English Abstracts

1S01
Basic
ScienceandApplicationsof
Nanocarbons for Green Innovation
Endo, M. (Faculty of Engineering, Shinshu Univ.)
Carbon nanotubes have attracted lots of attention fromvarious fields of scientists because they exhibited
extraordinary physical and chemical properties due to theirintrinsic nano-sized one-dimensional nature. It should be
noted that lots of carbon nanotube-derived products are
already in use and their viability strongly depend on theircommercialization. Among them, we have developed asuper rubber sealant that is able to withstand temperatures
up to 260°C and pressures as high as 239MPa byincorporating surface-modified carbon nanotubes into
fluorine rubber. Thus our rubber sealant will contribute to arevolutionary enhancement in the oil recovery efficiency
from the current 35 % to more than 70 % by excavating
previously inaccessible deposits. However, the biggest
hurdles in nanotube business are considered to be the thesafety issue of carbon nanotubes. By sharing the all
information on risks and benefits of the materials with all
stakeholders, we are abel to prove the carbon nanotubes tobe the green and safe innovative materials by responsible
production and use in the 21st century.
2S04
Study on the environmental uranium isotope
Aya Sakaguchi (Hiroshima Univ.)
The uranium normally found in nature consists ofthree isotopes of mass numbers 234, 235 and 238. They
exist ubiquitously on earth, and show the specificconcentration and composition of isotope. By using thesefeatures, uranium isotope in the environment has been used
as a fingerprint of the uranium contamination and tool forthe study of geochemistry/geosciences.
Recently, the uranium isotope 236U (T1/2=2.342×107 y,
α-decay) has been recognized as one of the “environmental
Uranium(U) isotopes” due to the development of
instruments and measuring techniques of sufficientabundance sensitivity, and applications which use 236U as aproxy/tool for environmental and geochemical uranium
studies are developing.
One of the main source of 236U at the surface
environment is globalfallout which was introduced from theatmospheric nuclear test in 1960s. The global fallout 236U
level in soil was deduced from measurements of 236U,
239+240
Pu and 137Cs in surface soils which are solely
influenced by global fallout. Soil cores of 30 cm depth werecollected from undisturbed flat areas in Japan.
Concentrations of 239+240Pu and 238U, atom ratios of239
Pu/240Pu and 236U/238U were determined by D-particle
spectrometry, ICP-MS and accelerator mass spectrometry(AMS), respectively. Consistent 236U/239Pu ratios between
0.212 to 0.253 were found. Using this ratio, the total global
fallout of 236U on the earth is estimated to be as much as ca.
900 kg. This knowledge will contribute to the promotion ofresearch on U isotopes, including 236U, for the fields ofgeo-resources, waste management and geochemistry.
2S01 Fukushima Daiichi NPP Accident, details ofaccident event and current status
YAMANA, H.
(Research Reactor Institute, Kyoto
University)
Due to the massive earthquake and devastating
Tsunami happened on March 11th, 2011 Fukushima Daiichi

Nuclear Power Plant suffered serious loss of core cooling
function. It led to extensive core meltdowns of three units,
and to serious building failures caused by hydrogen
explosion which as generated from the severe accident
process. As a result, massive amount of radioactive
nuclides were released to the atmosphere resulting in thelarge regional contamination and radiation exposure to the
public. The restoration of the plants is ongoing, and theaccomplishment of cold shut down of three units is expected
before the end of January 2012. Discussions on thepossible measures to be taken after the completion ofcurrent restoration program, has been started under theframe of Atomic Energy Commission. It will draw aroadmap for further restoration and clean-up, including
removal of spent fuels, inner inspection of the damaged
cores, as well as removal of damaged fuels and debris.
This paper reviews the accident of Fukushima Daiichi
Nuclear Power Plant, in terms of the technical details ofaccident process, current status, and future prospect of
restoration.
2S02
Behavior of radionuclides in the environment
and their transfer to foodstuffs.
Y. Muramatsu (Gakushuin Univ.)
The most important radionuclides released from theaccident of Fukushima Daiichi are Xe-133 (half-life: 5.2d),
I-131 (8.0d), Cs-134 (2.1y) and Cs-137 (30y). Although theamount of Xe-133 released was very large, this nuclide is
not so important related to radiation safety, because of its
non-reactivity to vegetations and soils. I-131 is important in
the first one month and high concentrations in leafy
vegetables were observed. However, due to its shorthalf-life, the concentration levels in agricultural crops
decreased with time. In case of radiocesium, attention
should be paid to the uptake of this nuclide from soil toplants. At the beginning of April, the government
recommended a guideline for the maximum concentrationof radiocesium in soil as 5000 Bq/kg. This value was basedon the soil-rice transfer factor of 0.1, which was estimatedfrom the values of previous studies in Japan. Radiocesium
concentrations in some agricultural crops (tea, apricot,
mushrooms, etc) exceeded the guideline for radiocesium infoodstuffs (500 Bq/kg). Mechanisms in the transfer of thenuclide in to these crops have been studied.
I will summarize behavior of radiocesium and someother nuclides in the environment and possible pathways tofoodstuffs and drinking water.
2S03
Biological effect of radiation: basis forunderstanding the risk of Fukushima Nuclear Accident
Imaoka, T. (Natl. Inst. Radiol. Sci.)
The radionuclide release in the Fukushima Nuclear
Accident has induced a tremendous anxiety on possible
health effects of low dose radiation. When radiation hits acell in an organism, it may induce DNA damages which, if
not repaired properly, lead to either cell death or genetic
mutation. If function of the tissue is lost as a result of cell
death, various tissue responses including dysfunction ofhematopoietic tissues, sterility and skin responses may
occur; these responses are not manifested if the radiationdose is low enough. Genetic mutation is considered to occur,
albeit at a low frequency, even if the radiation dose is verysmall. Cancer is a result of genetic mutation and its

probability is considered to rise, albeit slightly, if radiationinduces a small amount of additional mutations. Theseassumptions lead to a notion that there is no “safety dose”
below which radiation does not cause any cancer. On theother hand, the study of atomic bomb survivors ofHiroshima and Nagasaki provides the most reliable
quantitative information on the relationship between
radiation dose and accompanying increase in cancer risk.
The analysis so far indicates that cancer risk increases by
0.5-fold, compared to a background level, if a human bodyis exposed to 1 sievert of radiation; at lower doses, the risk
is proportional to the dose, but it is impossible to detect
cancer risk associated with 100 millisievert of exposure
because of statistical limitations. Although exposure toatomic bomb radiation occurred in a very little instance, thecurrent situation poses a prolonged (i.e., low dose rate)
exposure, probably resulting in still lower cancer risk. Still,since current radiation exposure has no benefit, unlike thatin medical situations, it is important to reduce it to a level as
low as reasonably achievable.
I will explain the biological effect of radiation,
including its mechanistic basis and effects on the human
body, and wish to help the audience to understand theimpact of the accident on public health.
1T01
Characteristics
of
distributionofradionuclides from Fukushima Daiichi Nuclear Power
Station in Fukushima prefecture and neighborprefectures obtained by a gamma-ray measurement
immediately after the accident
Matsumura, H., Saito, K. (KEK), Ishioka, J., Uwamino, Y.
(RIKEN)
In order to investigate diffusion of radioactive
materials from the Fukushima Daiichi Nuclear Power
Station, in Fukushima and neighboring prefectures, the dose
rates and γ-ray spectra were measured on expressways on
March 15, 16, 17, and April 8, 2011. A 1.5-inch LaBr3 γ-ray
spectrometer was used for the measurement. A radioactive
plume was observed at Koriyama-higashi interchange on theafternoon of March 15. The radioactive materials arrived in
the Nakadori region of Fukushima prefecture was depositedby rainfall on the afternoon of March 15. Although the
distributions of 132Te, 132I, 134Cs, 136Cs, and 137Cs weresimilar, the distribution of 131I was different from the others.
There were low 131I deposition areas in the Nakadori regionof Fukushima prefecture.
1T02
Survey of the radiation by a car borne survey
method and Jray spectrometry by NaI detector in
Fukushima Prefecture
Sugihara, S., Ichikawa, R., Maekawa, A., Matsuzaki, T.,
Kawamura, H., Momoshima, N. (Kyushu Univ.)
The Tohoku District-off the Pacific Ocean Earthquake
and Tsunami caused by the earthquake attacked the
Fukushima Dai-ichi Nuclear Power Plant of TEPCO on
March 11, 2011. A nuclear accident followed at an
unprecedented scale and huge amounts of radioactive
material were released into the environment.
Distributions of dose rate in Fukushima prefecture
were measured on April 18-21 and June 20-22, 2011 by a
car borne survey method using a NaI(Tl) scintillation survey
meter. The gamma-ray spectrometry by a NaI(Tl) detector
was also done at several points. Dose rate near Fukushima

Dai-ichi NPP and at iitate-mura, fukushima-city was high( 1 ～ >30 PSv/h). So distribution of dose rate is uneven,further investigation is necessary. The gamma-ray peak of
I-131, Cs-134 and Cs-137 were mainly detected in
gamma-ray spectrum.
1T03
Radioactivities from the accident ofFukushima 1 Nuclear Power Plant - Observation atRadioisotope Center, University of Tsukuba.
Sueki, K., Suzuki, M., Sakamoto, K., Ito, T., Furukawa, J.,
Oshio, H., Matsumoto, H. (RIC, Univ. Tsukuba)
A tremendous amount of radioactivity in theatmosphere and in the sea was discharged due to the core
meltdown accident of nuclear reactors in the Fukushima
No.1 nuclear power plant in March 2011. The radioactive
substance has reached Tsukuba away about 170 km in thesouth-southwest from the nuclear power plant. It reported
that the effective dose rate measured at the radiation
monitor and the radioactivities measured the collection of
atmospheric suspended dust used by low volume air sampler,
the collection of rain water, and surface soil at Radioisotope
Center, Univ. of Tsukuba. The analysis of J-ray
spectroscopy confirmed the radionuclides such as 131I, 132Te(->132I), 134Cs, 136Cs, and 137Cs. We report the time variationof the radioactivity concentrations of several radionuclides
at Univ. of Tsukuba.
1T04
Radioactivity in atmospheric particulates
collected at Hachioji, Hino, and Kazo.
Oura, Y., Matsuda, K., Yonemochi, S., Igarashi, Y., Ebihara,
M. (Tokyo Metropolitan Univ., Meisei Univ., Center for
Environ. Sci. in Saitama, Meteorological Research Insti.)
The radioactivity in PM2.5 atmospheric particulatematters collected at Hachioji, Hino, and Kazo cities after
Great East Japan Earthquake have been measured. At
Hachioji, total suspended particulate matters (TSP) andgaseous matters were also collected. Radioactivity inatmospheric particulates decreased with high concentration
peaks on 15 Mar, 21-22 Mar., 30 Mar., and 17 Apr.
Radionuclides leaked from crippled nuclear power plants
were found to be concentrated in fine particulates
comparing PM2.5 with TSP and 131I suspended as gaseous
species in the air were about 4.5 times in average moreabundant than as solid species. It is simply estimated thatcitizen in Hachioji intake about 35 kBq of 131I and 5.4 kBq
of 134+137Cs after the nuclear power plant accident.
1T05
Atmospheric radionuclides detected at
Fukuoka, Japan released from the Fukushima Daiichi
nuclear power complex following the nuclear accident
Momoshima, N., Sugihara, S., Ichikawa, R., Yokoyama, H.
(Kyushu Univ.)
Radionuclides from the Fukushima nuclear accident
were detected at Fukuoka, Japan, 1000 km distance westerly
from the Fukushima Daiichi nuclear power complex. The
first arrival of 131I was confirmed on March 17, 2011 within
3 days after the release, indicating the 131I was probablytransported to Fukuoka dispersively due to local
meteorological condition, not a global air circulation. A
maximum concentration, as much as 5.07 mBq m-3 for 131I,
4.04 mBq m-3 for 134Cs, 4.12 mBq m-3 for 137Cs wasrecorded in particles collected on April 6, 2011; however
the level decreased below the detection limit after April 23,

2011. Gaseous 131I occupied 30 % to 67 % of the total 131I.
The increase in internal dose by inhalation was negligible at
Fukuoka.
1T06
Radiochemical Analysis of Fission and
Neutron Activation Products released by Fukushima
Nuclear Power Plant Accident.
KOJIMA, S., ARINOBU, T., KOSUDA, C., KATO, M,(Aichi Med. Univ.), FURUKAWA, M. (CNIC)
This paper describes the determination of thecomposition and content of fission and neutron activation
products in the environment released by Fukushima Daiichi
Nuclear Power Plant Accident.
A soil sample wascollected on May 19 at Namie-cho Sakai, Fukushima
Prefecture, 8 km northwest from Fukushima Daiichi
Nuclear Power Plant.
Non-destructive gamma-ray
spectrometry had been performed with a well-type Ge
detector before radiochemical analysis, and six gamma-ray
emitting radionuclides, 137Cs, 134Cs, 129mTe, 110mAg, 136Cs and140
Ba(140La) were measured in the soil sample. The highradioactive concentrations of 137Cs and 134Cs were obtained
to be 1880 and 1530 Bq･g-1, respectively. Radiochemical
separation by precipitation, solvent extraction andanion-exchange removed those radionuclides. Analyticalresults indicate that the radioactive contents of fission
products, 141Ce, 144Ce and 125Sb were ranged from four
ten-thousandths to one thousandth relative to the amount of137
Cs. Four neutron induced radionuclides, 114mIn, 54Mn,
58
Co and 60Co, were detected. The concentration of 114mIn
was about one thousandth to 137Cs, and the others were lessthan one tenth relative to 114mIn. We conclude that 110mAg
and 114mIn were produced by the neutron capture reactions in
nuclear control rods made of silver-indium-cadmium alloys.
1T07
Spatial distribution of Iodine-129 in surface
soil around the Fukushima Daiichi nuclear power plant
Y. Miyake, K. Tagi (Faculty of Eng., Univ. Tokyo), H.
Matsuzaki, T. Fujiwara. T. Saito, T. Yamagata Y. Tsutiya, C.
Nakano (School of Eng., Univ. Tokyo), M. Honda (Collegeof humanity and Sci., Nihon Univ)
Due to the accident at the Fukushima Daiichi nuclear
power plant, which was caused by the Great East Japan
Earthquake, a lot of radioactive materials were released into
the environment. Among them, Iodine-131, which has ashort half-life of 8 days, is thought to be hardly detected
after the accident is concluded. It is very important toresearch how leaked out Iodine-131 was diffused in order toestimate the health impact of radiation at the time of theaccident. On the other hand, Iodine-129, which was leakedout and was thought to act chemically-identically as
Iodine-131, has an extremely long half-life of 15.7 million
years and we are able to measure it equally after theaccident. By following the trail of Iodine-129, it isconsidered to estimate the distribution of Iodine-131. To dothis, at first, it is essential to measure simultaneously
Iodine-131 and Iodine-129 in the same sample picked fromnear-the Fukushima Daiichi nuclear power plant andexamine the relation between them (for example, theisotopic ratio of Iodine derived from the nuclear power plant(I-129/I-131)).
At this study, we measured Iodine-129 in surface soil
within 60 kilometers of the Fukushima Daiichi nuclear
power plant, which was picked by research team of Nuclear

