, Japanb C&A Corporation, T-Biz, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japanc Institute of Physics AS CR, Cukrovarnicka 10, 16253 Prague, Czech Republicd Tohoku University, Institute for Material Reseach, 2-1-1 Katahira Aoba-ku, Sendai, Miyagi 980-8577, Japan

Abstract:
Pr doped (Lu,Gd)3(Ga,Al)5O12 single crystals were grown by the micro-pulling down (μ-PD) method. The crystals
were greenish and transparent with 3.0 mm in diameter, 10–30 mm in length. Neither visible inclusions nor cracks
were observed. Luminescence and scintillation properties were measured. The substitution at the Al 3+ sites by Ga3+
in garnet structure has been studied. The Pr3+ 5d–4f emission is observed within 300–380 nm wavelength
superposed with 312 nm emission line of Gd3+. Pr0.2%:Lu2.5Gd1Ga3Al2O12 shows highest emission intensity. The
light yield of Pr0.2%:Lu2.5Gd0.5Ga2Al3O12 sample with diameter 3 mm×1 mm size was around 8000 ph/MeV. Twoexponential approximations of scintillation decay showed 39.6 ns (30.6%) and 151 ns (69.4%) decay times.

E-mail Address:
kamada@imr.tohoku.ac.jp

Site Address:
http://www.sciencedirect.com/science/article/pii/S0022231315003117

79

THE ASTROPHYSICAL JOURNAL 810, 28, Published:SEP2015

An Electron-Tracking Compton Telescope for a Survey of the Deep Universe by MeV
gamma-rays
T. Tanimori1,2, H. Kubo1, A. Takada1, S. Iwaki1, S. Komura1, S. Kurosawa3, Y. Matsuoka1, K. Miuchi4, S.
Miyamoto1, T. Mizumoto1, Y. Mizumura1,2, K. Nakamura1, S. Nakamura1, M. Oda1, J. D. Parker1, T. Sawano1, S.
Sonoda1, T. Takemura1, D. Tomono1, and K. Ueno1
1 Department of Physics, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
2 Unit of Synergetic Studies for Space, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502,
Japan
3 Institute of Materials Research, Tohoku University, 980-8577 Sendai, Japan
4 Department of Physics, Kobe University, 658-8501 Kobe, Japan

Abstract:
Photon imaging for MeV gammas has serious difficulties due to huge backgrounds and unclearness in images,
which originate from incompleteness in determining the physical parameters of Compton scattering in detection,e.g., lack of the directional information of the recoil electrons. The recent major mission/instrument in the MeV
band, Compton Gamma Ray Observatory/COMPTEL, which was Compton Camera (CC), detected a mere ~30
persistent sources. It is in stark contrast with the ~2000 sources in the GeV band. Here we report the performance ofan Electron-Tracking Compton Camera (ETCC), and prove that it has a good potential to break through thisstagnation in MeV gamma-ray astronomy. The ETCC provides all the parameters of Compton-scattering bymeasuring 3D recoil electron tracks; then the Scatter Plane Deviation (SPD) lost in CCs is recovered. The energy
loss rate (dE/dx), which CCs cannot measure, is also obtained, and is found to be helpful to reduce the backgroundunder conditions similar to those in space. Accordingly, the significance in gamma detection is improved
severalfold. On the other hand, SPD is essential to determine the point-spread function (PSF) quantitatively. The
SPD resolution is improved close to the theoretical limit for multiple scattering of recoil electrons. With such a welldetermined PSF, we demonstrate for the first time that it is possible to provide reliable sensitivity in Compton
imaging without utilizing an optimization algorithm. As such, this study highlights the fundamental weak-points ofCCs. In contrast we demonstrate the possibility of ETCC reaching the sensitivity below 1 × 10−12 erg cm−2 s−1 at 1
MeV.

E-mail Address:
tanimori@cr.scphys.kyoto-u.ac.jp

Site Address:
http://iopscience.iop.org/article/10.1088/0004-637X/810/1/28/meta

80

JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 53, 1067, Published: JUL2016

A prototype of aerial radiation monitoring system using an unmanned helicopter mountinga GAGG scintillator Compton camera
Jianyong Jianga, Kenji Shimazoea, Yasuaki Nakamurab, Hiroyuki Takahashia,b, Yoshiaki Shikazec,Yukiyasu
Nishizawac, Mami Yoshidac, Yukihisa Sanadac, Tatsuo Toriic, Masao Yoshinod, Shigeki Itod,Takanori Endod, Kosuke
Tsutsumid, Sho Katod, Hiroki Satod, Yoshiyuki Usukid, Shunsuke Kurosawae,f,Kei Kamadaeand Akira Yoshikawae,fa Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo, Bunkyoku, Tokyo 113-8656, Japan;
bDepartment of Bioengineering, School of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 1138656,Japan;c Sector of Fukushima Research and Development, Japan Atomic Energy Agency, 2-2-2, Uchisaiwai-cho,
Chiyoda-ku, Tokyo 100-8577, Japan;d Furukawa Co., Ltd., 1-25-13, Kannondai, Tsukuba, Ibaraki 305-0856, Japan;
e New Industry Creation Hatchery Center(NICHe), Tohoku University, 6-6-10, Aoba, Aramaki, Aoba-ku, Sendai,
Miyagi 980-8579, JAPAN;
f Institute for Materials Research(IMR), Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, JAPAN

Abstract:
Due to the accident of Fukushima Daiichi Nuclear Power Plant, some areas were contaminated by released
radioisotopes (mainly 137Cs and 134Cs). Effective decontamination is demanded to encourage evacuated people toreturn. This paper proposes a new survey system using an unmanned helicopter equipped with a Compton camera
for localizing radionuclides. As a prototype, 32 Ce:Gd 3(Al,Ga)5O12 (GAGG) crystals were coupled to 16 silicon
photomultipliers and 16 avalanched photodiodes as the scatterer and absorber, respectively. A new Dynamic Timeover-Threshold (dToT) method was applied to convert CR-RC shaping signals to digital signals for multi-channel
spectra and coincidence acquisition. The system was designed to work in two modes: one is Compton-camera mode
(CCM) which obtains the radiation distribution maps through Compton imaging using hovering flights, while theother one is Gamma-camera mode (GCM) which maps the radiation distribution via measured coincidence eventsusing programmed flights. For point source in CCM, an intrinsic efficiency of 1.68% with a combined standard
uncertainty of 0.04% and an angular resolution of about 14° (FWHM, full width at half maximum) was achieved. In
GCM, a spatial resolution of about 11 cm (FWHM) was obtained when detecting area is 11.2 cm away from thedetector, while it was about 28 cm (FWHM) in single detector mode (SDM). Promising results were obtained infield in Fukushima.

E-mail Address:
Jjy12.utokyo.edu@gmail.com

Site Address:
http://www.tandfonline.com/doi/full/10.1080/00223131.2015.1089796?scroll=top&needAccess=true81

NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH SECTION A 800, 40, Published: NOV2015

New readout and data-acquisition system in an electron-tracking Compton camera for
MeV gamma-ray astronomy (SMILE-II)
T. Mizumotoa, Y. Matsuokaa, Y. Mizumurab, a, T. Tanimoria, b, H. Kuboa, A. Takadaa, S. Iwakia, T. Sawanoa, K.
Nakamuraa, S. Komuraa, S. Nakamuraa, T. Kishimotoa, M. Odaa, S. Miyamotoa, T. Takemuraa, J.D. Parkera, D.
Tomonoa, S. Sonodaa, K. Miuchic, S. Kurosawada Department of Physics, Kyoto University, 606-8502 Kyoto, Japanb Unit of Synergetic Studies for Space, Kyoto University, 606-8502 Kyoto, Japanc Department of Physics, Kobe University, 658-8501 Kobe, Japand Institute for Materials Research, Tohoku University, 980-8577 Sendai, Japan