Engineering Research Laboratory, Faculty of Engineering,
The University of Tokyo. We discuss Iodine-129 derived
from the nuclear power plant by considering theconcentration range, the relation of a distance or a direction
from the nuclear power plant, and the relation between
I-129 and other radioactive nuclides (Cs-134, Cs-137,
I-131). Since Iodine-129, which had been leaked out fromthe nuclear fuel reprocessing plant in Europe, was alreadytransferred to Japan by way of the atmospherictransportation before the accident, it is important todistinguish between Iodine-129 from this accident and fromthe reprocessing plant. Then, we want to obtain the
I-129/I-131 ratio originating in the accident precisely anddiscuss the relation between the fuel burn-up and it.
As the way of experiment, iodine was extracted fromsoil and mixed with a carrier and I-129/I-127 ratio wasmeasured by means of AMS (Accelerator Mass
Spectrometry) at MALT (Micro Analysis Laboratory,
Tandem accelerator, The University of Tokyo). Iodine-131
was measured by a germanium detector and Iodine-127 was
measured by ICP-MS.
As a consequence, there appeared a certain amount ofcorrelation between I-129 and I-131 from soil. However,about the isotopic ratio, there seemed variability. In thisstudy, we discussed, as factors of variability, the incomplete
homogeneity of soil samples treated, the yield of recovered
Iodine when we burned soil, and types of soil. Because
analysis samples are limited at this time, we don’t still reachthe conclusion. But, we obtained some knowledge and we
intend to report them.
1T08
Radioactivity survey on the Fukushima
nuclear accident in Fukushima and Western Kanto
Kinoshita, N.1, Sueki, K.2, Kitagawa, J. 2, Ikarashi, S. 2,
Nishimura, T.3, Wong, Y.S. 3, Satou, Y. 3, Handa, K.4,
Takahashi, T.5, Sasa, K. 5, Sato, M.6, Yamagata, T. 6
(1Inst. Tech., Shimizu Co., 2Pure and Appl. Sci., Univ. of
Tsukuba, 3Life and Env. Sci., Univ of Tsukuba, 4Sci. andEng., Univ of Tsukuba, 5Res. Facility Center for Sci. andTech., Univ. of Tsukuba, 6College of humanity and Sci.,
Nihon Univ.)
A tremendous amount of radioactivity was discharged
due to the damage to cooling systems of nuclear reactors in
the Fukushima No.1 nuclear power plant in March 2011.
Fukushima and its adjacent prefectures were contaminatedwith fission products from the accident. We’ll show
geographical distributions of individual radionuclides in thesurface soils of central-east Japan as determined by gamma
ray spectrometry. Especially in Fukushima prefecture,contaminated area spreads around Iitate, Namie, andNaka-Dori for the all radionuclide we measured.
Distributions of the radionuclides were affected by thephysical state of each nuclide as well as geographicalfeatures. Considering meteorological conditions, it isconcluded that the radioactive material transported on 15
March was the major contributor to contamination in
Fukushima prefecture, while that transported on 21 March
was the major source in Ibaraki, Tochigi, Saitama, andChiba prefectures.
1T09
Studies on the transfer of radiocesium into
fruits during their growth
Y. Muramatsu1, T Ohno1, M.Sato2, K.Oda1, M.Abe2, K.Abe2,

T.Ohtsuki2 (1Gakushuin Univ., 2Fukushima Agri. Tech. Ctr.,
3
Tohoku University)
Concentrations of radiocesium in several fruits
collected from Fukushima-Prefecture and other areas inJapan were determined with Ge-detectors. It was found thatJapanese apricot (Ume) had relatively higher radiocesium
concentrations compared to other fruits. This could be
explained by the fact that they were blooming at the major
release of the nuclides and radiocesium was deposited in theblossoms, which resulted in the contamination. In case ofother fruits such as peaches, cherries, grapes etc, someenhancements of the concentrations were thought to be dueto the translocation from the barks, which were
contaminated with radiocesium. The concentrations ofradiocesium in the fruits such as peaches and cherries
decreased with their growth. Mechanisms of radiocesium
contamination of fruits and also some other plants (e.g.
bamboos and tee) will be discussed.
1T10
Depth profiles of radioactive cesium andiodine released from the Fukushima Daiichi nuclear
power plant and their transfer to the agricultural crops
OHNO, T.1, MURAMATSU, Y.1, MIURA, Y.2, ODA, K.1,
INAGAWA, N.1, OGAWA, H.1, YAMAZAKI, A.1,
KOBAYASHI, T.3, NIKAIDO, H.2, SATO, M.3, KATO, Y.3(1Gakushuin Univ., 2Fukushima Pref. Agri., 3Fukushima
Agri. Tech. Ctr.)
In order to understand the behavior of the radionuclide
released from the Fukushima Daiichi nuclear power plant,
we have measured depth distributions of radioactive cesium
and iodine in different agricultural fields and forests. Our
results demonstrate that more than 90% radionuclides were
distributed from the surface to 6cm in depth. It is
important to investigate transfer of the radionuclide to theagricultural crops. In this study, we have also determinedtransfer factors of radiocesium to agricultural crops such as
cucumbers, tomatoes, eggplants and green peppers using thesoils collected in Fukushima prefecture.
1T11
Depth profile of 129I concentration in soil at
Abukuma, Fukushima
Honda, M. (Nihon Univ.), Matsuzaki, H. , Yamagata, T. ,Tuchiya, Y. , Nakano, C. (The University of Tokyo)Matushi,
Y. (Kyoto Univ.), Nagai, H. (Nihon Univ.).
Two 30cm forest soil core sample were collected
before the Fukusima Daiichi nuclear power plant accident(ABK2) and after the accident (ABK3), and a field soil coresample (ABK12) was collected after the accident at
Abukuma, Fukushima. The depth profile of 129I
concentration in soil at Abukuma, Fukusima have beenmeasured by AMS at MALT, the University of Tokyo. At
the top of 1.5cm, 129I/127I ratio in ABK3 was five times
higher than ABK2, which imply accumulation of 129I ejectedby the Fukusima Daiichi nuclear power plant. For the otherdepth of these cores, ABK2 and ABK3, almost same depth
profiles of 129I/127I were observed. The surface 129I/127I ratioin ABK3 was 31 times higher than Tamatsukuri,
Miyagi(1.8×10-9, Y. Muramatsu et al. 2007) and 1/5 of theTokai-mura, Ibaraki(3.0×10-7, Y. Muramatsu et al. 1985).
Since ABK12 is well mixed paddy field, depth profile
of 127I concentration was constant and 127I concentration was
lower than forest soil(ABK2, 3). 129I/127I decreases rapidly
from surface to 9cm, and then became constant. From thisresult, we considered accident origin 129I were accumulated
in the 9 cm of surface layer, and the 129I inventory wasestimated to 5.68×1011 atoms m-2.
1T12
Removal of cesium from radioactive
contaminated sea water using ferrocyanide-containing
adsorbent
Suzuki, T., Kaneshiki, T., Nomura, M. (Tokyo Tech)
A large quantity of radioactive contaminated sea water
was generated, because the sea water was used to cool thereactor emergently at Fukushima nuclear power plant
accident. This radioactive contaminated sea water ispreferable to be discharged into the ocean after the removal
the radioactive nuclides. In the present work, the removal ofcesium from radioactive contaminated sea water wasinvestigated using the ferrocyanide-containing adsorbent.
Three types of ferrocyanide- containing adsorbents were
tested. One is the adsorbent containing nickel ferrocyanide
fixed by resin, which is provided by Purolite. Another is theadsorbent containing Prussian blue (ferric ferrocyanide)
fixed by resin, which is manufactured by Nihon Kaisui Co.,
Ltd. Last one is the zeolite-supported ferric ferrocyanide,
which is manufactured in our laboratory on trial. The
adsorption properties of cesium on these adsorbents were
estimated by batch experiment using sea water with 10ppm
of stable cesium ion. It was confirmed that the either
adsorbents have the large distribution coefficient andsufficient property of removal of cesium from sea water.
2T01
Radiation education in elementary and juniorhigh school
Nakajo, S. (Grad. School of Edu., Shinshu Univ.)
Ministry of Education, Culture, Sports, Science andTechnology （MEXT） revised the Courses of Study forelementary and junior high schools in March 2008. In thisrevision, the radiation education was introduced again after
an interval of few decades. It is emphasized to makereference to the following points as part of learning about
energy resources.
Nuclear power is the energy released form nuclear
fuels, such as uranium.
Nuclear fuels emit radiation, but radiation is alsopresent in nature.
Radiation has a transparency that is utilized in medical,
manufacturing fields, and so on.
On the other hand, the Fukushima Daiichi Nuclear
Power Station accident caused by the earthquake on March
this year has made most people take a great deal of interestin radiation and radioactivity. A large majority of people
wants to acquire proper knowledge and general
understanding of radiation. Under these circumstances,
several educational research works have been carried out inclasses of elementary and junior high schools.
2T02
2T03
For education of radiation as science
Kudo, H. (Tohoku Radiation Science Center)
Disastrous release of raddionuclides from Fukushima
Daiichi Nuclear Power Station in the aftermath of big
earthquakes and tsunamis on March 11, 2011 is giving hard
influence on Japanese daily lives. People’s attention is
focused on health concerns, but most people are confusedabout what they should do, because of a lot of inadequate
information given by a variety of mass media thatexaggerate the risk of radiation. At present, therefore,
adequate social and school education of radiation based on
science is required. Scientific knowledge of radiation and its
reactions with matter would help people decide theirrational behavior, not to be in a panic. Educators should
keep in mind the adequate use ofterminology in thecourse of education; e.g., discrimination of radiation andradioactivity. Good news is resumption of a radiation classin the science curriculum of middle high school in the next
year after 3 decades of suspension.
2T04
2T05
Societies’ Response to the nuclear power plant
accident in Fukushima – Cooperation is essential
Ebihara, M (Grad. School of Sci. & Eng., Tokyo
Metropolitan Univ.)
A gigantic earthquake (M 9.0) and resulting tsunami
hit the Japanese islands on March 11, 2011. Besides direct
disaster caused by earthquake and tsunami, equally serious
accident happened at Fukushima Daiichi nuclear power
plant of Tokyo Electric Power Company. By this accident,
nuclear power reactors couldn’t been controlled properly
and eventually radioactive materials were released from thebuilding to house nuclear power reactors and dispersed overrather wide area. Consequently, agricultural materials,
drinking water and food were contaminated with radioactive
nuclides. It is urgent to figure out how radioactive materials
were spread not only in the area close to the nuclear reactors
but also over surrounding, rather wide district. Suchinformation must release the uneasiness for public people
and objectively predict the possible influence caused byradioactive material over agricultural products for people
engaging in agriculture.
To grapple with this task promptly as well as
effectively, scientists belonging to the Geochemical Societyof Japan, the Japan Society for Nuclear and Radiochemical
Sciences and the atmospheric and oceanic section of theJapan Geoscience Union were allied and presented a
proposal to MEXT for comprehensive and systematicsurvey of radioactive materials in the environment. In thisproject, samples are to be collected for atmosphere, rain,soils and underground water as systematically as possible
and as wide as possible for the sampling area. As for soil
samples, we decided to work together with volunteer peopleof nuclear physics, who also took similar actions to ours.
After sampling, samples were subjected to precise
measurement of radioactivity under controlled counting
protocol and data thus obtained are to be opened to thegovernmental sector as well as public promptly. At the sametime, scientific meaning and information derived from suchdata are to be reported openly to appropriate academic
societies as well as to the public. From this experience, we
acknowledged that cooperation of related societies isessential for recovering such chaotic circumstances as those
happened in east Japan this year.
1P01
Correlation between Asian Dust (yellow dust)
and specific radioactivities of fission products including
in aerosol in Tokushima, Shikoku Island, due to the
Fukushima nuclear accident

Sakama, M. (School Health Sci., Univ. Tokushima), Saze, T.
(RIC, Univ. Tokushima), Sakaguchi, Y., Fushimi, K.,
Nakayama, S. (Institute Socio Arts and Sci., Univ.
Tokushima)
The serious accident of the Fukushima Dai-ichi
nuclear power plant in the southeast region of Tohoku,
eastern Japan, was caused due to great tsunami following by
the East Japan Earthquake on March 11, 2011, at around14:46 JST. The airborne radioactive isotopes from the
Fukushima Dai-ichi nuclear power plant were measured byanalyzing aerosols at Tokushima, Shikoku Island in westernJapan. The continuous monitoring has been carried out at
Tokushima, Japan. From March 23, 2011 the fission productI-131 was observed. The radioisotopes Cs-134 and Cs-137
were also observed in the beginning of April. During thecourse of our continuous monitoring, we were also able toobserve the seasonal Asian Dust (yellow dust) in the
beginning of May at the same time. We found that thosespecific radioactivities of I-131, Cs-134 and Cs-137 fission
products decrease drastically only for the period of Asian
Dust, however, those levels of naturally occurring nuclides
do not vary well.
1P02
Note on the dependence of radioactivity ratios
of some nuclides on the sampling places
TOMITSUKA, T.1, GOTO, S.2, KODAKA, K.3, KUDO, H.3(1Grad. School of Sci. and Technol., Niigata Univ., 2Center
for Instrumental Anal., 3Fac. of Sci., Niigata Univ.)
Radioactive materials were released from nuclear
reactors of Fukushima Daiichi Nuclear Power Station to the
air as a result of earthquake. Main released radioactive
materials were inferred high volatility or these daughter
nuclides. These materials were diffused in large area of
Fukushima and deposited in the soil. In this work, we
examined the dependence of diffusion and precipitation by
the investigated relative activity of some nuclides. We
estimated the stop time of nuclear reactor by the comparediodine isotope ratios of the ambient area and these of
nuclear reactor.
Soil samples of 5-cm layer from soil surface werecollected by a cylindrical stainless steel apparatus(i.d.15/7inch)and measured soil samples by a high purity Ge
detector coupled with a multichannel pulse height analyzer.
Radio-nuclides in the air were measured by a high purity Ge
detector in Tohoku University.
It was found that the activity ratios of Cs isotopes,
134
Cs, 136Cs, and 137Cs, are about the same in all places
whereas the ratio between different elements, for example
Cs and I, are deviated place to place. In Tohoku University,
radio-nuclides of 131I and 133I were measured and we
presumed stop time of nuclear reactor by these nuclides
ratio. A detailed discussion will be given in the presentation.
1P03
Environmental radioactivity monitoring at
Kakuma campus of Kanazawa university after theaccident of Fukushima nuclear power plant
Nakai, M., Kimura, H., Nagamura, Y., Nakanishi, T., Uesugi,
M., Yokoyama, A. (Kanazawa Univ.)
The Nuclear power plant accident at Fukushimacaused by the earthquake and tsunami disaster in March,2011 led the public to fear the considerable-range
contamination with radioactivity. For the reason, we started
environmental monitoring on radioactivity just outside ofthe RI facility in the Kakuma campus of Kanazawa Univ. A
high-volume dust sampler (SHIBATA, HV-1000) was used
to collect air dust onto a filter and rain water was collected
in a plastic container placed on the rooftop of the facility as
well. The samples were assayed by gamma-ray spectrometerwith germanium detectors to obtain the concentrations ofI-131, Cs-134, and Cs-137. The data were compared withthose measured in the other areas in Japan to discuss how
the activities diffused and migrated from the plant to many
places in Japan. The peaking dates of the activities
coincided with those by a trajectory calculation of air from
Fukushima. The trend was confirmed for the other data inother areas.
1P04
Study on radioactive fallout from Fukushima
nuclear accident by plant samples using an Imaging
Plate System
Minowa, H. (The Jikei University School of Medicine)The radioactive fallout from the Fukushima nuclear
accident was investigated by the radiation images of plant
samples using an Imaging Plate System. Plant samples
exposed by an imaging plate BASIII 2040 (Fujifilm, Japan)
in overnight to one week, and radiation images were read by
Typhoon FLA7000 (GE Healthcare Japan Corp.).
Identifying and quantitative analysis of radionuclides were
measured by Auto Well Gamma System ARC-380CL(ALOKA Co . Ltd., Tokyo, Japan). In the cross-sectional
images of the bamboo shoot, the radioactive material isshown in heterogeneous distribution, it was found that itconcentrated on the tip of the edible portion, and thin skin.
These radionuclides were identified as 137Cs, 134Cs, and 40K.
40
K is a natural radionuclide, on the other hand 137Cs and134
Cs would be derived from the accident of the Fukushima
Daiichi Nuclear Power Plant. A high concentration of 134Cs
was shown at the distance of 150mm from the base of thebamboo shoot by cross-sectional cutting into the width ofabout 1mm. It was estimated about 1kBq of 134Cs would be
included in about 400g (wet weight) of this one bamboo
shoot in an edible part. Imaging data suggests that thecontamination of radioactive cesium in this bamboo shootwas caused not by the extraneous attachment but by theabsorption from roots. Because bamboo is gather waterfrom extensive area, bamboo shoot concentrates theradioactive material contained in the rain even at low
concentrations of radioactive materials in soil.
1P05
Behavior in water system of iodine-129 from
Fukushima Daiichi nuclear disaster
Tokuyama, H., Matsuzaki, H., Yamagata, T. (Univ. Tokyo.),
Honda, M. (Nihon Univ.), Nakano, C., Tsuchiya, Y., Ito, S.,
Morita, A. (Univ. Tokyo.)Because determination of 129I by Accelerator Mass
Spectrometry is a very high sensitivity, measuring theconcentration of 129I in tap water shows clearly the impactof Fukushima Daiichi nuclear accident. So we examined
the range of effects by the accident and natural dilution of
129
I by the aqueous flow, by measuring the concentration of
129
I in tap water samples taken in Tokyo, Nagano, Aomori,and Ehime.
The concentration of 129I in tap water taken in Nagano,
Aomori, and Ehime were lower than 2.69×107 atoms/L
which that of Tokyo before the accident was, while theconcentration of 129I in tap water taken in Tokyo in April

2011 was 1.20×108 atoms/L. This was considered as theimpact of the accident. The concentration of 129I in samples
taken in Tokyo in May and in July 2011 was 6.55×107
atoms/L and 5.91×107 atoms/L, respectively. The
concentration of 129I has been decreased.
1P06 Measurements of the Fukushima nuclear power
plants accident origin 137Cs and 134Cs in soil at remote
place
Matsuzaki, H., Yamagata, T., Honda, M*., Tokuyama, H.,
Miyake, Y., Sunada, N. (Tokyo Univ., *Nihon Univ.)
Radioactive materials emitted from the Fukushima
Dai-ichi nuclear power plant accident were found to be
distributed to a remote places by the air stream due to theclimate condition. Detailed distribution of radioactive
materials even in remote places has to be measured to assess
the true effect of the Fukushima Dai-ichi accident. We
collected several soil samples from top 5cm layer in
Kanagawa prefecture and measured 137Cs and 134Cs by agermanium semi-conductor detector. As an example of theresults, cumulative radioactivity by 137Cs and 134Cs were
distributed between 0.08-0.8 Bq/cm2 and 0.06-0.7 Bq/cm2,
respectively, in Tsurumi district, Yokohama city.
1P07
Deposition flux of 137Cs at Tokyo
Yamagata, T., Tsujita, K., Hirano, Y., Harada, N., Hasegawa,A., Honda, M. (Coll. Humanities and Sci., Nihon
University), Inoue, K. (Grad. Sch. of Integ. Basic Sci.,
Nihon University), Nagai, H. (Coll. Humanities and Sci.,
Nihon University)
A large amount of radionuclides were discharged from
Fukushima Daiichi Nuclear Power Plant by the accident
caused by huge earthquake. To evaluate the amount ofenvironmental radioactivity, the gamma ray emission
nuclides such as 137Cs, 134Cs and 131I in rainwater, tap waterand aerosols were investigated from the accident at Tokyo.
131
I that has short half-life (8days) should be decay andextinct to a few months. The long life nuclide of 129I would
be used for the proxy of 131I to the future. So we measured
the concentration of 129I in the rainwater and the tap waterby Accelerator Mass Spectrometry.
The concentrations of 137Cs and 134Cs in theatmosphere were dramatically increased to 500 mBq m-3
and exponentially decreased with a environmental half-lifeof 9 days after the accident. The activity ratio of 137Cs/134Cs
in the atmosphere was mostly constant of 1.2. The
concentration of 129I in the rainwater and the tap water were(43-635) x 107 atoms kg-1 and (2.9-76) x 107 atoms kg-1,
respectively. The atomic ratio of 131I/129I was decreased
exponentially with a half-life of 6.4 days and 7.1 days.
1P08
The secular change of radioactivity´sconcentration in airdust from Fukushima Daiichi Plant
at Osaka, Nagoya and Ibaraki.
Cho, S.1, Nakamura, K.1, Shiohara, N.1, Yashuda, Y1.,
Shinohara, A.1, Takahashi, N.1, Saito, T.2, Oda, H.3, Ikeda,
A.4, Kita, K.5, Kasahara, R.5 (1School of Sci., Osaka Univ.,
2
Dept. Administration of Safty & Hygiene, Osaka, Univ.,
3
Center for Chronological Res., Nagoya Univ., 4TechnicalCenter of Nagoya Univ., 5College of Sci., Ibaraki Univ. )The polluted air dust by radioactive waste from
Fukushima No. 1 nuclear power planthave been measured
from March 2011 onward at Osaka (Toyonaka), Aichi

(Nagoya) and Ibaraki (Mito and Hitachi). Radioactivity of131
I, 134Cs, 136Cs and 137Cs were mesured by HPGe J-ray
spectrometer for the 365, 605, 819 and 662 keV J-ray,respectively.
Iodine-131 had been first detected fromMarch 18 in Nagoya, and 134Cs and 137Cs began to beobserved after 10 days.
Concentrations of 131I, 134Cs and137
Cs in the air were in the range of 0 to 14, 0 to 18 and 0 to
20 mBq/m3, respectively, with two peaks in April 6 and 17.
These peaks may be suggested by the existence of highconcentration of polluted air mass which is rotated aroundthe earth.
1P09
Activity measurement of airborne dust in
Osaka Sennan area
Oki, Y., Osada, N., Yamasaki, K., Shibata, S. (Kyoto Univ.)
Radioactive materials released from the accident siteof Fukushima Daiichi Nuclear Power Plant spread far andwide as airborne dust. In this work, the airborne dust wascollected in Sennan area in Osaka, and its radioactivity wasmeasured. The dust was sampled everyday at Kyoto
University Research Reactor Institute in Kumatori-cho,Osaka on a glass fiber air sampling filter using a highvolume air sampler. The activity was measured with Ge
detector systems. The principal radionuclides found on thefilter were 131I, 134Cs and 137Cs.
Their activity
concentrations in air were estimated and their fluctuations
were discussed.
1P10
Environmental radioactivity measurements at
Mikamine, Sendai
Kikunaga, H., Ohtsuki, T., Ishikawa, T., Kashiwagi, S.,
Shibasaki, Y., Suzuki, K., Sugawara, Y., Takahashi, K.,
Takahashi, S., Nagasawa, I., Nanbu, K., Hiraga, M.,
Fujimura, H., Matsuda, K., Muto, T., Miyahara, F., Miyabe,
M., Yamazaki, H. (Research Center Elec. Photon Sci.
Tohoku Univ.)
The Fukushima 1 Nuclear Power Plant suffered major
damage from the 2011 off the Pacific coast of Tohoku
Earthquake and subsequent tsunami on March 11, 2011 andreleasedvariousradionuclides.
Monitoringofenvironmental radioactivity should provide important
information on the behavior of the radionuclides. In thispresentation, the monitoring results on the concentration ofradioactivity in the air and soil and the radiation dose rate
are shown. In addition, the Electron Linear Accelerator at
Research Center for Electron Photon Science, Tohoku
University also suffered damage from the earthquake. The
state and the reconstruction plan of the accelerator will bepresented.
1P11
Pollution by radioactive iodine andradioactive cesium in fruit fields
Ohtsuki, T., Kikunaga, K.(Tohoku Univ.), Izumi,
Y.(Nikkannken Co.), Kirishima, A., Satou, N.(Tohoku
Univ.), Muramatsu, Y., Ohno, T.(Gakusyuin Univ.), Sato, M.,
Abe, M., Abe, K.(Research Institute of Fruit)
A lot of radioactive materials were spread out by theaccident of the Fukushima Daiichi nuclear power station
caused by the tsunami accompanying earthquake in the areaof Tohoku district-Pacific Ocean, in 2011/3/11. In earlystage, short half-life nuclides, such as 132Te, 131I, 136Cs, aswell as 134C, 137Cs were observed in fields. Now 134C and137
Cs which are comparatively long half-life became

dominant observing nuclides. The nuclear power plant
accident brought serious damages in many directions,especially, the influence of the field pollution by these
nuclides is great in the agriculture, and the quick actions andthe measures are needed. The influence of 134C and 137Cs to
the fruit tree were investigated in cooperation with
Fukushima agricultural center, Institute of Fruit Tree
Science. We report several facts of the transfer andtranslocation mechanism of 134C and 137Cs in fruit trees.
1P12
Concentration and size-distribution of
airborne radionuclides at Nagano City after the accident
at the Fukushima I nuclear power plant
Muramatsu, H., Kawasumi, K., Kondo, T. (Fac. of Edu.,
Shinshu Univ.)
Concentrations of radionuclides released from the
Fukushima I nuclear power plant have been measured forsurface air, rain and soil at Nagano City (36º39´N,
138º12´E). By using γ-ray spectrometry of collected
samples we have detected and determined fission productsof 131I, 132Te, 134Cs and 137Cs. Concentrations of relatively
short-lived nuclides, 131I and 132Te, in surface air rapidly
decreased with increasing elapsed time from the accident
mainly due to radioactive decay and dilution.
Concentrations of long-lived nuclides, 134Cs and 137Cs,
in wet precipitation (rain and snow) gradually decreased due
to diffusion and dilution of airborne species in air, and due
to so-called washout every rainfall.
The particle size distribution of radioactive aerosols
has been observed using the Andersen-type classifier
combined with the high volume air sampler. Aerosol
particles were classified and collected on four glass fiber
filters, and on a back-up filter for aerosols smaller than 1.1
Pm in diameter. About 80% of collected activities wasfound in the back-up filter, which means that the majority ofradioactivity would attached to aerosols with the diameters
less than 1.1 Pm. Using three data corresponding toparticle-size ranges of 3.3-7.0, 2.0-3.3 and 1.1-2.0 Pm,
Activity Median Aerodynamic Diameter (AMAD) was
estimated under the assumption that the particle size
distribution of radioactive aerosols in surface air is in a
lognormal and unimodal distribution. Estimated AMADsof 131I-,134Cs- and 137Cs-aerosols were ranging from 0.56 to
0.60 Pm, which were greater than that of 7Be-aerosols ,about 0.2 Pm.
1A01
Surface-ionization of lanthanides for themeasurement of the first ionization potential of Lr
Sato, N.1, Asai, M.1, Tsukada, K. 1, Sato, T. K. 1, Toyoshima,
A. 1, Li, Z. J.1, Ooe, K.1, Kikuchi, T1, Kaneya, Y. 1, Schädel,M. 1,2, Nagame, Y.1, Ichikawa, S.3 (1JAEA, 2GSI, 3RIKEN)
The first ionization potential (IP) of the last actinide,
lawrencium (Lr), is predicted to be lower than those of otheractinides. To determine the IP of Lr based on the surface
ionization comparison technique, we are developing asurface-ionization-type ion-source coupled to a gas-jet
transport system at the Isotope Separator On-Line at the
JAEA tandem accelerator facility. In the present study, wemeasured ionization efficiencies of lanthanides as a functionof ion-source temperature to examine the applicability of
our apparatus to the IP measurement. It was found that theobtained ionization efficiency of each lanthanide element isaffected by an ionization potential as well as a boiling point.