Abstract:
For MeV gamma-ray astronomy, we have developed an electron-tracking Compton camera(ETCC) as a MeV gamma-ray telescope capable of rejecting the radiation background andattaining the high sensitivity of near 1 mCrab in space. Our ETCC comprises a gaseous timeprojection chamber (TPC) with a micro pattern gas detector for tracking recoil electrons and aposition-sensitive scintillation camera for detecting scattered gamma rays. After the success of afirst balloon experiment in 2006 with a small ETCC (using a 10×10×15 cm3 TPC) for measuring
diffuse cosmic and atmospheric sub-MeV gamma rays (Sub-MeV gamma-ray Imaging Loadedon-balloon Experiment I; SMILE-I), a (30 cm)3 medium-sized ETCC was developed to measure
MeV gamma-ray spectra from celestial sources, such as the Crab Nebula, with single-day
balloon flights (SMILE-II). To achieve this goal, a 100-times-larger detection area comparedwith that of SMILE-I is required without changing the weight or power consumption of thedetector system. In addition, the event rate is also expected to dramatically increase duringobservation. Here, we describe both the concept and the performance of the new dataacquisition system with this (30 cm)3 ETCC to manage 100 times more data while satisfying thesevere restrictions regarding the weight and power consumption imposed by a balloon-borne
observation. In particular, to improve the detection efficiency of the fine tracks in the TPC from
~10% to ~100%, we introduce a new data-handling algorithm in the TPC. Therefore, for efficientmanagement of such large amounts of data, we developed a data-acquisition system withparallel data flow.
E-mail Address:
mizumoto@cr.scphys.kyoto-u.ac.jp

Site Address:
http://www.sciencedirect.com/science/article/pii/S0168900215009328

82

MATERIALS 8, 5597, Published: AUG2015

Crystal Growth of Ca3Nb(Ga1−xAlx)3Si2O14 Piezoelectric Single Crystals with Various Al
Concentrations
YuuiYokota1,TetsuoKudo2,YujiOhashi2,AndreyMedvedev2,ShunsukeKurosawa1,2,KeiKamada1,3 and AkiraYoshikawa
1,2,3

1 New Industry Creation Hatchery Center (NICHe), Tohoku University, 6-6-10, Aoba, Aramaki, Aoba-ku, Miyagi,
Sendai 980-8579, Japan
2 Institute for Materials Research, Tohoku University, 2-1-1, Katahira, Aoba-ku, Miyagi, Sendai 980-8577, Japan;
3 C&A Corporation 6-6-40, Aoba, Aramaki, Aoba-ku, Miyagi, Sendai 980-8579, Japan

Abstract:
Ca3Nb(Ga1-xAlx)3Si2O14 (CNGAS) single crystals with various Al concentrations were grownby a micro-pulling-down (μ-PD) method and their crystal structures, chemical compositions,crystallinities were investigated. CNGAS crystals with x = 0.2, 0.4 and 0.6 indicated a single
phase of langasite-type structure without any secondary phases. In contrast, the crystals with x= 0.8 and 1 included some secondary phases in addition to the langasite-type phase. Lattice
parameters, a- and c-axes lengths, of the langasite-type phase systematically decreased with anincrease of Al concentration. The results of chemical composition analysis revealed that theactual Al concentrations in as-grown crystals were almost consistent with the nominal
compositions. In addition, there was no large segregation of each cation along the growth
direction.
E-mail Address:
yokota@imr.tohoku.ac.jp

Site Address:
https://www.researchgate.net/publication/281616343_Crystal_Growth_of_Ca3NbGa1xAlx3Si2O14_Piezoelectric_Single_Crystals_with_Various_Al_Concentrations

83

OPTICAL MATERIALS 50, 71, Published:DEC2015

Directionally solidified Eu doped CaF2/Li3AlF6 eutectic scintillator for neutron detection
Kei Kamadaa, b, Kousuke Hishinumae, Shunsuke Kurosawab, c, Yasuhiro Shojia, c, Jan Pejchalb, d, Yuji Ohashic, Yuui
Yokotaa, Akira Yoshikawaa, b, c
a Tohoku University, New Industry Creation Hatchery Center, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579,
Japan
b C&A Corporation, T-Biz, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japanc Tohoku University, Institute for Material Research, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japand Institute of Physics AS CR, Cukrovarnicka 10, 16253 Prague, Czech Republic
e Institute for Materials Research, Tohoku University, Japan

Abstract:
Eu doped CaF2/Li3AlF6 eutectics were grown by μ-PD method. The directionally solidified
eutectic with well-aligned 600 nm diameter Eu:CaF2 scintillator fibers surrounded with Li3AlF6
was prepared. The grown eutectics showed an emission peak at 422 nm ascribed to Eu2+ 4f–5dtransition from Eu:CaF2 scintillation fiber. Li concentration in the Eu:CaF2–Li3AlF6 eutectic isaround 0.038 mol/cm3,which is two times higher than that of LiCaAlF6 single crystal(0.016 mol/cm3). The light yield of Eu:CaF2–Li3AlF6 eutectic was around 7000 ph/neutron. The
decay time was about 550 ns (89%) and 1450 ns (11%).
E-mail Address:
kamada@imr.tohoku.ac.jp

Site Address:
http://www.sciencedirect.com/science/article/pii/S0925346715003626

84

JAPANESE JOURNAL OF APPLIED PHYSICS 54, 10ND13-1 , Published:DEC2016

Growth and piezoelectric properties of Ca3Nb(Ga1-xAlx)3Si2O14 (x = 0.25 and 0.50) single
crystalsYuui Yokota1, Yuji Ohashi2, Tetsuo Kudo2, Vladimir V. Kochurikhin3, Shunsuke Kurosawa1,2,Kei Kamada1,4, andAkira Yoshikawa1,2,4
1 New Industry Creation Hatchery Center (NICHe), Tohoku University, Sendai 980-8579, Japan
2 Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
3 General Physics Institute, Moscow 119991, Russia
4 C&A Corporation, Sendai 980-8579, Japan

Abstract:
One inch Ca3NbGa3Si2O14 (CNGS) and Ca3Nb(Ga1-xAlx)3Si2O14 (CNGAS) bulk crystals withan ordered langasite-type structure were grown by a Czochralski method. CNGS bulk single
crystals without cracks could be grown, while CNGAS bulk crystals with x = 0.25 and 0.50
included some cracks even under improved growth conditions. Lattice parameters andanisotropy on the structure of grown crystals were systematically decreased and increased byincreasing the Al concentration, respectively. Although the density and dielectric constant ε11 ofan X-cut sample of the CNGAS crystal with x = 0.25 were decreased by Al substitution, theelectromechanical coupling factor k12 and piezoelectric constant d11 were increased. The effectsof Al substitution on piezoelectric properties were almost consistent with previous reports on thedisordered langasite-type crystals except for their amount of change.
E-mail Address:
yokota@imr.tohoku.ac.jp

Site Address:
https://www.researchgate.net/publication/282313841_Growth_and_piezoelectric_properties_of_Ca_3_NbGa_1_x_Al_x_3_Si_2_O_14_x_025_and_050_single_crystals

85

NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH SECTION A 806, 395, Published: JAN2016

Nuclear Instruments and Methods in Physics Research Section A: Accelerators,
Spectrometers, Detectors and Associated Equipment
T. Saitoa, T. Iwasakia, S. Kurosawab, c, A. Yoshikawab, c, T. Denaa Frontier Research Center, Canon Inc., 3-30-2, Shimomaruko, Ohta-ku, Tokyo 146-8501, Japanb Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japanc New Industry Creation Hatchery Center (NICHe), Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi
980-8579, Japan

Abstract:
BiI3 single crystals were grown by the physical vapor transport method. The repeatedsublimation of the starting material reduced impurities in the BiI3 single crystal to sub-ppm
levels. The detector was fabricated by depositing Au electrodes on both surfaces of the 100-μmthick BiI3 single crystal platelet. The resistivity of the BiI3 single crystal was increased by postannealing in an iodine atmosphere (ρ=1.6×1011 Ω cm). Pulse height spectroscopy measurements
showed clear peaks in the energy spectrum of alpha particles or gamma rays. It was estimatedthat the mobility-lifetime product was μeτe=3.4–8.5×10−6 cm2/V and the electron–hole paircreation energy was 5.8 eV. Our results show that BiI3 single crystals are promising candidates
for detectors used in radiographic imaging or gamma ray spectroscopy.
E-mail Address:
saito.tatsuya125@canon.co.jp

Site Address:
http://www.sciencedirect.com/science/article/pii/S0168900215012437

86

ADVANCED OPTICAL MATERIALS 3, 463, Published:APR2015

Recent R&D Trends in Inorganic Single-Crystal Scintillator Materials for Radiation
Detection
Martin Nikla, Akira Yoshikawaba Institute of Physics, AS CR, Prague, Czech Republicb Institute for Materials Research, Tohoku University, Aoba-ku, Sendai, Japan