1A02
Determination of redox potential ofmendelevium (Md)Toyoshima, A.1, Li. Z. J.1, Asai, M.1, Sato, N.1, Sato, T. K.1,
Ooe, K.1, Kikuchi, T.1, Kaneya, Y.1, Kitatsuji, Y.1, Tsukada,
K.1, Nagame, Y.1, Schädel, M.1,2, Kasamatsu, Y.3, Kogama,
Y.3, Shinohara, A.3, Haba, H.4, Even, J.5 (1JAEA, 2GSI,
3Osaka Univ. 4RIKEN, 5Universität Mainz)
Redox potential of mendelevium (Md) was
determined with flow electrolytic chromatography.
Mendelevium-255 with a half-life of 27 min was producedin the 248Cm(11B, 4n) reaction at the JAEA tandem
accelerator. Reaction products transported by a KCl/He
gas-jet method were collected on a chemistry apparatus.
After removing KCl with HDEHP column chromatography,
elution behavior of Md in 0.10 M HCl was investigated witha flow electrolytic column apparatus at the applied
potentials between -0.3 and -0.6 V vs. a Ag/AgCl referenceelectrode. At -0.3 V, elution behavior of Md was the same asthat of 250Bk3+, showing that the stable Md3+ was not
reduced to the divalent state. At -0.6 V, elution of Md wasquite similar to that of Sr2+, demonstrating that Md3+ was
successfully reduced to Md2+. From the behavior of Md
against the applied potentials, we evaluated its redox
potential to be -0.40±0.03 V.
1A03
Development of a liquid scintillation detection
system for aqueous chemistry of seaborgium
Komori, Y.1, Kikutani, Y. 1, Yokokita, T. 1, Kino, A. 1,
Kikunaga, H.2, Kasamatsu, Y. 1, Yoshimura, T. 1, Takahashi,
N. 1, Shinohara, A. 1 (1Grad. School of Sci., Osaka Univ.,
2
Research Center for Elec. Photon Sci., Tohoku Univ.)
The purpose of our study is to develop an on-line
liquid scintillation detection system coupled to an
ion-exchange or a liquid-liquid extraction apparatus foraqueous chemistry experiments of element 106, seaborgium.
In this work, we developed a liquid scintillation detector
with α/β discrimination for on-line measurements. Energy
resolution and detection efficiency in α-particle detection
was measured using the nuclide 226Ra and 241Am,
respectively. Events derived from spontaneous fission wereobserved using the nuclide 252Cf. A procedure of the on-line
measurement is as follows: the emulsifier scintillator was
introduced into the cell, and then aqueous solution sample
was injected with mixing by using an electromagnetic stirrer.
Measurement was started after homogeneously mixing of
the solution in the cell. After the measurement, solution in
the cell was drained. This procedure was automated andrepeated. This detection system was applied to on-line
measurement of 213Fr (T1/2 = 34.6 s) which was produced by
209
Bi(16O,4n)221Pa reaction using the AVF cyclotron at the
Research Center for Nuclear Physics.
1A04
High-resolutionalphafine-structure
spectroscopy for studying nuclear structure of heavy
nuclei
Asai, M.1, Haba, H.2, Sato, N.1, Kasamatsu, Y.3, Kaji, D.2,
Morimoto, K.2, Morita, K.2, Shima, Y.4, Shibata, M.4,
Tsukada, K.1, Sato, T.K.1, Toyoshima, A.1, Ishii, T.1,
Nagame, Y.1 (JAEA1, RIKEN2, Osaka Univ.3, Nagoya
Univ.4)We
havedeveloped
high-resolutionalphafine-structure spectroscopy for studying nuclear structure ofshort-lived heavy actinide nuclei. It has been demonstrated
that spin-parities and single-particle configurations of theground state of a parent nucleus as well as excited states in adaughter nucleus can be determined only through themeasured alpha singles spectrum. To achieve a good alphaenergy resolution of ~11 keV, conditions to make a thinalpha source have been optimized. Using this technique, wehave identified proton single-particle configurations of
Lr-255g, 255m, 257, and 259 for the first time.
1B01
A Relationship between Water Purifying
Effect and Structure of Iron Containing Soda-lime
Silicate Glass
Iwanuma, Jun; Kubuki, Shiro; Akiyama, Kazuhiko(Tokyo Metropolitan Univ.), Nishida, Tetsuaki (Kinki
Univ.)
Chemical Oxygen Demand (COD) achievement ratio,
which is an index of the water contamination of closed
water systems like lake or pond, is lower than that of open
water systems like river and ocean, because contaminants
tend to accumulate at the bottom. Current water purifying
methods have problems with cross-contamination bychemicals etc. In this study, a relationship between water
purifying effect and the local structure of iron containing
soda-lime silicate glass (xNCFS glass), prepared byconventional melt-quench method at 1400 oC for an hour,
was investigated by means of COD manganese method(K0102 17), Powder X-ray diffraction, and 57Fe-Mössbauer
spectroscopy. Two paramagnetic doublets due to Fe2+ andFe3+ were observed in Mössbauer spectra of 10 and
30NCFS glass, and only a paramagnetic doublet due to Fe 3+
was confirmed in 50NCFS glass. In the case 50NCFS
glass, the COD value was significantly decreased from 276
to 98.7 mg/L after 3days. On the other hand, in the case 10
and 30NCFS glass, the COD value was significantly
decreased from 236 to 64.5 and from 234 to 67.5 mg/L after
7days, respectively. It is concluded that 50NCFS glass
decreases COD most effectively.
1B02
Electrical Conductivity and Local Structure ofChemically-modified Barium Iron Vanadate Glass
Masuda, H., Kubuki, S., Akiyama, K. (Tokyo
metropolitan Univ.), Nishida, T. (kinki Univ.)
A relationship between local structure and electric
conductivity (V) of manganese substituted NTA glassTM witha composition of 20BaO ･ (70-x)V2O5 ･ 10Fe2O3 ･ xMnO2(xMnNTA) was investigated by means of 57Fe-Mössbauer
spectroscopy, and dc four-probe method.
Mössbauer spectrum of 10MnNTA glass consists of aparamagnetic doublet with the isomer shift (G) and
quadrupole splitting value (') of 0.41 mm s-1 and 0.76 mm
s-1 indicating that Fe atom forms distorted Fe,,,O4 tetrahedra.
A drastic decrease in ' value from 0.76 to 0.49 mm s-1 wasobserved after the isothermal annealing.
A markedincrease in V was observed from (4.7±3.8)×10-7 to(1.4±0.3)×10-2 S cm-1 when 10MnNTA was isothermallyannealed at 500 oC for 1000 min.
An increase in V accompanying decrease in ' value
was also confirmed after the annealing of phosphorous
substituted NTA glassTM with a composition of 20BaO･(70-x)V2O5･10Fe2O3･xP2O5. These results indicate that theincrease in Vvalue is closely related to decrease in ' valueof vanadate glass.

1B03
Mössbauer
spectroscopic
studyof
incorporations of organic molecules into intermolecularvoids in the mixed-valence trinuclear iron(III, III, II)pentafluorobenzoate complex
Sakai, Y.1, Onaka, S.1, Takahashi, M.2, Nakamoto, T.3, Ogiso,
R.1, Takayama, T.1 (1. Daido University,
2. TohoUniversity, 3. Toray Research Center)
The mixed-valence trinuclear iron (III, III, II)carboxylate complexes have received intensive attention
from many chemists in the field of Mössbauer spectroscopy,
in which the valence states of the 3 iron ions are trapped or
detrapped (averaged) depending on various conditions. It
was proved in our previous Mössbauer studies using
pentafluorobenzoate as carboxylate that the valences ofthree iron ions are trapped at room temperature for
FeIII2FeIIO(C6F5COO)6 (C5H5N)3 (abbr. F5) while they are
detrappedatroom
temperaturefor
FeIII2FeIIO(C6F5COO)6(C5H5N)3.CH2Cl2 (abbr. F5.CH2Cl2),
CH2Cl2 being here a solvate molecule in crystalline solid.
Our present study showed that Mössbauer spectra at room
temperature of F5 exposed to vapor of organic compounds,
such as CH3CN, CH2Cl2, and C6H6, were transformed froman iron-valence trapped type to a detrapped type. To thecontrary, such a transformation was not observed for thecase of exposing to C6H5CH(CH3)2 with a relatively large
molecular size.
This finding allows us to presumetentatively that some gaseous organic molecules (M) shouldincorporate into the intermolecular void with a nano-metersize of F5 crystals, subsequently forming the solvate crystal
F5.M.
1B04
Syntheses and Mössbauer spectroscopic studyof mixed-valence hetero-trimetallic pentafluorobenzoate
complexes containing iron ions
OGISO, R.1, ONAKA, S.1, SAKAI, Y.1, TAKAYAMA, T.1,
TAKAHASHI, M.2, NAKAMOTO, T.3 (1. Daido University,
2. Toho University, 3. Toray Research Center)In our previous study, 57Fe-Mössbauer spectra were
measured for mixed-valence trinuclear iron (III, III, II)pentafluorobenzoate
complexes,
FeIII2FeIIO(C6F5COO)6(C5H5N)3.CH2Cl2,where CH2Cl2 is asolvate molecule in crystalline solid.
It was shown that
all iron ions should be in a fully detrapped valence state of+2.7, i.e., an average value of 2Fe3+ and Fe2+, to which one
doublet was assigned at 300 K while the trapped valence
states of Fe3+ and Fe2+ were separately observed at 5 K, andthat the transition temperature from the trapped state to thedetrapped one was estimated to range from 70 to 100 K.
In the preset work, one of Fe3+ ions of the above complex
being
substituted
with
Cr3+,
III
III
II
Cr Fe Fe O(C6F5COO)6(C5H5N)3.CH2Cl2,
wassynthesized as a novel compound. The 57Fe-Mössbauer
spectra were measured at temperatures from 78 K to 300 K,
revealing that Fe3+ and Fe2+ were separately observed in thetrapped valence state at 78K while there was found only one
component at 300 K, ascribable to Fe2.5+ in the detrappedvalence state.
It is the first observation that valence
detrapping between Fe3+ and Fe2+ ions should occur in amixed-valence hetero-trimetallic carboxylate complex.
1B05
Studies on hot atom chemical behavior ofenergetic ions in solids(XXVI) ~ Dependence of impurity

concentration on hydrogen isotope retention in carbon
and oxygen containing boron films
Miura, R.1, Osuo, J.1, Hamada, A.1, Kawasaki,
K.1,Fujishima, T.1, Ashikawa, N.2, Sagara, A.2, Oya, Y.1,
Okuno, K.1 (1Radiosci. Res. Lab. Fac. of Sci., Shizuoka
Univ., 2NIFS.)
Boronization has been considered to be applied as oneof the most effective techniques for first wall conditioningin D-T fusion reactors. Boron is easily bound to impurities
such as carbon and oxygen, and the boron film
contaminated by them impurities will be formed. It isconsidered that tritium will be trapped not only by boron but
also the impurities in the boron film. In the present study,
the boron films contaminated by both of carbon and oxygen
were prepared and the impurity effects of carbon andoxygen on deuterium retention behavior were studied.
The boron films were prepared by the Plasma-assisted
Chemical Vapor Deposition method and then the samples
were removed residual hydrogen by heating up to 1173 K.
Thereafter, deuterium ion (D2+) was implanted into thesample. Before and after the D2+ implantation, the XPS
measurements were carried out. The TDS measurements
were performed from room temperature up to 1173 K.
Three D2 desorption stages were appeared around 550
K, 750K and 900 K in the D2 TDS spectra, attributing to thedesorption processes of deuterium trapped as B-D-B bond,B-D bond and B-O-D and/or B-C-D bonds, respectively.
The amount of C bound to B as C-B bond was increased as
the carbon concentration increased and that of O as freeoxygen was also increased with increasing the oxygen
concentration in boron films, although that as C-B bond forthe 20% carbon-contained boron films was little increased.
These results indicate that hydrogen isotopes are trapped as
B-C-D bond in lower carbon concentration when oxygen
co-exists with carbon in boron films.
1B06
Studies on hot atom chemical behavior ofenergetic ions in solids(XXVII)-Elucidation of deuterium
retention behaviors in only D2+ irradiated tungsten
UCHIMURA, H.1 ,KOBAYASHI, M. 1 ,SUZUKI,
M.1 ,KAWASAKI, K.1 ,MIYAHARA, Y.1 ,ASHIKAWA, N. 2,SAGARA, A. 2,YOSHIDA, N. 3,OYA, Y.
1,OKUNO, K. 1 (1Radiosci. Res. Lab. Fac. of Sci., Shizuoka
Univ., 2NIFS., 3Res. Inst. for App. Mech., Kyushu Univ.)
Tungsten is considered to be used as plasma facing
materials in D-T fusion reactors. Irradiation defects areformed in tungsten when high energy particles escape fromplasma. Especially, elucidation of retention behavior ofhydrogen isotopes including tritium is necessary withrespect to tritium inventory. In this study, D2+ irradiation
was performed as a function of D+ fluencein the range of(0.03-1.8) × 1022 D+ m-2. The deuterium retention behavior
in tungsten was investigated by means of Thermal
Desorption Spectroscopy (TDS) and Glow Discharge –Optical Emission spectroscopy (GD-OES), and irradiation
defects were observed by Transmission Electron
Microscope (TEM).
The D2 TDS spectrum was consisted of 3 deuterium
desorption stages around 400 K, 550 K and 650 K. Thesepeaks were attributed to the desorption indeuterium
adsorbed on the surface and/or trapped by dislocation loop
(Peak 1), that retained in vacancy (Peak 2) and that migrated
toward the bulk (Peak 3), respectively. Above 1.0×1022 D+