Abstract:
In this review, the major achievements and research and development (R&D) trends from thelast decade in the field of single crystal scintillator materials are described. Two materialfamilies are included, namely, those of halide and oxide compounds. In most cases, the host
crystals are doped with Ce3+, Pr3+ or Eu2+ rare earth ions. Their spin- and parity-allowed 5d–4ftransitions enable a rapid scintillation response, on the order of tens to hundreds ofnanoseconds. Technological recipes, extended characterization by means of optical and magnetic
spectroscopies, and theoretical studies are described. The latter provide further support toexperimental results and provide a better understanding of the host electronic band structure,energy levels of specific defects, and the emission centers themselves. Applications in medical
imaging and dosimetry, security measures, high-energy physics and the high-tech industry, inwhich X(γ)-rays or particle beams are used and monitored, are recognized as the main driving
factor for R&D activities in this field.
E-mail Address:
nikl@fzu.cz

Site Address:
http://onlinelibrary.wiley.com/doi/10.1002/adom.201400571/abstract87IEEE TRANSACTION ON NUCLEAR SCIENCE 63,497 Published: APR2016

Growth of 1.5-In Eu : Single Crystal and Scintillation Properties
Yuui Yokota1, Tomoki Ito2, Shoji Yasuhiro3, Shunsuke Kurosawa1,Yuji Ohashi2, Kei Kamada1,3, and Akira
Yoshikawa1,2,3
1 New Industry Creation Hatchery Center (NICHe), Tohoku University, Sendai 980-8579, Japan
2 Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
3 C&A Corporation, Sendai 980-8579, Japan

Abstract:
We grew 1.5-in Eu doped SrI2 (Eu:SrI2) bulk single crystal by a modified vertical Bridgman(VB) method using a removable chamber and high-frequency induction heating. As-grown 1.5-in
Eu:SrI2 bulk single crystal had no visible crack and inclusion in the crystal. In thetransmittance and α-ray radioluminescence spectra, large absorption below 433 nm andemission peak at 433 nm were observed, respectively. Each polished Eu:SrI2 specimen indicated
56 000 ∼ 62 000 ph/MeV light yield and 3.3 ∼ 3.9% energy resolution. The decay times of thespecimens were 0.61 ∼ 0.67 μs.
E-mail Address:
yokota@imr.tohoku.ac.jp

Site Address:
https://www.researchgate.net/publication/301666765_Growth_of_15In_Eu_Single_Crystal_and_Scintillation_Properties

88

ELECTRONICS LETTERS 51, 1957, Published: NOV2015

Acoustical physical constants around room temperature for Ca3TaGa1.5Al1.5Si2O14 single
crystalY. Ohashi1. S. Kurosawa2K. Kamada2,3Y. Yokota2Y. Shoji3T. Kudo1A. Yoshikawa1,2,3
1 New Industry Creation Hatchery Center (NICHe), Tohoku University, Sendai 980-8579, Japan
2 Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
3 C&A Corporation, Sendai 980-8579, Japan

Abstract:
A full set of acoustical physical constants was determined for Ca3TaGa1.5Al1.5Si2O14(CTGAS) single crystal fromulk wave velocities measured by the ultrasonic micro-spectroscopy method. Several plate specimens were cut
perpendicular to theX-Y-,Z-,35.25°Y-, and 139.74°Y-directions from a CTGAS single crystal ingot grown by
Czochralski technique. Following measurements of dielectric constants and density, elastic constants, piezoelectric
constants, and their temperature coefficients were determined from longitudinal wave and shear wave velocities
measured for the CTGAS specimens at around room temperature. It was demonstrated that the as found constants
could provide calculation accuracy within ±0.15% in leaky surface acoustic wave velocity. The determined constants were used for numerical calculation of the cut angle, at which the temperature coefficient of shear wave
velocity becomes zero. This angle corresponded to 147.9°Y-cut substrate that had electromechanical coupling factor
fk2= 3.2%. This parameter is about four times greater than that of AT-cutαquartz

E-mail Address:
ohashi@imr.tohoku.ac.jp

Site Address:
http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=7335718

89

JOURNAL OF LUMINESCENCE 169, 701, Published: JAN2016

Energy resolution studies of Ce- and Pr-doped aluminum and multicomponent garnets:
The escape and photo-peaks
J.A. Maresa, A. Beitlerovaa, P. Prusaa, b, K. Blazekc, P. Horodyskyc, K. Kamadad, A. Yoshikawad, e, C. D’Ambrosiof,
M. Niklaa Institute of Physics A S CR, Cukrovarnicka 10, 162 53 Prague 6, Czech Republicb Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Brehova 7, 115 19 Prague 1,
Czech Republicc Crytur Ltd., Palackeho 175, 511 01 Turnov, Czech Republicd New Industry Creation Hatchery Center, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, 980-8579 Sendai, Japane Institute for Material Research (IMR), Tohoku University, Sendai 980-8577, Japanf CERN, PH-LHB Group, Geneva 23 CH1211, Switzerland

Abstract:
The photopeak and escape peak processes were studied in heavy Ce3+-doped LuAG and GGAG,
Pr3+-doped LuAG and undoped BGO scintillating crystals. Energy resolution measurements
were performed with 511 keV photons of 22Na radioisotope. In the pulse-height spectra theescape peaks were resolved clearly on thin samples (up to 3 mm). If sample thickness increases
the escape peak cannot be resolved anymore (for thicknesses approx. above 5 mm, especially).
Consequently, energy resolution increases by about 40% compared with that measured at 1 mm
thick samples.
E-mail Address:
amares@fzu.cz

Site Address:
http://www.sciencedirect.com/science/article/pii/S0022231315000952

90

JOURNAL OFLUMINESCENCE 169, 539, Published: JAN2016

The role of cerium variable charge state in the luminescence and scintillation mechanism incomplex oxide scintillators: The effect of air annealing
M. Nikla, V. Babina, J.A. Maresa, K. Kamadab, S. Kurosawac, A. Yoshikawab, c, J. Tousd, J. Houzvickad, K. Blazekd
a Institute of Physics AS CR, Cukrovarnická 10, 16253 Prague, Czech Republic
b NICHe, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japanc Institute for Materials Research (IMR), Tohoku University, Sendai 980-8577, Japan
d CRYTUR spol. s r.o., Palackeho 175, 511 01 Turnov, Czech Republic

Abstract:
The influence of annealing in air at elevated temperatures on the absorption, luminescence and scintillation
characteristics was studied for a set of Ce-doped aluminum garnet and perovskite single crystals. Positive effects
consisting mainly in increase of light yield and decrease of afterglow were found to varying extent in all thematerials. It is explained by the positive role of created stable Ce4+ center in scintillation mechanism and by decreaseof deep trap concentration based on oxygen vacancies.

E-mail Address:
nikl@fzu.cz

Site Address:
http://www.sciencedirect.com/science/article/pii/S0022231315000113

91

JOURNAL OF LUMINESCENCE 166, 117, Published: OCT2015

Energy migration processes in undoped and Ce-doped multicomponent garnet single
crystal scintillators
K. Bartosiewicza, b, V. Babina, K. Kamadac, A. Yoshikawac, d, M. Nikla
a Institute of Physics AS CR, Cukrovarnicka 10, Prague 16253, Czech Republicb Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Brehova 7, Praha
1 11519, Czech Republic
c NICHe, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japand Institute for Materials Research (IMR), Tohoku University, Sendai 980-8577, Japan

Abstract:

Multicomponent garnets (Y3−xGdxAl5−yGayO12) doped with Ce3+ ions are promising scintillators with a high density,
fast response time and high light yield. To deepen the knowledge about the transfer stage of scintillation mechanism
we discuss the energy migration and energy transfer processes in the set of undoped and Ce3+ activatedmulticomponent garnet single crystals. Temperature dependence of Gd 3+ emission intensities as well as decay
kinetics in Y3−xGdxAl5−yGayO12 (x,y=1,2,3) crystals point to the Gd3+→Gd3+ nonradiative energy migration, which isdiffusion limited. Concentration quenching of Gd3+ emission occurs by energy migration to accidental impurities
and/or structure defects. Temperature dependence of photoluminescence emission intensities and decay timemeasurements of Gd3+ as well as Ce3+ ions in Gd3Ga3Al2O12:Ce3+ single crystal reveal nonradiative energy transfer
Gd3+→Ce3+ (including migration through Gd3+ sublattice) which is responsible for slow Ce3+ fluorescence decay
component.