m-2, the deuterium retention as Peak 1 was saturated andthat as Peak 3 was increased, indicating that deuterium
would diffuse toward the bulk after almost all the surface
trapping sites were saturated by deuterium. The TEM
observations showed that the density of dislocation loops
was increased as the D+ fluence increased. Increasing theamount of dislocation loops indicated that much morevacancies were intorudced in tungsten. The GD-OES
measurements showed that the D depth profile was shifted
toward the bulk as the D2+ fluence increased. These results
indicated that deuterium was diffused toward the surface bytrapping and detrapping by damages, which induce thehigher desorption temperature of Peak 3. It was revealed
that the peak shift and the amount of D retention have acorrelation to the density of defects.
1B07
Studies on hot atom chemical behavior ofenergetic ions in solids (XXVIII) - Elucidation ofchemical release process for tritium produced in thermal
neutron-irradiated Lithium titanate –TODA, K1., KOBAYASHI, M1., HAMADA, A1.,
MATSUOKA, K1., FUJISHIMA, T1.,
FUJII, T2., YAMANA, H2., OYA, Y1., OKUNO, K1.
(1Radiosci. Res. Lab., Fac. Of Sci., Shizuoka Univ., 2Res.
Reactor Institute, Kyoto Univ.)
In blanket systems for D-T fusion reactors, it will beconsidered that lithium ceramics are introduced to breed
tritium by the reactions of 6Li(n,α)T and 7Li(n,n’α)T.
Li2TiO3 is considered to be used as a solid tritium breeding
material due to its low reactivity and high tritium recovery
performance. In order to realize an effective tritium fuelcycle for fusion reactors, the elucidation of tritium release
behavior is required. Therefore, tritium release processes inneutron-irradiated Li2TiO3 were kinetically elucidated bymeans of Thermal Desorption Spectroscopy (TDS). Li 2TiO3powder purchased from KAKEN Co., Ltd was irradiated bythermal neutrons with the fluence of 3.3 x 10 15 n cm-2 at the
Kyoto University Research Reactor Institute (KURRI). The
TDS measurements were performed with the heating ratesof 5-30 K min-1 in the temperature range of 300-1373 K,
and isothermal heating was also applied in the temperature
range of 500-600 K to clarify tritium desorption dynamics.
It was found that 98 % of tritium was desorbed as HTO andthe rest was desorbed as HT. The desorption stage around800 K of the HTO-TDS spectrum was attributed to thedesorption of tritium retained in the irradiation defects. The
heating spectra were well fitted by a diffusion equation
assumed sphere indicating that the rate-determining step oftritium release is the diffusion of tritium in Li2TiO3. The
tritium release processes are discussed in detail bysimulating the isothermal heating spectrum and calculationof activation energy from heating rate dependence
measurements.
1B08
Studies on hot atom chemical behavior ofenergetic ions in solids (XXIX) –Clarification for
influences of chemical states of stainless steel oxide layer
on retention behaviors of hydrogen isotopesTAGUCHI,T.1, OSUO,J.1, SUZUKI,M.1, MATSUOKA,K.1,
MIYAHARA,Y.1,
MATSUYAMA,M.2,HAYASHI,T.3,
YAMANISHI,T.3, ASAKURA,Y.4, OYA,Y.1, OKUNO,K.1(Radiosci. Res. Lab. Fac. of Sci., Shizuoka Univ. 1,
Hydrogen Isotope Research Center, Univ. of Toyama 2,

JAEA3, NIFS4)
In fusion devices, it is considered that stainless steel(SS316) will be widely used as component materials such asa vacuum vessel, cooling pipes and so on. An oxide layer isformed on the surface of stainless steel and hydrogenisotopes including tritium is trapped and retained in theoxide layer. It is seen that the chemical states of the oxide
layer is controlled by the oxidation temperatures.
Clarification of correlation between chemical states of theoxide layer and tritium retention behavior is important fromthe viewpoint of tritium retention control. In this study,
influences of chemical states of the oxide layer on retention
behavior of hydrogen isotopes were studied.
Following to the pretreatment, the stainless steel
samples were exposed to Ar/O2 gases in order to form theoxide layers at R.T., 473 K or 673 K. Thereafter, thesesamples were exposed to D2 gas at 573 K. The deuterium
desorption behavior was observed by Thermal Desorption
Spectroscopy (TDS) in the temperature range of R.T.-1173
K. The chemical states of the surface oxide layer were
investigated by X-ray photoelectron Spectroscopy (XPS)The TDS results showed that the amounts of D2
desorption increased with increasing the oxidation
temperature, although D2O desorption was independent of
the oxidation temperature. The D2 desorption stages were
found around 600, 700 and 800 K, attributing to the releasesof deuterium adsorbed on the surface, trapped by the oxide
layer and retained in the bulk, respectively. According to the
XPS measurements, the major chemical state of the surface
oxide layer was iron oxides and the deuterium desorption
temperature was consistent with the decomposition
temperature of iron oxides, suggesting that the chemical
states of iron oxide would affect the deuterium retention in
the oxide layer.
1B09
In-beam Mössbauer spectroscopy of 57Mn
implanted into lithium hydride
Nagatomo, T.1, Kobayashi, Y.2, Kubo, M.K.1, Yamada, Y.3,
Mihara, M.4, Sato, W.5, Miyazaki, J.6, Mae, K.1, Sato, S.7,
Kitagawa, A.2 (ICU1, RIKEN2, Tokyo Univ. of Sci.3, Osaka
Univ.4, Kanazawa Univ.5, Nihon Univ.6, NIRS7)
A study of 57Fe in-beam Mössbauer spectroscopyusing 57Mn ion beams provides direct information on exotic
state of unstable nuclear probes and on electronic propertiesof the surrounding materials. Recently, our detection system
was successfully improved to obtain in-beam Mössbauer
spectra with very large S/N ratio using Heavy Ion Medical
Accelerator in Chiba (HIMAC) of NIRS. Binary
compounds of Fe or Mn atom and H atom have not beensynthesized, and a stable ternary compound Mg2FeH6 has
been known. In the present work, we investigated thechemical and physical behaviors of 57Fe arising from 57Mn
in a lithium hydride, which is an ionic solid having a very
simple rock salt type crystal structure. The 57Mn secondary
beam was produced through a nuclear projectile
fragmentation process of the 58Fe beam with a 27mm-thickBe plate as a production target. The LiH polycrystalline
sample, which was purchased from Wako Pure Chemical
Industries, was mounted on a BN heater. The sample
thickness was around 3 mm. The temperature dependence of
Mössbauer spectra of 57Mn/57Fe in LiH was obtained in therange from room temperature to 823 K. The obtained
spectra were fitted with the combination of a singlet andtwo doublets. The singlet peak of which the isomer shift is G
= 0.29(3) mm/s is assigned to an Fe atom surrounded by six
H atoms, which substitutes Li atom in LiH crystal. Because
the difference between the electronegativities of Fe and H iscomparatively small, the covalent bond is considered to beformed. Density functional calculation with cluster models
is in progress to make assignments for the othercomponents.

structure of blue crystals is similar to that of Zn(NCS)2(bpp).
ICP-OES revealed that red crystals have relatively larger
cobalt content, while blue crystals have larger zinc content.
And ICP-OES revealed that the content of iron is relatively
low both in red and blue crystals.
57
Fe Mössbauer spectroscopy revealed that the blue
mixed crystals have a trend to show Fe(II) low-spin state,while red mixed crystals show Fe(II) high-spin state.

1B10
Dilute magnetism and Mössbauer spectra in
Fe and Co co-doped ZrO2
OKABAYASHI, J., NOMURA, K., KONO, S., YAMADA,
Y. (Univ. of Tokyo, Tokyo Univ. of Science)
We investigate the effects of Fe and Co co-doping on
the magnetic and electronic properties of ZrO2 ceramics
prepared by a sol-gel method, and study their dependence
on the annealing temperature. Dilute Fe and Co co-doping
into ZrO2 exhibits ferromagnetic behavior at room
temperature for annealing temperatures above 900 °C,
accompanying the phase transition from tetragonal tomonoclinic structure in ZrO2. The electronic structures arestudied by x-ray absorption spectroscopy and Mössbauer
spectroscopy, which suggest that the Fe3+ and Co2+/Co3+
mixing states are dominant in Fe and Co co-doped ZrO2. In
Mössbauer spectra, as the annealing temperature increases
to 900 °C, sextet peaks appear in the co-doped case, andthese are enhanced at 1000 °C. The appearance of sextet
peaks reveals the magnetic ordering in Fe ions and aninternal magnetic field of 40 T. Broad sextet line shapes andhyperfine fields originate from the formation of
nanoparticles and super-paramagnetic contributions fromCoFe2O4 (Co-ferrite) like compounds. As the internal
magnetic field in bulk CoFe2O4 is about 50 T, the line
shapes can be explained by the size effect in the segregationof the Co-ferrite-based nanoparticles.

1B12
Strong affinity between dilute Al and In
impurities doped in ZnO
Komatsuda, S.1, Sato, W.2, Kawata, S.3, Ohkubo, Y.4 (1Grad.
School Nat. Sci. Tech. Kanazawa Univ., 2Inst. Sci. Eng.,
Kanazawa Univ., 3Fac. Sci., Fukuoka Univ., 4Res. Reactor
Inst. Kyoto Univ.)
The time-differential perturbed angular correlation
method was applied to a study of local fields at the111
Cd(←111In) probe nucleus in Al-doped ZnO. In ourprevious TDPAC studies, we found that local fields at theprobe nucleus in In-doped and Al-doped ZnO are distinctly
different from that for undoped ZnO. Especially for the
Al-doped ZnO, in addition, the doping effect on the111
Cd(←111In) probe is prominent even at as low Al
concentration as 500 ppm.
This experimental result
implies that there is a strong attractive force between Alion(s) and the 111Cd(←111In) probe. By means of the
TDPAC method, in this work, we investigated the dilute
limit of Al concentration at which their strong affinity
between Al and the 111Cd(←111In) probe presumed above
can be observed. We found that in Al-doped ZnO the111
Cd(←111In) probe is perturbed by the local field producedby the doped Al at the Al concentration as dilute as 0.1 ppm.

1B11
Syntheses of Mixed Crystals of Assembled
Iron Complexes Bridged by 1,3-Bis(4-pyridyl)propane
and Their Spin States (Ⅲ)
DOTE, Haruka1, NAKASHIMA, Satoru2. (1 Grad. School
Sci., Hiroshima Univ., 2 N-BARD, Hiroshima Univ.)
Self-assembled coordination polymers containing
transition metal ions and organic bridging ligands haveattracted intensive interests because of their potential
abilities for selective inclusion and transformation of ionsand molecules. In the present study, we discussed thestructure of the mixed crystals of zinc and cobalt ion for theassembled complexes bridged by bpp, and then we
discussed the spin state of the mixed crystals of iron ion
with zinc and cobalt ions for the assembled complexes
bridged by bpp.
Mixed crystals were obtained by diffusion method.
Zinc and cobalt ions were mixed in the synthetic process.
From the solution, red and blue crystals were obtained.
Powder X-ray diffraction pattern showed that the red
crystals are in the 2D interpenetrated structure, and thestructure of blue crystals is similar to that of Zn(NCS)2(bpp).
ICP-OES revealed that red crystals have relatively larger
cobalt content, while blue crystals have larger zinc content.
Iron, zinc, and cobalt ions were mixed in the synthetic
process. From the solution, red and blue crystals wereobtained. Powder X-ray diffraction pattern showed that the
red crystals are in the 2D interpenetrated structure, and the

1B13
Anomalous electric conductivity observed for
In-doped ZnO
Sato, W.1, Komatsuda, S.2, Furumoto, I.3, Nishida, T.3,4,
Ohkubo, Y.5 (1Inst. Sci. Eng., Kanazawa Univ., 2Grad.
School Nat. Sci. Tech., Kanazawa Univ., 3Grad. School
Advanced Sci. Eng., Kinki Univ., 4Fac. Humanity-oriented
Sci. Eng., Kinki Univ., 5Res. Reactor Inst., Kyoto Univ.)
Zinc oxide (ZnO) is an intrinsic n-type semiconductor,
and its conductivity varies with the presence of dilute
impurities. It is hence important to investigate how
impurity ions function in ZnO matrix. In our previous
work, we applied the time-differential perturbed angularcorrelation (TDPAC) method with the 111Cd(←111In) probe
to a study of local fields in 0.5 at.% In-doped ZnO, andfound that the density of conduction electrons at the probesite is lower than that for undoped ZnO. In the present
study, therefore, we have measured electric resistivity of the
In-doped and undoped ZnO samples in order to compare thedensity of conduction electrons in a macroscopic scale.
The resistivity for the 0.5 at.% In-doped ZnO wasthree-to-four orders of magnitude greater than that for the
undoped one, which is inconsistent with general
understanding that donor impurities provide conduction
electrons. The local structure in the vicinity of the probe
in ZnO matrix is discussed based on the resistivity as wellas the electric field gradients at the probe nucleus.
1B14
Electronic Structures and Photophysical
Properties of Nitridotechnetium(V) and Rhenium(V)Complexes Showing Reversible Interconversions