E-mail Address:
bartosiewicz@fzu.cz

Site Address:
http://www.sciencedirect.com/science/article/pii/S0022231315002628

92

JOURNAL OF LUMINESCENCE 169, 43, Published: JAN2016

Optical and scintillation properties of Ce3+-doped YGd2Al5−xGaxO12 (x=2,3,4) single crystal
scintillators
Warut Chewpraditkula, Petr Brůžab, Dalibor Pánekb, Nakarin Pattanaboonmeea, Kriangkrai Wantonga, Weerapong
Chewpraditkula, Vladimir Babinc, Karol Bartosiewiczc, Kei Kamadad, Akira Yoshikawad, Martin Niklc
a Department of Physics, King Mongkut's University of Technology Thonburi, Bangkok 10140, Thailand
b Faculty of Biomedical Engineering, Czech Technical University in Prague, Kladno, Czech Republicc Institute of Physics, AS CR, Cukrovarnicka 10, Prague 16253, Czech Republicd IMR, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan

Abstract:

The optical and scintillation properties of Ce3+-doped YGd2Al5−xGaxO12 (x=2,3,4) single crystals were investigated.
With increasing Ga content in the garnet host, the 5d1 absorption and emission bands shift toward higher energy due
to the decrease in the crystal field splitting of the 5d levels. Temperature dependences of absorption and emission
spectra and of photoluminescence decays of both prompt and delayed components were measured. Light yield (LY)and its dependence on an amplifier shaping time were measured under excitation with γ-rays. High LY value of
38,000 photons/MeV was obtained for a YGd2Al2Ga3O12:Ce sample. Scintillation decay was measured with anextended dynamical and temporal scale under the nanosecond-pulsed soft X-ray excitation. The relative content of
the fastest component in the scintillation response increases with increasing Ga content.

E-mail Address:
weerapong.che@kmutt.ac.th

Site Address:
http://www.sciencedirect.com/science/article/pii/S0022231315005013

93

JOURNAL OF CRYSTAL GROWTH 452, 95, Published: OCT2016

Luminescent properties of Cr-doped gallium garnet crystals grown by the micro-pullingdown method
Shunsuke Kurosawaa, b, Akira Suzukib, Akihiro Yamajib, Kei Kamadaa, c, Jan Pejchald, Yuji Ohashib, Yuui Yokotaa,
Valery Ivanovich Chanib, Akira Yoshikawaa, b, c
a New Industry Creation Hatchery Center (NICHe), Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai,
Miyagi 980-8579, Japanb Institute for Materials Research (IMR), Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577,
Japan
c C&A Corporation, 6-6-40 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8577, Japand Institute of Physics, ASCR, Cukrovarnická 10, 162-53 Prague, Czech Republic

Abstract:
Cr-doped (GdxY1−x)3Ga5O12 crystals (x=0.00, 0.25, 0.50, 0.75 and 1.00) were grown by the micro-pulling-down
method and examined for their possible application as red and infrared scintillating detectors in medical field.
Although Cr:(Gd0.75Y0.25)3Ga5O12 and Cr:Gd3Ga5O12 had similar X-ray diffraction patterns, other samples showedsome change in lattice constant. All the crystals had broad emission bands in the red and infrared region when
excited by either 450 nm photons or X rays. These bands were associated with 4T2→A2 transitions. Moreover,redshift of the emission-peak wavelengths (4T2→4A2) and absorption peaks (4A2→4T1 and 4T2) was observed withincrease of Gd content (x) in Cr-doped (GdxY1−x)3Ga5O12 due to the change of the crystal fields. The crystals had
scintillation emissions in the wavelength region suitable for the real time dose monitoring in radiation therapy.

E-mail Address:
kurosawa@imr.tohoku.ac.jp

Site Address:
http://www.sciencedirect.com/science/article/pii/S0022024816300239

94

OPTICAL MATERIALS 41, 80, Published: MAR2015

Luminescence study on Eu or Tb doped lanthanum–gadolinium pyrosilicate crystal
Shunsuke Kurosawaa, b, Toetsu Shishidoa, Takamasa Sugawaraa, Akiko Nomuraa, Kunio Yubutaa, Jan Pejchalb, c,
Rikito Murakamia, Yuui Yokotab, Yasuhiro Shojia, d, Yuji Ohashia, Kei Kamadab, d, Akira Yoshikawaa, b, d
a Institute for Materials Research, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japanb NICHe, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japanc Institute of Physics AS CR, Cukrovarnicka 10, Prague 6, 16200, Czech Republic
d C&A Corporation, 6-6-40 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan

Abstract:(Eu0.01, Gd0.90, La0.09)2Si2O7 (Eu:La–GPS) and (Tb0.01, Gd0.90, La0.09)2Si2O7 (Tb:La–GPS) crystals
were grown by the floating zone method, and their optical and scintillation properties were
investigated. Gd3+-to-Tb3+ or –Eu3+ energy transfer processes were found, and photoluminescence and radio-luminescence emission spectra showed 5D0–7Fi (i = 1–4) Eu3+ transitions
in Eu:La–GPS, and 5D3–7Fi (i = 3–6) and 5D4–7Fi (i = 3–6) transitions in Tb:La–GPS. Using
these scintillators, alpha-ray imaging was possible with a CMOS camera. These materials canbe used for X-ray detection as well.
E-mail Address:
kurosawa@imr.tohoku.ac.jp

Site Address:
http://www.sciencedirect.com/science/article/pii/S0925346714006089

95

OPTICAL MATERIALS 47, 462, Published: SEP2015

Significant blue-shift in photoluminescence excitation spectra of Nd3+:LaF3 potential laser
medium at low-temperature
Ren Aritaa, Yuki Minamia, Marilou Cadatal-Radubana, b, c, Minh Hong Phama, c, d, Melvin John Fernandez Empizoa,
Mui Viet Luonga, Tatsuhiro Horia, Masahiro Takabatakea, Kazuhito Fukudaa, Kazuyuki Moria, Kohei Yamanoia,
Toshihiko Shimizua, Nobuhiko Sarukuraa, Kentaro Fukudae, Noriaki Kawaguchie, Yuui Yokotaf, Akira Yoshikawaea Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japanb Centre for Theoretical Chemistry and Physics, Institute of Natural and Mathematical Sciences, Massey
University, Albany, Auckland 0632, New Zealandc Institute for Academic Initiatives, Osaka University, 1-1 Yamadaoka, Suita, Osaka 565-0871, Japand Institute of Physics, Viet Nam Academy of Science and Technology, 10 Dao Tan, Ba Dinh, Hanoi, Viet Name Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japanf New Industry Creation Hatchery Center, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi
980-8579, Japan

Abstract:
Temperature-dependent optical properties of bulk Nd3+:LaF3 crystals are reported. A blue-shift
in the photoluminescence excitation (PLE) spectrum is observed at 30 K. The 173.2-nm emission
peak wavelength at 300 K shifted to 172.8 nm at 30 K, consistent with the 6-nm blue-shift intransmission edge and 2437-cm−1 increase in the lowest energy level of the 4f25d configuration.
Thermal broadening of the 5d–4f emission bands with increasing temperature is also observed
as the dip at around 178.5 nm present at 30 K disappears at 300 K. A smaller spectral overlap
between the PLE and emission spectra is observed as temperature is decreased. Our results
suggest that absorption cross-section at the peak fluorescence wavelength is expected todecrease at 30 K.
E-mail Address:
arita-r@ile.osaka-u.ac.jp

Site Address:
http://www.sciencedirect.com/science/article/pii/S0925346715003808

96

OPTICAL MATERIALS 50, 76, Published: DEC2015

Growth and scintillation properties of Eu doped BaCl2/LiF eutectic scintillator
Kei Kamadaa, b Kosuke Hishinumac, Shunsuke Kurosawab, c, Akihiro Yamajic, Yasuhiro Shojia, c, Jan Pejchalb, d, Yuui
Yokotaa, Yuji Ohashic, Akira Yoshikawaa, b, c
a Tohoku University, New Industry Creation Hatchery Center, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi
980-8579, Japanb C&A Corporation, T-Biz, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japanc Tohoku University, Institute for Material Reseach, 2-1-1 Katahira Aoba-ku, Sendai, Miyagi 980-8577, Japand Institute of Physics AS CR, Cukrovarnicka 10, 16253 Prague, Czech Republic

Abstract:
Eu doped BaCl2/LiF eutectics were grown by the micro-pulling down method and theirdirectionally solidified eutectic (DSE) system has been investigated. The grown eutectic showed
main phases of cubic LiF and orthorhombic BaCl2. In these eutectics, the 399 nm emission of
Eu2+ 4f5d was obtained. It shows the intrinsic decay time of about 410 ns. The light yield of the
1-mm-thick eutectic showed 7000 ph/5.5 MeV alpha-ray.
E-mail Address:
kamada@imr.tohoku.ac.jp

Site Address:
http://www.sciencedirect.com/science/article/pii/S0925346715300513

97

JOURNAL OF LUMINESCENCE 169, 682, Published: JAN2016

Luminescence mechanism in doubly Gd, Nd-codoped fluoride crystals for VUV scintillators
Jan Pejchala, b, Kentaro Fukudac, Vladimir Babinb, Shunsuke Kurosawaa, d, Yuui Yokotaa, Akira Yoshikawaa, d, Martin
Niklb
a NICHe, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, 9808579 Japanb Institute of Physics AS CR, Cukrovarnicka 10, Prague 6,16200, Czech Republicc Tokuyama Corporation, Kasumigaseki Common Gate West Tower 2-1, Kasumigaseki 3-chome, Chiyoda-ku,
Tokyo, 1008983, Japand Institute for Materials Research, 2-1-1 Katahira, Aoba-ku, Sendai, 9808577 Japan

Abstract:
The Nd-doped, Gd-doped and doubly Nd, Gd-codoped BaLu1.2Y0.8F8 (BaLuYF) and LuF3 single crystals weregrown by a micro-pulling-down method. Their photoluminescence, radioluminescence and alpha-ray-excited pulseheight spectra were studied in the vacuum-ultra-violet (VUV) region to confirm their possible application as fast
VUV scintillators. Complementary photoluminescence measurements in the ultra-violet/visible spectral region were
performed as well. The possibility of scintillation performance improvement by Gd codoping was tested. The overall
scintillation efficiency of BaLuYF:Nd1% was comparable to that of the LaF3:Nd8% reference sample and only
slight improvement was observed after Gd1% codoping. The positive effect of Gd codoping was confirmed forhigher dopant concentrations. This was explained by an energy transfer from the high-energy Gd3+ 4f 2G(0)7/2 levelto the Nd3+ 5d state. On the other hand, pulse-height spectra showed degradation of the light yield under alpha-ray
excitation, which was explained by introduction of slow components due to Gd codoping. On the other hand, no
positive effect of Gd codoping was found for the overall scintillation efficiency of Nd-doped LuF3, despite the sameenergy transfer process was confirmed. Slight improvement of the light yield under alpha-ray excitation was
confirmed.

E-mail Address:
pejchal@fzu.cz

Site Address:
http://www.sciencedirect.com/science/article/pii/S0022231315001921

98

RADIATION MEASUREMENTS 87, 24, Published: APR2016

Timing characteristics of the scintillation
Gd3Al2.6Ga2.4O12:Ce single crystal scintillators

responseof

Gd3Al2Ga3O12:CeandOngsa Sakthonga, Weerapong Chewpraditkula, Kei Kamadab, c, Akira Yoshikawab, c, Tomasz Szczesniakd, Martyna
Grodzickad, Pawel Sibczynskid, Marek Moszynskid
a King Mongkut's University of Technology Thonburi, Bangkok, 10140, Thailandb IMR, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japanc NICHe, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Miyagi, 980-8579, Japand National Centre for Nuclear Research, A. Soltana 7, Otwock-Swierk, PL 05-400, Poland

Abstract:
The timing characteristics of scintillation response of Czochralski-grown Gd3Al2Ga3O12:Ce and Gd3Al2.6Ga2.4O12:Ce
single crystals were compared. The photoelectron yield, scintillation decay times, and coincidence time resolution
were measured. At 662 keV γ-rays, the photoelectron yield of 6200 phe MeV −1 obtained for Gd3Al2Ga3O12:Ce ishigher than that of 4970 phe MeV−1 obtained for Gd3Al2.6Ga2.4O12:Ce, while an inferior energy resolution of theformer (7.2% vs. 5.6%) is observed. Scintillation decays are approximated by sum of exponentials with thedominant fast component decay time and its relative intensity of 89 ns (73%) for Gd3Al2Ga3O12:Ce and 136 ns(69%) for Gd3Al2.6Ga2.4O12:Ce. The coincidence time resolution obtained for Gd3Al2Ga3O12:Ce is superior than thatof Gd3Al2.6Ga2.4O12:Ce. The normalized time resolution was also discussed in terms of a number of photoelectronsand decay characteristics of the light pulse.

E-mail Address:
weerapong.che@kmutt.ac.th

Site Address:
http://www.sciencedirect.com/science/article/pii/S1350448716300531

99

RADIATION MEASUREMENTS 90, 162, Published: JUL2016

Scintillation properties of Zr co-doped Ce:(Gd, La)2Si2O7 grown by the Czochralski process
Rikito Murakamia, Shunsuke Kurosawaa, b, Yasuhiro Shojia, d, Vitezslav Jaryc, Yuji Ohashia, Jan Pejchalb, c, Yuui
Yokotab, Kei Kamadab, Martin Niklc, Akira Yoshikawaa, b, d
a Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi, Japanb New Industry Creation Hatchery Center, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi,Japan
c Institute of Physics CAS, Prague, 10 Cukrovarnicka, Prague 6, 16200, Czech Republic
d C&A Corp., 6-6-40 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, Japan

Abstract:(Gd0.75,Ce0.015,La0.235)2Si2O7 (Ce:La-GPS) single crystals co-doped with 0, 100, 200, 500 and 1000 ppm Zr weregrown by the Czochralski process, and their scintillation properties were investigated. We investigated the co-doping
effect of a stable tetravalent ion in Ce:La-GPS for the first time. The scintillation decay times in the fastercomponent were shortened with increasing the Zr concentration. While the non-co-doped sample showed ∼63 ns day
time, the Zr 100, 200, 500 and 1000 ppm co-doped samples showed ∼61, ∼59, ∼57, ∼54 ns, respectively.
Additionally, light output, photon nonproportional response (PNR) and other optical properties were investigated.

E-mail Address:
r_murakami@imr.tohoku.ac.jp

Site Address:
http://www.sciencedirect.com/science/article/pii/S1350448716300543

100

JOURNAL OF CRYSTAL GROWTH 457, 143, Published: JAN2017

Improvement of the growth of Li4SiO4 single crystals for neutron detection and theirscintillation and luminescence properties
Jan Pejchala, Vladimir Babina, Alena Beitlerovaa, Shunsuke Kurosawab, c, Yuui Yokotab, c, Akira Yoshikawab, c,
Martin Nikla
a Institute of Physics CAS, Cukrovarnicka 10, Prague 6, 16200, Czech Republicb Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 9808577, Japanc New Industry Creation Hatchery Center, 6-6-10 Aoba, Aramaki, Sendai 9808579, Japan

Abstract:
We have investigated Li4SiO4 scintillation crystals for their possible application in neutron detection due to high Li
content and low density of 2.35 g/cm3. The micro-pulling-down method employing the Ir crucible and afterheater
was optimized for crystal growth of Li4SiO4 taking into account the Li evaporation. To grow high-quality crack-freesingle crystals, the heating power was increased to establish milder temperature gradient, thicker meniscus, smaller
crystal diameter and resulting smaller stress in the as-grown crystals. The undoped, Ti-, Cr-, and Al- doped crystals
were prepared and studied. Radioluminescence measurements under X-ray excitation showed quite high overall
scintillation efficiency of the Ti-doped sample reaching as high as 250% of that of Bi4Ge3O12 reference scintillator.
The emission spectrum was dominated by one broad band peaking at 350 nm related to Ti4+ impurity. Reasonable
light yield of 10000 photons/neutron was found. However, its long decay time of 54 μs might be a limitation
especially for high counting rate applications. The overall scintillation efficiency of the Cr 3+ sample was much lower
and the spectrum shows one broad peak at 463 nm which does not correspond to Cr3+ luminescence. The
radioluminescence spectrum of the Al-doped sample resembled to that of the Ti-doped one, just its magnitude isconsiderably lower, which was explained by Ti contamination. Peculiarities and optimization of crystal growth and a
preliminary sketch of luminescence mechanisms and dopant incorporation are discussed.