between Five- and Six-coordinate Structures
Ikeda, H.,1 Yoshimura, T.,1 Ito, A.,2 Sakuda, E.,2 Kitamura,N.,2, 3 Takayama, T.,4 Sekine, T.,5 Shinohara, A.1 (Graduate
School of Science, Osaka University,1 Graduate School of
Science, Hokkaido University,2 Graduate School ofChemical Sciences and Engineering, Hokkaido University,3Department of Chemistry, Daido University,4 Center for the
Advancement of Higher Education, Tohoku University 5)
A single chemical imaging agent applicable to both
radio- and optical methods has attracted much attention. In
this circumstance, the fundamental photoluminescent
properties of technetium and rhenium complexes are worth
studying in detail for development of a radio- andphoto-active agent based on a Group 7 element. In this study,
novel five- and six-coordinate technetium(V) andrhenium(V) complexes were synthesized and theirphotoluminescence properties and electronic structures were
investigated. Furthermore, we report the reversible reaction
between five- and six-coordinated complexes.
It is found that the emission peak of six-coordinate
rhenium complex shifted to the shorter wavelength than thatof six-coordinate technetium one. In the case of
five-coordinated structure, the technetium complex showedemission peak at shorter wavelength than rhenium one.
In both of technetium and rhenium complexes, theinterconversion between six-coordinate complex withmethanol and five-coordinate complex was occurred.
Furthermore, in the case of rhenium complex, thesubstitution reactions between the six-coordinate complexes
with methanol and acetone were observed in the solid stateat room temperature. On the other hand, in the case oftechnetium, the five-coordinate complex was obtained fromthe reaction of the methanol coordinate complex in theacetone vapor in the solid state.
1B15
Formation of colloidal 7Be species in thecooling water for magnetic horns at the J-PARC
Neutrino Facility.
BESSHO, K., MATSUMURA, H., TAKAHASHI, A.,
TAKAHASHI, K., HAGIWARA, M., TOYODA, A.,
MASUMOTO, K., MONJUSHIRO, H., OYAMA, Y.,
YAMADA, Y.
At the J-PARC Neutrino Facility, 7Be is induced in thecooling water for magnetic horns by spallation of oxygen inwater molecules. Colloid formation behavior of 7Be in thecooling-water was investigated in relation to theadsorptivity of 7Be on ion-exchange resins. After circulating
the cooling water through the ion-exchange resin units forseveral-ten hours, a part of 7Be remained in the circulatingwater and could not be removed quickly by ion-exchange
resins. Colloidal fraction of 7Be in the water after circulation
through the ion-exchange resin units was found to be 15 to
40 % depending on the beam operations. The colloidal 7Be
species were dissociated into soluble species by addition ofdilute sulfuric acid in water. Adsorptivity of 7Be on
cation-exchange resins also increased in acidic conditions.
These results imply that adsorptivity of colloidal 7Be species
on ion-exchange resins is lower than that of soluble 7Be
species and it can be easily increased by adding dilute
sulfuric acid in circulating water.
1B16
Mineral analysis of some commerciallyavailable Japanese tea leaves and tea infusions byneutron-induced prompt and delayed gamma-ray
analysis
Islam, M.A.1, Ebihara, M.1, Motohashi, J.2 (1Grad. Schoolof Sci. & Eng., Tokyo Metropolitan Univ., 2Quantum BeamSci. Directorate, JAEA)
Tea is one of the most consumed beverages in theworld. In Japan, the consumption of green tea is very highas compared with oolong and red teas. Determination ofmineral contents of tea, especially in tea infusions is very
important to elucidate the amount of the elements intake
during tea consumption. In this study, we aimed todetermine mineral elemental contents before and after
infusion of some commercially available green teas and to
determine percentage released of the elements duringinfusion with boiling water. Six brands of commerciallyavailable tea leaves, representing different regions of Japan,
were purchased from local markets for analysis. Tea leaves
before and after infusions were analyzed by PGA and INAA
at JRR-3 of JAEA. Elemental contents of K, Ca, Mg, Al, S,
Na, Mn, Fe, Zn, Cl, Br, B, La, Sm, Sc and Co were
determined in tea leaves. Boron and S were determined by
PGA. Among the determined elements the major elements
are K, Ca, Mg, Al, S and Mn (concentrations ranged from2.50 % to 500 µg/g). The elemental contents vary in tea
leaves from region to region where tea is cultivated. The
average extraction rates into infusion of some highly soluble
elements like Cl, Br, K, Co, Na, S, Zn, B, Mg and Mn are
93, 80, 71, 60, 49, 39, 36, 16, 14 and 5% in 6 minutes
extraction, respectively. Among these elements Cl, Br and K
are the most soluble elements in the infusion. The highsolubility of Cl, Br and K in tea infusion can be explainedby the fact that these elements are present in plants insoluble forms. The present study suggests that tea infusion
contains a high amount of micronutrients like K, Ca, Na,
Mg and Mn which are essential minerals to human health.
1P13
Development of Si-CdTe detector array for
Nuclear spectroscopy of superheavy nuclidei ②
Takeyama M.1, Kaji D.2, Morimoto K.2, Sumita T.3, Haba
H.2, Tokanai F.1 (1Yamagata University, 2Nishina Center,
RIKEN, 3Tokyo University of Science)
Nuclear spectroscopy for understanding of nuclear
shell-structure is one of the hot topics in nuclear physic on
the superheavy nuclei. Near future, the nuclear
spectroscopic study at the focal plane of GARIS orGARIS-II in RIKEN will be started. We pay attention to the
CdTe detector as J(X)-ray detector instead of the Ge
detector, because the radiation background due to neutron
and J (X)-ray is high at RILAC in RIKEN. Thus, wedeveloped a new Si-CdTe detector array with large
active-area. Additionaly, optimum condition for operatingeach detector was studied. In this symposium, we will reportabout a possibility of the Si-CdTe detector array for α(e)-J
spectroscopy of superheavy nuclei.
1P14
Preparation of 99Mo and 181W radiotracers
and their application for anion-exchange studies
Wada, A., Oura, Y., Haba, H., Kanaya, J. (Tokyo
Metropolitan Univ., RIKEN)In chemical studies of element 106, Sg, it is important
to compare chemical properties of Sg with those of its
lighter homologues, Mo and W. The chemical procedures toprepare no-carrier-added radiotracers, of 99Mo and 181W,

were investigated in this work. 99Mo was obtained as a
fission product of a 252Cf source and 181W was produced by
the 181Ta(p, n) 181W reaction at the RIKEN AVF cyclotron.
They were purified by anion-exchange method. In addition,
an excitation function for the 181Ta(p, n) 181W reaction wasdetermined and compared with those in the literature andthe theoretical calculations by TALYS code.
1P15
Study on cation-exchange kinetics of Zr and
Hf as homologues of 104Rf with H2SO4 solutions
Ikarashi, S.1, Sueki, K.1, Li, Z. J.2, Tsukada, K.2, Nagame,Y.2 (1Pure & Appl. Sci., Univ. Tsukuba, 2Advanced Sci. Res.
Center., JAEA)
It was reported that the cation-exchange
chromatographic behavior of Zr and Hf as homologues of
elements 104, Rf, in H2SO4 solutions was not consistent
with the distribution coefficients obtained by the batch
experiment. This study was investigated on theion-exchange kinetics which were obtained from diffusion
processes of Zr and Hf on the cation-exchange resin in
H2SO4 solutions, and was discussed about the quantitativityof chromatography. We obtained the fractional attainment ofequilibrium, U(t), of the carrier-free radiotracers 88Zr and175
Hf adsorbed on the cation-exchange resin(MCI GEL CK
series, H+ form) after a contact time, t, and then variations ofU(t) values in the H2SO4 solutions as a function of contact
time within 300 seconds by the batch experiment. We
discussed the dependence of functions of U(t) on
temperatures, concentrations of HSO4- and radii of resins. It
is result that the good agreement between experimental data
and theoretical curves which the film diffusion control is therate-determining step in the present ion-exchange process.
1P16
Production of radioisotopes for commercial
distribution
KANAYA, J., KAMBARA, T., HABA, H., TAKAHASHI,
K., (RIKEN Nishina Center)
YAMADA,T., WAKITANI, Y., YAMAMOTO, S. (Japan
Radioisotope Association)
In October 2007, we started a charged distribution of
the purified radioisotopes (RIs) of 65Zn and 109Cd to thegeneral public with the collaboration of Japan Radioisotope
Association. In December 2009, we added 88Y into a list of
RIs available for the charged distribution. 65Zn, 109Cd, and88
Y were produced in the 65Cu(p,n)65Zn, 109Ag(p,n)109Cd,
and 88Sr(p,n)88Y reactions, respectively, with a 14-MeV
proton beam (~20 μA) from the RIKEN AVF cyclotron.
After the irradiation, 65Zn was chemically separated fromthe target material by an anion-exchange method in ahydrochloric acid system. 109Cd was separated in the same
method as 65Zn after a AgCl precipitation. 88Y was separated
from the target material by a reversed-phase
chromatography with the Eichrom Ln resin in a nitric acidsystem. The production yields, chemical impurities andspecific activities of those purified RIs were evaluated usinga Ge detector and an ICP-MS. The production yields of 65Zn
and 109Cd were 0.24 and 0.080 MBq μA–1 h–1, respectively,
and the specific activities were ≥ 242.8 and ≥ 94.3 MBq
μg–1, respectively.
1P17
Extraction of Mo and W in oxidation states +5
and +6 with Aliquat 336
Yokokita, T.1, Ooe, K.2, Komori, Y.1, Kikutani, Y.1, Kino, A.1,

Kasamatsu, Y.1, Yoshimura, T.1, Takahashi, N.1, Shinohara,
A.1 (1Grad. School of Sci., Osaka Univ., 2Advanced Science
Research Center, JAEA)
We are planning to study a redox behavior of element
106, seaborgium (Sg) based on the comparison of the
behavior with those of molybdenum (Mo) and tungsten (W).
In this work, we studied solvent extraction behaviors ofMo(V), Mo(VI), and W(VI) with Aliquat 336 fromhydrochloric acid (HCl). Mo(VI) and Mo(V) solutions wereprepared by dissolving Na2[MoO4]·2H2O and [MoCl5] inHCl, respectively. Another Mo(V) solution were also
prepared by reducing Mo(VI) solutions electrochemically.
Carrier-free radiotracer 181W(T1/2=121.2 d) was used in theextraction of W(VI). 181W was produced via 181Ta (p, n)reaction at the AVF cyclotron in RCNP of Osaka University.
W was dissolved in HCl after the separation from Ta target.
The aqueous phase containing Mo(V), Mo(VI) or W(VI)
was mixed with equal volume of the Aliquat 336 inchloroform, and the mixture was shaken for 20-30 min at
about 25 °C. Subsequently, phase separation was made bycentrifuging the mixture. After the extraction, the amountsof Mo and W were determined by UV-visible spectrometryfor Mo and X-ray measurement for W, and the distribution
ratios were obtained. We are going to report the variation of
the distribution ratios of Mo and W against the HCl andAliquat 336 concentrations.
1P18
Excitation function for fusion reaction of avery deformed nucleus of lutetium-175
Toda, K., Kaiya, H., Yokoyama, A. (Kanazawa Univ. ) ,Takahashi, N. , Kasamatsu, Y. (Osaka Univ.) , Ooe, K.
(JAEA)We have studied the effect of the degree of
deformation in the fusion reaction of a deformed
nucleus-spherical nucleus. In this study, we measured crosssections of the fusion reaction of Lu + O. The Lu-175
nucleus is known to be more deformed than Tm and Tb,
which were used in our previous studies. The excitation
functions in the 175Lu+16O system were determined toevaluate its systematics together with the results of previous
studies. The evaporation residue cross sections were
measured by using a stack technique and a gas-jet techniquein the projectile energy range of 100 to 150 MeV. By
gamma-ray spectrometry, 186-188Au, 186-188Pt and 184-187Ir weredetected and the cross sections were obtained from theactivities. The cross sections were compared with thetheoretical values calculated by ALICE code and HIVAP
code. The measured excitation functions were found to
exhibit a shape broader than calculation. The mechanism ofinterest is currently under discussion.
1P19
Reexamination of the procedure preparing forreversed-phase extraction chromatography resin for
speciation of rutherfordium
Takeda, Y., Shigeyoshi, Y., Yokoyama, A., Toyoshima, A.
(Kanazawa Univ., JAEA)
For the purpose of speciation of rutherfordium, asuperheavy element, in solution, we aim to obtainliquid-liquid extraction data of Rf by means ofreversed-phase chromatography with stationary phase
containing chelate extractant, TTA. TTA extracts
quadrivalent metal ions preferentially, and, that is, we canobtain a specific complex formation constant of Rf. We had