E-mail Address:
pejchal@fzu.cz

Site Address:
http://www.sciencedirect.com/science/article/pii/S0022024816300331

101

RADIATION MEASUREMENTS 90, 287, Published: JUL2016

Luminescence properties of the Mg co–doped Ce:SrHfO3 ceramics prepared by the Spark
Plasma Sintering Method
Hiroyuki Chibaa, Shunsuke Kurosawaa, b, Koichi Harataa, Rikito Murakamia, Akihiro Yamajia, Yuji Ohashia, Jan
Pejchalc, Kei Kamadab, d, Yuui Yokotab, Akira Yoshikawaa, b, d
a Institute for Materials Research, Tohoku University, 2–1–1 Katahira, Aoba–ku, Sendai, Miyagi, 980–8577, Japanb New Industry Creation Hatchery Center (NICHe), 6–6–10 Aoba, Aramaki, Aoba–ku, Sendai, Miyagi, 980–8579, Japanc Institute of Physics ASCR, Cukrovarnicka 10, 16200 Prague, Czech Republic
d C&A Corporation, 6–6–40, Aza–Aoba, Aramaki, Aoba–ku, Sendai, 980–8579, Japan

Abstract:
1300 or 1400 °C pre–sintered Al/Ce/Mg:SrHfO3 and Al/Ce:SrHfO3 ceramics were prepared by the Spark Plasma
Sintering (SPS) in order to search for a new scintillation material with a high–effective atomic number(Zeff) andgood light output. The SrHfO3 has a high Zeff of 60, and high gamma–ray detection efficiency is expected.
Meanwhile it has a high melting point of over 2500 °C, and single crystal is hard to be grown. On the other hand,high melting materials can be prepared as ceramics, and the SPS method is a simple process to fabricate theceramics within a few hours. Thus, we prepared the samples using the SPS method, and their optical andscintillation properties were investigated. We found that Al/Ce/Mg:SrHfO 3 and Al/Ce:SrHfO3 ceramics had anemission wavelength at around 400 nm originating from 5d–4f transition of Ce3+. Moreover, Al/Ce/Mg:SrHfO3 presintered at a temperature of 1400 °C had a light output of approximately 5,000 ph/MeV. In this paper, the light
output of Mg-co-doped samples was improved compared with the Mg-free ones. The light output also depends on
the pre-sintering temperature.

E-mail Address:
chiba-hiro@imr.tohoku.ac.jp

Site Address:
http://www.sciencedirect.com/science/article/pii/S1350448716300609

102

RADIATION MEASUREMENTS 90, 170, Published: JUL2016

Growth and radioluminescence of metal elements doped LiCaAlF6 single crystals forneutron scintillator
Chieko Tanakaa, Yuui Yokotab, Shunsuke Kurosawab, Akihiro Yamajia, Vitezslav Jaryc, Vladimir Babinc, Jan
Pejchalc, Yuji Ohashia, Kei Kamadab, d, Martin Niklc, Akira Yoshikawaa, b, d
a Institute for Materials Research, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japanb New Industry Creation Hatchery Center (NICHe), Tohoku University, 6-6-10, Aramaki, Aoba, Aoba-ku, Sendai,
Miyagi, 980-8579, Japanc Institute of Physics AS CR, 10 Cukrovarnicka, Prague 6, 16200 Czech Republic
d C&A Corporation, 6-6-40, Aramaki, Aoba, Aoba-ku, Sendai, Miyagi, 980-8579, Japan

Abstract:

The ns2-type metal elements (Pb and Sn) doped LiCaAlF6 single crystals were grown by a micro-pulling-down (μPD) method. Pb doped LiCaAlF6 [Pb:LiCAF] crystals showed high transparency and single phase of the LiCAF
structure. However, we could not obtain Sn:LiCAF crystals due to the evaporation of SnF 2 during the crystal growth.
There was an absorption peak around 193 nm in the transmittance spectrum of Pb:LiCAF crystal. In theradioluminescence spectrum of the Pb:LiCAF crystal under X-ray irradiation, two emission peaks around 200 and
830 nm were observed.

E-mail Address:
chieko@imr.tohoku.ac.jp

Site Address:
http://www.sciencedirect.com/science/article/pii/S1350448716300567

103

RADIATION MEASUREMENTS, 90, 153, Published: JUL2016

Luminescence and scintillation response of YGd2Al2Ga3O12:Ce and LuGd2Al2Ga3O12:Ce
scintillators
Warut Chewpraditkula, Nakarin Pattanaboonmeea, Weerapong Chewpraditkula, Kei Kamadab, c, Akira Yoshikawab, c,
Martin Nikld
a Department of Physics, King Mongkut's University of Technology Thonburi, Bangkok 10140, Thailandb IMRAM, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japanc NICHe, Tohoku University 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japand Institute of Physics, AS CR, Cukrovarnicka 10, Prague 16253, Czech Republic

Abstract:
The luminescence and scintillation properties of YGd2Al2Ga3O12:Ce and LuGd2Al2Ga3O12:Ce single crystal
scintillators were compared. The light yield (LY) and energy resolution were measured using R6231 photomultiplier.
At 662 keV γ-rays, high LY value of 37,900 ph/MeV and energy resolution of 7.0% obtained for YGd 2Al2Ga3O12:Ce
are slightly better than the values of 35,400 ph/MeV and 7.6% obtained for LuGd2Al2Ga3O12:Ce. The ratio of LY
values under excitation with α- and γ-rays (α/γ ratio) was also determined. The LY dependence on amplifier shaping
time was measured in order to investigate the timing characteristics in the scintillation response. The estimatedphotofraction in pulse height spectrum of 662 keV γ-rays and the total mass attenuation coefficient at 662 keV γrays were also determined and compared with the theoretical ones calculated using the WinXCom program.

E-mail Address:
raychew.rc@gmail.com

Site Address:
http://www.sciencedirect.com/science/article/pii/S1350448715301153

104

JOURNAL OF CRYSTAL GROWTH 452, 135, Published: FEB2016

Czochralski Growth of 2 Inch Ca3Ta(Ga,Al)3Si2O14 Single Crystals for PiezoelectricApplications
Akira Yoshikawaa, b, c, Yasuhiro Shojia, c, Yuji Ohashia, Yuui Yokotab, Valery I. Chania, Masanori Kitaharaa, c, Tetsuo
Kudoa, Kei Kamadab, c, Shunsuke Kurosawaa, b, Andrey Medvedeva, Vladimir Kochurikhinc, da Institute for Materials Research (IMR), Tohoku University, Sendai 980-8577, Japanb New Industry Creation Hatchery Center (NICHe), Tohoku University, Sendai, Japanc C&A Corporation, 6-6-40 Aramaki Aza Aoba, Aoba-ku, Sendai 980-8577, Japand General Physics Institute, Vavilov Street 38, Moscow 119991, Russia

Abstract:
Growth of 2-in. diameter Al-substituted Ca3TaGa3Si2O14 crystals by Czochralski method is reported. The crystals
were grown from the melt of Ca3TaGa1.5Al1.5Si2O14 composition and had langasite structure. No inclusions ofsecondary phases were detected in these crystals. The Ca3Ta(Ga,Al)3Si2O14 mixed crystals produced using nonsubstituted Ca3TaGa3Si2O14 seeds were defective. They had cracks and/or poly-crystalline structure. However, thosegrown on the seed of approximately Ca3TaGa1.5Al1.5Si2O14 composition were defect-free. Phase diagram of the
Ca3TaGa3Si2O14–Ca3TaAl3Si2O14 pseudo-binary system and segregation phenomenon are discussed in some details.
Homogeneity of the crystals was evaluated by measuring 2D-mapping of leaky surface acoustic wave (LSAW)
velocities for Y-cut Ca3TaGa1.5Al1.5Si2O14 substrate. Although some inhomogeneities were observed due to slightvariations in chemical composition, the crystal had acceptable homogeneity for applications in acoustic wave
devices exhibiting the LSAW velocity variation within ±0.048%

E-mail Address:
yoshikawa@imr.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S0022024815007502