used kel-F particles as substrate of TTA, the diameter ofwhich is around 0.5 mm and not of suitable size formicro-columns (1.6 mm×7 mm). In this study, we used
CHP20Y of 30 μm in diameter with a newly devised
procedure of preparing for TTA resin. It was experimentallyfound that the TTA resin thus prepared has the extraction
ability which responds to the property of liquid-liquid
extraction.
1P20
Development of Gas-jet coupled Surface Ion
Source of ISOL for Measurement of First Ionization
Potential of Lr
Sato, T. K., Sato, N., Asai, M., Tsukada, K., Toyoshima, A.,
Kaneya, Y., Ichikawa, S., Nagame, Y., Schädel, M. (JAEA,
Ibaraki Univ., RIKEN)
The first ionization potentials of the heavy elementswith atomic number Z > 100 have never measured owing to
the low production rates and short half-lives of the nuclides.
In order to determine the first IP of the heaviest actinide
element, lawrencium (Lr, Z = 103), by the surface ionizationcomparison method, we have developed a surface ionization
ion source coupled with a gas-jet transport system for an
ISOL (Isotope Separator On-Line) at the JAEA tandem
accelerator facility. From the results of our fundamental
experiments by using short-lived lanthanide isotopes, wehave decided to apply some improvements to the apparatus
to increase surface temperature of the ion source and reducethe cold spots, and achieve stable operation for a long beamtime.
In the conference, we will mention the current statusof the ion source development and the improvements.
1P21
Basic study of gas-phase chemistry using
RIKEN GARIS/gas-jet system.
Kojima, T.1, Murayama, H.1, Murakami, M.1, Goto, S.2,
Haba, H.3, Kaji, D.3, Morimoto, K.3, Kudou, Y.3, Morita, K.3,
Kikunaga, H.4, Sato, T. K.5, Tsukada, K.5, Kudo, H.6 (1Grad.
School of Sci. and Technol., Niigata Univ., 2Center for
Instrumental Anal., Niigata Univ., 3Nishina Center, RIKEN,
4
Tohoku Univ., 5Advanced Sci. Res. Center, JAEA, 6Fac. ofSci., Niigata Univ.)
A gas-phase chemical separation method which
examines behavior of adsorption and desorption of volatilecompounds on a column surface is one of the most usefultechniques to investigate chemical properties of superheavy
elements. An adsorption enthalpy is usually derived by thismethod using Monte Carlo simulation. However, if two
isomers which have different half-lives each other can bemeasured, it is expected that the adsorption enthalpy isderived without the parameters of experimental conditions.
Recently, it was reported that 261Rf has the isomer with 1.9-s
half-life. Therefore, if the gas-phase chemistry for 261Rf with
68-s half-life and that isomer can be performed, newanalysis can be applied. The aim of this work is to performthe experiment of the gas-phase chemistry of the nuclides
with short half-lives using a gas-filled recoil ion separator(GARIS) coupled with a gas-jet transport system.
As the test experiment, the gas-phase chemistry of Hf
isotopes was performed. Hf isotopes were produced innat
Gd(18O, xn) reaction at the RIKEN linear accelerator
facility. The reaction products separated from the beam andby-products by GARIS were introduced to the gas-jet
chamber. The products were attached on a carbon cluster inthe gas-jet chamber, and were transported to the apparatusof the isothermal gas chromatography by a flow of a He
carrier gas. The transported products were then collected onquartz wool plugged in a quartz tube, and formed volatilechloride compounds by a reactive gas of HCl. The volatilecompounds of Hf passing through the isothermal column
were attached to KCl aerosol particles, and werere-transported to the collection site for gama-ray
spectrometry. The pressure in the gas-jet chamber has to belower than 60 kPa because the film to separate from GARIS
is not so strong. On the other hand, the carbon cluster does
not generate at the pressure of lower than 120 kPa. To solve
this problem the carbon cluster generator and the gas-jet
chamber were connected by a Teflon capillary (1.0 mm i.d.
× 6, 10, 16 m length). The transport efficiency wasdetermined as the function of the length of the capillary andthe flow rate of He carrier gas.
1P22
Extraction of Zr and Hf in TIOA/HCl systemfor online batch extraction of Rf with the resin
A. Kino, Y. Komori, Y. Kikutani, T. Yokokita, Y. Kasamatsu,
N. Takahashi, T. Yoshimura,and A. Shinohara (Osaka Univ.)
We are interested in the chloride complex formation ofrutherfordium (Rf, Z = 104). By the past pioneeringresearches, basic chemical properties of Rf have beenstudied by the chromatographic method. In many cases,
however, achievement of chemical equilibria was notconfirmed. Purpose of the present study is to obtain theextraction data of Rf in equilibrium and to clarify theproperties in complex formation of Rf. In this work, we
performed liquid-liquid extractions and solid-liquid
extractions of Zr and Hf, the homologues of Rf, in thetriisooctylamine (TIOA)/HCl system by the batch method.
We obtained the distribution ratios (D) and distribution
coefficients (Kd) of Zr and Hf and the dependence of thevalues on the shaking time. Moreover, we examined thedependences of the D values and the Kd values on TIOA
concentration and HCl concentration. Based on the present
results, we propose suitable experimental conditions for the
extraction of Rf.
1P23
Mössbauer absorption anomaly of gamma
radiation via nuclear level anticrossing in FePSe3 single
crystal and powder sample
Muramatsu, H. 1, Nakajo, S.2, Mochizuki, S.1, Horinouchi,
S.1, Suzuki, H.1, Nagata, K.2, and Nakagami, K.2 (1Fac. ofEdu., Shinshu Univ., 2Grad. School of Edu., Shinshu Univ.)
By using FeCO3 and FePSe3 single-crystal absorbers,
we have already reported a proof-of-principle experiment,
demonstrating electromagnetically induced transparency(EIT) with gamma radiation for the Mössbauer effect using
the level-crossing technique. In order to clarify whether
FePSe3 can be an appropriate absorber for EIT experiments
or not, an extensive study was carried out using powder
samples of FePSe3. A single crystal of FePSe3 wassynthesized by solid phase reaction in the vacuum-shielded
tube (Vycol glass tube) including the mixture of
stoichiometric amounts of Fe, P, Se at 840℃ for about 1
month. The powder sample of FePSe3 was made bygrinding the single crystal thus synthesized.
From a series of Mössbauer measurements for FePSe3
at various temperatures, we observed that at around 30K thestates of |I=3/2, m=-3/2〉and |I=3/2, m=1/2〉cross and are
mixed, and found an obvious deficit in Mössbauer
absorption at colliding peaks. In the Mössbauer spectrum
taken with the powder sample, the absorption line that
corresponds to mg=1/2 l me=1/2 transition was observed to
be not a singlet but a doublet. So we conclusively
considered that when two nuclear levels cross and are mixed,
two newly generated eigenstates repelling each other could
be observed experimentally under a certain situation.
1P24
Analysis of properties of hydrothermal
synthesized kimzeyite by Mössbauer spectroscopy
KAMIJYO, R., SAITO, T. (Osaka Univ.), KAWASE, M.
(Nagahama Inst. Bio.),
YAMAKAWA, J. (Okayama Univ.)
Kimzeyitehas
thecomposition,Ca3(Zr,Ti)2(Si,Al,FeIII)3O12, and belongs togarnet groups mineral. Garnet minerals generally have thestable structure and hardly exchange elements in them withenvironment. Kimzeyite also shows the long term stabilityof its structure like other garnet minerals, and is expected asa stabilizer in stratum disposal of the radioactive waste. It
should clarify the mechanism of a long term stability toapply kimzeyite as stabilizer.
Kimzeyite samples with various Al/[Al+Fe] ratio werehydrothermal synthesized. And their structure and thestate of Fe in them were analyzed by X-ray powder
diffraction (XRD) and mössbauer spectroscopy.
Mössbauer spectroscopy showed that Fe occupied theZr site as well as original Fe site with increase of
Al/[Al+Fe] ratio. XRD showed that the lattice constants ofsamples were not change with increase of Al/[Al+Fe] ratio.
The obtained results suggest that the change of Fe occupied
site relaxes a distortion of kimzeyite lattice.
1P25
Iron-57 Mössbauer spectra of iron-porphyrin
complexes in frozen solution state.
Takahashi, M., Ikezaki, A., Nakamura, M. (Toho Univ.)
A Mössbauer cell for the frozen solution
measurements is newly designed. The cell, made of SUS303,
has a effective size of 11 mm in diameter and 5 mm inlength for J-ray transmission. A 50 Pm Al foil for thewindow is sealed with indium wire. Iron-57 Mössbauer
spectroscopy is used for the titration of [Fe(TMP·)(ClO 4)2]
toluene solution with NH4F.methanol solution at 193 K.
Three Fe(III) species are observed in the starting[Fe(TMP·)(ClO4)2] solution. New Fe(III) species, which is
assigned to [Fe(TMP·)F(MeOH)] or [Fe(TMP·)F(ClO4)]
appears after the addition of one equivalent NH4F. The
spectrum are changed finally to that of solo species assigned
to [Fe(TMP·)F2] after the addition of two equivalent NH4F.
The present experiments indicate clearly that the
one-electron oxidation species formulated as [Fe(TMP)F2]
is the Fe(III) complex of porphyrin radical cation.
1P26
Hyperfine fields of perovskite manganite
La0.7Ca0.3Mn1-xFexO3(0.2≦x ≦ 1)
measuredbyMössbauer spectroscopy
MINAMI, D.1, SUZUKI, T.1, KOMATSUDA, S.1,
KUBOTA, T.2, SATO, W.3(1Grad. School Nat. Sci. Tech., Kanazawa Univ., 2Fac. Sci.
Kanazawa Univ., 3Inst. Sci. Eng., Kanazawa Univ.)
Perovskite manganese oxides (AMnO3) are known to

exhibit the effect of colossal magnetoresistance (CMR), a
phenomenon that electrical resistivity undergoes a drasticchange as large as five to six orders of magnitude by themagnetic transition. Because of this unique physicalproperty, much attention has been given to these oxides
aiming at wide industrial applications. In order to realize
practical use of these compounds, it is of importance toobtain information on local fields in the material as well as
macroscopic quantities such as resistivity and magnetization.
From this point of view, we have applied Mössbauer
spectroscopy
to
a
study
of
a
perovskite
La0.7Ca0.3Mn1-xFexO3(0.2 ≦ x ≦ 1).
Powder
La0.7Ca0.3Mn1-xFexO3(0.2 ≦ x ≦ 1) was synthesized by aconventional solid-state reaction in air and Mössbauer
measurements were performed at room temperature. Fe
concentration dependence was observed in the Mössbauer
spectra; while the spectra for 20% and 40% Fe-doped
samples can be fitted by assuming a doublet component,
coexistence of a sextet component was observed in the
spectra for 60%, 80%, and 100% Fe-doped samples. These
results suggest that the room-temperature magnetism of thesamples changes depending on the Fe concentration.
1P27
Effect of radiation irradiation on local fields
in ZnO
Togimitsu, T.1, Komatsuda, S.1, Hirose, K.2, Ohtsuki, T.2,
Sato, W.3 (1Grad. School Nat. Sci. Tech., Kanazawa Univ.,
2
Res. Center Electron Photon Sci., 3Inst. Sci. Eng.,
Kanazawa Univ.)
Zinc Oxide (ZnO) is a material strongly expected for
application as a semiconductor. When semiconductors are
doped with impurities, their conductivity varies dependingon the doping methods, type and density of the impurities.
To control the conductivity of semiconductors, it isnecessary to understand the sites and functions of the
impurities in ZnO at an atomic scale. In our previous study,
local fields in polycrystalline ZnO doped with 0.5 at. %indium (In) were measured by means of the time-differential
perturbed angular correlation (TDPAC) method with the111
Cd (← 111In) probe. As a result, we observed spectral
differences from the undoped samples: for example, themagnitude of electric field gradients (EFG) at the probesites. In general, when impurities are introduced intomaterials, lattice defects are formed. In this work, we aimed
to investigate if such defects have correlation with thevariation of local fields in the vicinity of the probe in ZnO.
For this purpose, we obtained TDPAC spectra forpolycrystalline ZnO samples doped with the 111Cd (←111In)
probe, which were irradiated with electrons andbremsstrahlung radiations in order to form lattice defects.
For the spectra of the irradiated samples, comparedwith the unirradiated, the change of the electric quadrupole
frequency was not observed but the attenuation of spectral
amplitude was. The attenuated amplitude, which recovered
during the measurement at 1000 K, is explained as
broadening of the frequency distribution. As a result, weinfer that the radiation irradiation made disorder in the
crystal structure causing the frequency distribution.
1P28
Observation of hyperfine fields at impurity Fe
sites in ZnOSuzuki, T.1, Ohtsuki, T.2, Kasamatsu, Y.3, Takahashi, N.3,
Sato, W.4 (1Grad. School Nat. Sci.Tech., Kanazawa Univ.,