105

RADIATION MEASUREMENTS 90, 157, Published: JUL2016

Effects of Na and K co-doping on growth and scintillation properties of Eu:SrI2 crystals
Tomoki Itoa, Yuui Yokotab, Shunsuke Kurosawaa, b, Robert Kralc, Jan Pejchalb, c, Yuji Ohashia, Kei Kamadab, d, Martin
Niklc, Akira Yoshikawaa, b, d
a Institute for Materials Research, Tohoku University 2-1-1, Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japanb New Industry Creation Hatchery Center (NICHe), Tohoku University 6-6-10, Aramaki, Aoba, Aoba-ku, Sendai,
Miyagi, 980-8579, Japanc Institute of Physics AS CR 10 Cukrovarnicka, Prague 6, 16200 Czech Republic
d C&A Corporation 6-6-40, Aramaki, Aoba, Aoba-ku, Sendai, Miyagi, 980-8579, Japan

Abstract:
We grew Na and K co-doped Eu:SrI2 [Na,Eu:SrI2 and K,Eu:SrI2] crystals by a modified micro-pulling-down method
to reveal the co-doping effects on the crystal growth and scintillation properties. The non-codoped, Na0.5%,
Na1.0%, K0.5% and K1.0%,Eu:SrI2 crystals indicated high transparency while the milky parts were generated in theNa5.0% and K5.0%,Eu:SrI2 crystals. The light yields of Na,Eu:SrI2 and K,Eu:SrI2 crystals under γ-ray irradiation
were decreased by the Na and K co-doping. On the other hand, there was a small change within 940–1020 ns in the
decay times by the Na and K co-doping. In the light yield proportionality under γ-ray irradiation, the nonproportionality in the low energy region was improved by Na and K co-doping.

E-mail Address:
tomoki@imr.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S1350448716300257

106

RADIATION MEASUREMENTS 90, 334, Published: JUL2016

Optical and scintillation properties of Sr3BGa3Si2O14 (B = Nb, Ta) single crystals
Yuui Yokotaa, Tomoki Itob, Shunsuke Kurosawaa, Yuji Ohashib, Kei Kamadaa, Akira Yoshikawaa, b, c
a Institute for Materials Research, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japanb New Industry Creation Hatchery Center (NICHe), Tohoku University, 6-6-10, Aramaki, Aoba, Aoba-ku, Sendai,
Miyagi, 980-8579, Japanc C&A Corporation, 6-6-40, Aramaki, Aoba, Aoba-ku, Sendai, Miyagi, 980-8579, Japan

Abstract:
Optical and scintillation properties of Sr3NbGa3Si2O14 [SNGS] and Sr3TaGa3Si2O14 [STGS] single crystals with thelangasite-type crystal structure were investigated as a novel scintillator materials. In the transmittance spectra of the
SNGS and STGS polished specimens, absorption peaks around 380 and 505 nm were observed and the absorptions
are considered to be attributable to the excess oxygen in the crystals. An emission peak around 420 nm was observedin the X-ray radioluminescence spectrum of the SNGS crystal. On the other hand, there was an emission peakaround 335 nm in the X-ray radioluminescence spectrum of the STGS crystal.

E-mail Address:
yokota@imr.tohoku.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S1350448715301050

107

IEEE TRANSACTIONS ON NUCLEAR SCIENCES 63, 443, Published: APR2016

Large Size Czochralski Growth and Scintillation Properties of Mg2+ Co-doped
Ce:Gd3Ga3Al2O12
Kei Kamada1, Yasuhiro Shoji2, Vladimir V. Kochurikhin2, Aya Nagura3, Satoshi Okumura4, Seiichi. Yamamoto4,
Jung Yeol Yeom5, Shunsuke Kurosawa1, Jan Pejchal1, Yuui Yokota1, Yuji Ohashi3, Martin Nikl6,
Masao Yoshino1, and Akira Yoshikawa1
1. New Industry Creation Hatchery Center, Tohoku University, Sendai, Miyagi, Japan
2. C&A corporation, Sendai, Miyagi, Japan
3. Institute for Material Reseach, Tohoku University, Sendai, Miyagi, Japan
4. Graduate School of Medicine Department of Radiological and Medical Laboratory Sciences, Nagoya University,
Higashi-ku, Nagoya, Japan
5. Korea University, Seongbuk-gu, Korea
6. Institute of Physics AS CR Cukrovarnicka 10, Prague, Czech Republic

Abstract:
The 3 inch size Mg co-doped Ce : Gd3Al2Ga3O12 single crystals were prepared by the Czochralski (Cz) method.
Absorption and luminescence spectra were measured together with several other scintillation characteristics, namely
the scintillation decay and light yield to reveal the effect of Mg co-doping. The timing resolution measurement for apair of 3 × 3 × 3 mm3 size GAGG:Ce.Mg scintillator crystals was performed using Si-PMs.

E-mail Address:
kamada@imr.tohoku.ac.jp
Site Address:
http://ieeexplore.ieee.org/document/7454881/

108

IEEE TRANSACTIONS ON NUCLEAR SCIENCE 63, 486, Published: APR2016

Single Crystal Growth of Cerium and Praseodymium Doped YCa4O(BO3)3 Scintillator by
Micro-Pulling Down Method
Kei Kamada1, Shunsuke Kurosawa1, Yuui Yokota1, Jan Pejchal2, Yuji Ohashi3, Masao Yoshino3, and Akira
Yoshikawa1,3
1 New Industry Creation Hatchery Center, Tohoku University, Sendai, Miyagi, Japan
2 Institute of Physics AS CR Cukrovarnicka 10, Prague, Czech Republic
3 Institute for Material Reseach, Tohoku University, Sendai, Miyagi, Japan

Abstract:
Ce and Pr doped YCOB single crystals were grown by the micro-pulling down (μ−PD) method and characterized as
for the structure and chemical composition. The expected 420 nm emission of Ce3+ 4f-5d has been observed in
Ce:YCOB. Pr:YCOB shows broad emission spectrum peaking around 350 nm and this emission can be wellascribed to the 5d–4f emission of Pr3+ Luminescence and scintillation characteristics of these crystals
were also investigatedE-mail Address:
kamada@imr.tohoku.ac.jp

Site Address:
http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=7454829

109

LASER PHYSICS LETTERS, 13, 035402, Published: FEB2016

Random laser action in stoichiometric Nd3Ga5O12 garnet crystal powder
I Iparraguirre1, J Azkargorta1, K Kamada2,4, A Yoshikawa2,4,5, U R Rodríguez-Mendoza3, V Lavín3, M BarredoZuriarrain1, R Balda1,6 and J Fernández1,6
1 Departamento de Física Aplicada I, Escuela Superior de Ingeniería, Universidad del País Vasco UPV/EHU, Alda.
Urquijo s/n, 48013 Bilbao, Spain
2 New Industry Creation Hatchery Center (NICHe), Tohoku University, 6-6-10 Aoba, Aramaki, Sendai 980–8579,
Japan
3 Departamento de Física, MALTA Consolider Team, Instituto Universitario de Estudios Avanzados en Física
Atómica, Molecular y Fotónica (IUdEA), and Instituto Universitario de Materiales y Nanotecnología (UMN),
Universidad de La Laguna, 38200 San Cristóbal de La Laguna, Santa Cruz de Tenerife, Spain
4 C&A Corporation, Sendai 980-8579, Japan.
5 Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Sendai 980-8577, Japan.
6 Materials Physics Center CSIC-UPV/EHU and Donostia International Physics Center, 20018 San Sebastián,Spain.

Abstract:

This work explores the room temperature infrared random laser (RL) performance of Nd 3+ ions in a new
stoichiometric Nd3Ga5O12 crystal powder. The time-resolved measurements show that the RL pulse is able to follow
the subnanosecond oscillations of the pump pulse profile. The pump threshold energy and the absolute stimulated
emission energy have been measured using a method developed by the authors. The laser slope efficiency is thehighest compared to other Nd3+ stoichiometric RL crystals.

E-mail Address:
i.iparraguirre@ehu.eus

Site Address:
http://iopscience.iop.org/article/10.1088/1612-2011/13/3/035402/meta

110

JAPANESE JOURNAL OF APPLIED PHYSICS 54, O4DH17-1, Published: MAR2015

Improvement of scintillation properties on Ce doped Y3Al5O12 scintillator by divalentcations co-doping
Aya Nagura1, Kei Kamada2,3, Martin Nikl4, Shunsuke Kurosawa1,2, Jan Pejchal2,4, Yuui Yokota2, Yuji Ohashi1 andAkira Yoshikawa1,2,3
1 Institute for Material Research, Tohoku University, Sendai 980-8577, Japan
2 New Industry Creation Hatchery Center, Tohoku University, Sendai 980-8579, Japan
3 C&A Corporation, Sendai 980-8579, Japan
4 Institute of Physics AS CR, 16253 Prague, Czech Republic

Abstract:
The Mg co-doped Y3Al5O12:Ce single crystal scintillators were prepared by micro pulling down method in a wide
concentration range 0–3000 ppm of Mg co-dopant. Absorption and luminescence spectra were measured together
with several other scintillation characteristics, namely the scintillation decay, light yield to reveal the effect of Mg
co-doping. The scintillation decays were accelerated by Mg co-doping. The Mg co-doped samples showed much
faster decay with increasing Mg.

E-mail Address:
kamada@imr.tohoku.ac.jp
Site Address:
http://iopscience.iop.org/article/10.7567/JJAP.54.04DH17

111

IEEE TRANSACTIONS ON NUCLEAR SCIENCE 63, 433, Published: FEB2016

The Stable Ce4+ Center: A New Tool to Optimize Ce-Doped Oxide Scintillators
Martin Nikla, Vladimir Babina, Jan Pejchala, Valentin V. Lagutaa, Maksym Buryia, Jiri A. Maresa, Kei Kamadab,Shunsuke Kurosawac, Akira Yoshikawac, Dalibor Panekd, Tomas Parkmand, Petr Bruzaa, Klaus Manne, and Matthias
Müllerea Institute of Physics AS CR, Prague, Czech Republicb New Industry Creation Hatchery Center, Tohoku University, Sendai, Japanc Institute for Materials Research, Tohoku University, Sendai, Japan cd FBME, Czech Technical University, Kladno, Czech Republic
e Laser Laboratorium Göttingen e. V., Göttingen, Germany

Abstract:

The role and effect of stable Ce4+ centers in Ce-doped LuAG single crystal scintillator is further studied by means ofmeasurements of several optical, luminescence and scintillation characteristics. Two LuAG:Ce single crystal
samples are compared: in one of them the dominating Ce 4 + center is stabilized by high concentration Mg2+ codoping
while the other one shows only the presence of stable Ce 3 + center. Tailored (Eu, Mg)-doped LuAG single crystal isalso prepared to test the presence and thermal stability of hole traps in the host which affect the timing
characteristics of Ce4+ scintillation cycle, namely its restoration back to 4+ charge state in last step of the cycle. EPR
experiment was also employed at Mg- and (Eu, Mg) doped LuAG samples and the signature of the O - hole centerstabilized by Mg2 + ion was clearly obtained.

E-mail Address:
nikl@fzu.cz

Site Address:
http://ieeexplore.ieee.org/document/7412783/

112

IEEE TRANSACTIONS ON NUCLEAR SCIENCE 63, 453, Published: MAR2016

Growth and Luminescence Properties of Eu:SrI2 Single Crystals Prepared by Modified
Micro-Pulling-Down Method
Robert Krála, Vítězslav Jarýa, Jan Pejchala, Shunsuke Kurosawab, Karel Nitscha, Yuui Yokotac, Martin Nikla, andAkira Yoshikawaca Institute of Physics AS CR, Prague 6, Czech Republicb Institute for Materials Research (IMR), Tohoku University, Aobaku, Sendai, Japanc New Industry Creation Hatchery Center (NICHe), Tohoku University, Sendai, Japan

Abstract:
This paper reports on the preparation and growth of Eu-doped strontium iodide (SrI2) single crystals by modified
micro-pulling-down method. Influence of the Eu2 + and Eu3 + (introduced in form of EuI2 and EuCl3) on theluminescence and scintillation properties is analyzed. Sufficient optical quality of prepared single crystals was
obtained allowing further characterization of their absorption, radio- and photoluminescence spectra.
Photoluminescence and scintillation decay time of grown SrI 2 crystals irradiated under γ-ray source were evaluatedas well.

E-mail Address:
rkral@fzu.cz
Site Address:
http://ieeexplore.ieee.org/document/7425276/

113

OPTICAL MATERIALS 58, 5, Published: AUG2016

Temperature-dependent evaluation of Nd:LiCAF optical properties as potential vacuum
ultraviolet laser material
Yuki Minamia, Ren Aritaa, Marilou Cadatal-Radubana, b, c, Minh Hong Phama, c, d, Melvin John Fernandez Empizoa,
Mui Viet Luonga, Tatsuhiro Horia, Masahiro Takabatakea, Kazuhito Fukudaa, Kazuyuki Moria, Kohei Yamanoia,
Toshihiko Shimizua, Nobuhiko Sarukuraa, Kentaro Fukudae, Noriaki Kawaguchie, Yuui Yokotaf, Akira Yoshikawae, f
a Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japanb Centre for Theoretical Chemistry and Physics, Institute of Natural and Mathematical Sciences, Massey
University, Albany, Auckland 0632, New Zealandc Institute for Academic Initiatives, Osaka University, 1-1 Yamadaoka, Suita, Osaka 565-0871, Japand Institute of Physics, Viet Nam Academy of Science and Technology, 10 Dao Tan, Ba Dinh, Hanoi, Viet Name Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi 980-8577, Japanf New Industry Creation Hatchery Center, Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi
980-8579, Japan

Abstract:

We investigate the temperature-dependent optical properties of Nd3+-doped LiCaAlF6 (Nd:LiCAF) in the vacuum
ultraviolet (VUV) region. The 172-nm absorption edge does not seem to experience any significant blue shift as
temperature is decreased from room temperature down to 30 K. This is confirmed by excitation spectra for the same
temperature range. Several energy levels in the excited state configuration are observed. Based on these energy
levels, the dominant emission peak at 177 nm is assigned to the allowed dipole transition from the 4f25d
configuration of Nd3+ and the 4I11/2 level of the 4f3 ground state configuration. The position of the dominant 177-nm
emission peak appears to be fixed across the temperature range considered. Our results suggest that the spectral
overlap between the excitation and emission spectra should not increase as temperature is raised, possibly making
Nd:LiCAF a potential VUV laser gain medium operating at room temperature.

E-mail Address:
minami-y@ile.osaka-u.ac.jp
Site Address:
http://www.sciencedirect.com/science/article/pii/S092534671630235X

114

Proceedings of the 29th Workshop on Radiation Detectors and Their Uses, Published: DEC2015

Scintillation Properties Of Mg Co-doped Ce:(Gd, La)2Si2O7 Grown By Czochralski
MethodRikito Murakami1, Shunsuke Kurosawa1,2, Yasuhiro Shoji1,3, Yuui Yokota2, Jan Pejchal2,4, Yuji Ohashi1, Kei
Kamada2,3 and Akira Yoshikawa1,2,3
1 Institute for Material Research, Tohoku University, Sendai 980-8577, Japan
2 New Industry Creation Hatchery Center, Tohoku University, Sendai 980-8579, Japan
3 C&A Corporation, Sendai 980-8579, Japan
4 Institute of Physics AS CR, 16253 Prague, Czech Republic

Site Address:
https://lib-extopc.kek.jp/preprints/PDF/2015/1525/1525008.pdf

1152015（平成27年）2月14日（土）日本経済新聞1162015（平成27年）3月7日（土）
河北新報

117

2015（平成27年）5月22日（金）
河北新報

118

2015（平成27年）9月4日（金）科学新聞

119日経サイエンス 平成27年11月

120

Event Photo

4/15 Hanami

4/19 IMR Hanami

5/29
Farewell Party

6/22-27 UVSOR

121

7/11 Climbing team

7/16 IMR Beer Party

8/2- ACCGE

8/17-20 Nagasaki Symposium

8/27 IMR Volleyball Games

9/21-25
LUMDETR2015

122

10/23,30 IMR
FutsalIEEE

One day

12/25 Year end Party

1/12 Doctor thesis1231/15 New year Party

2/4-5 INTELUM Meeting

2/6-8 Fukushima Symposium

2/27-3/4 CERN & IS-OM7

3/9 Farewell Party

3/25 Graduation ceremony

124

Yoshikawa Lab.
Research Report
Published on 30 Dec. 2016

ANNUAL REPORT 2015
編集・発行
東北大学 金属材料研究所
吉川研究室
吉川彰
Edited and published by
A. Yoshikawa
Yoshikawa Laboratory
Institute for Materials Research,
Tohoku University