2Res. Center Electron Photon Sci., 3Grad. School Sci.,
Osaka Univ., 4Inst. Sci. Eng., Kanazawa. Univ.)
Zinc oxide (ZnO), one of the most promising
semiconductors, is expected to show room-temperature
ferromagnetism by doping dilute magnetic metal. It isreported that lattice defects take an important role inshowing the magnetism; however, the origin of themagnetism is still in controversy. In the present work, we
prepared Fe-doped ZnO by sintering a mixture of ZnO
powder and iron nitrate. The sample was irradiated withbremsstrahlung radiations and electrons, or with an 16O
beam to investigate the magnetic properties before and after
the irradiation by Mössbauer spectroscopy.
In theMössbauer spectra for all the samples irradiated withbremsstrahlung, a magnetic component was not observed.
However, the value of QS became smaller by the irradiationof bremsstrahlung radiations for the sample doped with 2
at.% Fe. In the presentation, we discuss the Fe content
dependence and the effect of the irradiations based on the
Mössbauer parameters.
1P29
Molecular effects of the muon transfer process
in the mixture solution of cyclohexane and carbon
tetrachloride.
FUJIHARA, K.,1 NINOMIYA, K.,2 KUBO, K.,3
KASAMATSU, Y.,1 KAWAMURA, N.,4 NAGATOMO, T.,3
MIYAKE, Y.,4 MIURA, T.,4 SHINOHARA, A.1(Osaka
University.1, JAEA.2, International Crist Chan University.3,
KEK,4.)
Inthe
negativemuon
captureonthehydrogen-containing molecule, the muonic hydrogen atoms
become free from the chemical bond, and transfer the muon
to other heavier atoms. The purpose of the present study is
to obtain information on the molecular effect in the transfer.
In this work, the measurement of muonic X-ray spectrum
was performed for the mixed C6H6+CCl4 or C6H12+CCl4
solutions with various mixing ratios. Muon irradiation was
performed in the D2 muon beam line of J-PARC-MUSE.
Aluminum sample holder filled with a sample solution was
set in the gas chamber filled with helium gas. Two
germanium detectors were set on both sides of the chamber
for the muonic X-ray measurement. We analyzed muonic
X-ray intensity of carbon and chlorine for these samples.
Obtained intensity value of each transition was normalizedμ C(2-1) or μ Cl(3-2) intensity value. Here, (2-1)
represents muonic transition from the state with theprinciple quantum number n=2 to n=1. We compared theexperimental values of relative muonic X-ray intensities
with those obtained by the cascade calculation to discuss themolecular effect.
3P01
Measurement of 10Be with JAEA-AMS-TONO
Saito-Kokubu, Y. 1, Matsubara, A. 1, Nishizawa, A. 2,
Ohwaki, Y. 2, Nishio, T. 2, Ishimaru, T. 1, Matsuzaki, H. 3
(JAEA 1, Pesco Corp., Ltd. 2, Univ. Tokyo 3)
The JAEA-AMS-TONO system has developed
10
Be-AMS for geochronological studies to estimate
exposure age of basement rocks and environmental sciencestudy. System condition for 10Be-AMS was optimized andtest measurements using several standard samples andunknown samples were carried out in order to assess theaccuracy of the measurements.
A gas ionization detector with a built-in gas absorbercell was installed to prevent 10B from interfering with
detection of 10Be. The gas absorber cell was composed byHavar foil and nitrogen gas in which pressure was
optimized to prevent 10Be efficiently. Two standard samples
with known 10Be/Be ratios supplied from the University ofCalifornia, Berkeley were used to check our system
performance. The results of the standard samples were
almost corresponding to the certified values. Moreover ice
core samples collected from the Dome Fuji station, earthen
Antarctica were measured. The results were as the samelevel as those measured by MALT, Univ Tokyo.
3P02
Installation of Auto sample changer for thePrompt Gamma–ray Activation Analysis instrument at
the JRR-3M, JAEA.
HATSUKAWA, Y., OSAWA, T., (JAEA)
Auto sample changer using the Selective Compliance
Assembly Robot Arm was installed to the Prompt
Gamma-ray Activation Analysis instruments at the JRR-3M.
The auto sample changer has 20 sample holders. Controlof the Robot arm and MCA for gamma-ray measurements,
opening and shutting of upper door of measurement
chamber and the neutron shielding shutter of beam line, arecontrolled by the LabVIEW program.
3P03
Biodistribution of Gadolinium-based contrast
agent, and concentration of trace elements in normal
and nephrectomized rats
WASHIYAMA, K. 1, HATTORI, C. 1, NAGAOKA, M. 3,
TAKAMIYA, K. 3, AMANO, R. 1 (1 Sch. of Health Sciences,
Kanazawa Univ., 2 Grad. Sch. of Med Science, Kanazawa
Univ., 3Research Reactor Institute, Kyoto Univ.)
We measured distribution of Gd and concentration ofsome minerals in selected tissue of two type rats by using
neutron activation analysis. One is normal, and the other ispartially nephrectomized, which is used as pseudo renal
impairment model.
The biodistribution of gadolinium 2-d afteradministration could be determined by 153Gd (T1/2 = 240.4 d).
The kidney showed high Gd retention behavior due tonormal process of excretion of Gd. Skeletal Gd distributionof model rats was significantly higher than that of normal
rats. All of three nephrectomized rats showed high Gd
retention in each tissue compared to normal rats.
The concentration of minerals and halogens such as
Na, Cl, K, Mn, Ca, Fe, Zn, and Br could be determined here.
Among them, zinc had been considered to have re-levanceto unchelated Gd (free Gd2+ ion). Concentration of zinc infemur of model rats was higher than that of normal rats.
3P04
Highly-precise radiocarbon measurements
using the Compact-AMS system at Paleo Labo Co., Ltd.
Ozaki, H., Itoh, S., Niu, E., Hirota, M., Lomtatidze, Z.,
Jorjoliani I., Yamagata, H., Kobayashi, K., Fujine, H. (Paleo
Labo Co., Ltd.)
Paleo Labo Co., Ltd., installed a compact accelerator
mass spectrometer (AMS) system in 2004 and some
improvements have been carried out until now. Few
thousand samples are measured every year and more than
15,000 samples have been measured so far.
In order to investigate the performance of our compact
AMS system, we usually measure several evaluation
standards distributed by IAEA. The precision of eachmeasurements of IAEA C6, C5 and C1 were around 0.1～
0.3%, 0.3～0.5% and 2～7%, respectively and seem to be
fairly good. Our procedure blank calculated from themeasurements of IAEA C1 was 0.147 ± 0.034 pMC
corresponding to 52,395 year BP as radiocarbon age. The
average and standard deviation of reputable measurementsof IAEA C6 and C5 were 150.21±0.28 pMC and 23.10±
0.14 pMC, respectively. For C5, our result agrees withinformation value from IAEA. On the contrary, the result of
C6 was slightly lower than the information value. However,many researchers suggest that the information value of C6from IAEA is high. Our result of IAEA C6 agrees with thevalue reported by Xu et al. (2010), 150.16±0.02pMC. It’s
certified that our radiocarbon measurements have fairly
good precision and accuracy.
In this paper, we will also present some examples ofoutcomes by the highly precise radiocarbon measurements
performed by Paleo Labo Co., Ltd..
3P05
Elimination of 131I and 137Cs in rainwater from
Fukushima Daiichi Accident
Ohta, T.1, 2, Mahara, Y. 2, Fujiwara, K. 2, Fukutani, S. 2,
Kubota, T. 2, Mizuochi, Y.3, Yoshinaga, H. 2, Takamiya, K. 2
(1 Hokkaido Univ., 2 KUR, Sumiko Resources Exploration
and Development Co. Ltd.)
Behavior of 131I, 134Cs, and 137Cs in environment,
released from the Fukushima Daiichi plant were
investigated. Most of the 134Cs and 137Cs from rainwater
were trapped by the surface soil and sand to a depth of 1 cm,
whereas only about 30% of the 131I was collected by thesurface soil. The 131I in the rainwater was in the anion
exchangeable form, and all of it could be collected by anion
exchangeable mechanisms, whereas 30% of the 131I that had
passed through the soil could not be trapped by the anion
exchange resin, suggesting that the chemical form of this
30% was in a changeable, organic-bound form. The 131I,
134
Cs, and 137Cs that were absorbed on soil were difficult tobe dissolved into water. As the half-life of 131I is short and137
Cs is strongly adsorbed on the surface soil and sand, theseradionuclides would be unlikely to reach the groundwater
before completely decaying; contamination of groundwaterwith 131I and 137Cs supplied from rainwater to the surface
soil is therefore exceedingly unlikely.
3P06
Imaging technique for detection of leaf
surface contaminations with fission fragments
Furuta E. (Ochanomizu Univ.)
Fission fragments by the Fukushima daiichi
catastrophe were scattered over a large area. Between Tokyoand Fukushima, leaves were gathered up from March toJune and measured their radioactivities by HPGe.
Radionuclides of 129mTc, 131I, 134Cs and 137Cs were rightly
detected. Also the leaf surface contaminations were shownas images by imaging technique which detected beta- andgamma-rays exposure. The clear images were gotten within
24 h exposure though a normal leaf image needs at least one
week exposure in a shield box. The total PSL values ofleaves depend on their activities of sampling points, so theimaging technique is able to use for detection of the spreadof fission fragments and the relative concentration. Also therain effect to leaves could be shown by imaging techniquewhen leaves were washed in running water. The imaging
technique is easy and useful for the nuclear catastrophe.

3P07
Observation of Atmospheric Radioactive Lead
Isotopes at Kawasaki, Japan
Koike, Y.1, Kurihara, Y.1, Takahashi, M.2, Sato, J.1 (Meiji
Univ.1, Central Research Institute of Electric Power
Industry2)
Atmospheric concentrations of radioactive leadisotopes were observed with aerosol sample intermittently
during April to July 2011 at Kawasaki. Spectral lines from210
Pb, 212Pb, 214Pb, 208Tl, 7Be, 131I, 134Cs and 137Cs are
identified in the spectrum of aerosol sample.
The
concentrations of 210Pb and 212Pb at Kawasaki ranged from0.30 to 0.65 mBq/m3 and from 0.9 to 3.1 mBq/m3,
respectively. These concentration levels are similar to apast values observed at Kawasaki.
Observations ofatmospheric 131I, 134Cs and 137Cs are estimated to be
responsible to the transportation of 131I, 134Cs and 137Cs
originating from the Fukushima nuclear accident.
3P08
Studies on temporal change in depth profilesof the Rn concentrations in natural water columns
Yamada, N., Maeda, E., Uesugi, M., Sato, W., Yokoyama,A., Nakanishi, T. (Kanazawa Univ.)
The Rn concentrations are measured in atmosphere
and water in many places on the earth. In order to determine
the radon data in water sample, special attention should begiven to the radon loss from the sample. In this study,laboratory experiments by using spring water have been
performed for the purpose. We have measured the water
depth profile of residual Rn for water depth of 1 m withelapsed days and water temperatures. The results show that
total residual Rn in water decreases exponentially in thetime scale of days and the radon decreases more rapidly as
the water temperature decreases. And we analyzed theresults with a mass balance model with diffusion parameters.
The calculation data are in good agreement with themesuements.
3P09
Leaching experiments of radionuclides frommonazite
Horiuchi, K., Minowa, H., Yoshizawa, Y. (The Jikei
University School of Medicine)
Many environmental radioactive nuclides are
dissolved from the crust by chemical reactions with theirsurrounding materials. If this mechanism can be understood
accurately, various applications would be expanded. In thisexperiment, the radionuclides were leached from a monazite
using the organic acid. The 100 meshes monazite from
Malaysia was used as the experimental sample. 20ml of
0.1% citric acid and 5g of the monazite were reacted at 40℃.
The leached radioactivity was measured with the liquid
scintillation counter LSC-6100 (Aloka). Although theexistence of 232Th and 224Ra in the leachate was admitted,
the existence of other radionuclides was not confirmed
clearly. Gamma-ray spectrometry of the leachate from thesame monazite has been reported the existence of 212Pb and212
Bi that indicates the existence of 220Rn.
3P10
Analysis of Radionuclides from Fukushima
Nuclear Power Plant Accident in Machida and theSurrounding Area
ENDO, K., NAKAMURA, K., TSUCHIDA, T.,
MATSUOKA, K., HONDA, C., TSUKADA, M. (Showa
Pharm Univ.)

The radioactivity in surface soil at Kanagawa, Tokyo,
Chiba and the surrounding area have been measured during
the period from March to July 2011 after the accident ofFukushima Daiichi Nuclear Power Plant arising from the
Tohoku earthquake and tsunami. The soil samples weredried at 97℃ for 20-24h, and weighted. The J-ray spectra
were measured with a high-purity germanium
semiconductor detector equipped with a multichannel
analyzer. The radioactivity level of 137Cs was found to be afew Bq/kg to one hundred in 15 samples with the average of
43 Bq/kg on April 1 as the compassion date, and that of134
Cs to be nearly the same range (0.5-142 Bq/kg) with theaverage of 49 Bq/kg. The radioactivity level of 131I was
20-60 Bq/kg at lower limit and several hundred Bq/kg at
upper limit, and found to be higher than that of the cesium
isotopes. The radioactivity ratio of 134Cs/137Cs was found tobe 0.9-1.2 for all the samples, while that of 13II/137Cs was
likely to be characteristic for the sampling area.

reactions. Limestone is desired to be used for exposure
dating and/or determine of denudation rates by cosmogenic
36
Cl in calcite for the study of development of karst
landforms.
In the present study, limestone sample were collectedfrom 0 to 3 m depths below surface at two outcrops in
Akiyoshi karst, Yamaguchi, SW Japan. Concentration ofcosmogenic 36Cl was measured by AMS (Accelerator Mass
Spectrometry) at University of Tsukuba. Chemicalcomponent of the limestone was quantified by prompt γ ray
analysis (PGA) at Japan Atomic Energy Agency. Production
rates of 36Cl via 40Ca spallation and neutron capture by 35Cl
were then calculated from the PGA results.
The 36Cl activity decreases exponentially withincreasing depth. Denudation rates of the land surface were
calculated using the scaled 36Cl production rates by aninverse analysis. The denudation seems to have increased
through the Last Glacial to Holocene climate transition.

3P11
Distributions of radionuclides 129I and 137Cs insoils before nuclear accident
KITAGAWA, J. 1,2, SUEKI, K. 1,2, SASA, K. 1,2,
TAKAHASHI, T. 2, KINOSHITA, N. 3, MATSUSHI, Y . 4,
MATSUZAKI, H. 5
(1Pure & Appl. Sci., Univ. Tsukuba, 2Appl. Accel. Div., Univ.
Tsukuba, 3Institute of Technology,
Shimizu Corporation, 4DPRI, Kyoto Univ., 5School Eng.,
Univ. Tokyo)
129
I (half-life: 1.57×107 yr) and 137Cs (half-life: 30.17yr) are produced both naturally and through human nuclear
activities. The majority of these nuclides will be
accumulated in surface soils or ocean by global fallout. 129I
is important long-lived radionuclide used as estimation of131
I abundance. We determined radioactive concentration ofthese nuclides to investigate the radioactive damage before
and after nuclear accident at the Fukushima No.1 nuclear
power plant. The study aims to report 129I and 137Cs
activities in Fukushima soils before nuclear accident.
Isotopic ratios of 129I/I were determined by accelerator mass
spectrometry (AMS) and 137Cs concentration were measured
by an HP-Ge detector. Samples were collected from 18
points at Fukushima prefecture. We report the distribution of
long-lived radionuclides in surface soils (0~10 cm) at all
points and 1 meter depth profile at four points. Radioactive
concentration of surface soils are 0.16 ~ 0.65 (mBq/ kg) for
129
I and 12.60 ~ 44.40 (Bq/ kg) for 137Cs. These results are
standard value by comparison with previous data in Japan.

3P13
Radioactive nuclides in soil at northern
Ibaraki prefecture from Fukushima Daiichi Nuclear
Power Plant.
1,2
Kaneya, Y., 2Sato, T.K., 2Asai, M., 2Tsukada, K.,
2
Toyoshima, A., 2Sato, N., 2Ooe, K., 2Miyamoto, Y., 2Yasuda,K., 2Ninomiya, K., 2Matsuda, M., 2Mitsuoka, S., 3Ishiyama,H., 2Nagame, Y. (1Ibaraki Univ., 2JAEA, 3KEK)
We have measured radioactivities in soils
contaminated by the severe accident of Fukushima Daiichi
Nuclear Power Plant. The soil samples were taken at the 83
points distributed around the north area of Ibaraki prefecture.
Radioactivities in the soils were measured by gamma-ray
spectrometry, and distributions of 131I and 134,137Cs in thisarea were clarified. The highest radioactivity of 130 kBq/m2
of 137Cs was observed at the boundary among Tochigi,
Fukushima, and Ibaraki prefecture, while it was about 3
kBq/m2 at the center of Ibaraki.

3P12
Depth profile of in situ cosmogenic 36Cl inlimestone under ground level: for the reconstruction ofdenudation rates
Nishimura, T. (Univ of Tsukuba), Matsushi, Y. (Kyoto Univ),
Sueki, K., Sasa, K.,
Takahashi, T.,Kinishita, N., Amano, T., Kitagawa, J.,
Kurosumi, K. (Univ of Tsukuba)
Calcite is a main target mineral that accumulates
cosmogenic 36Cl (half-life:3.01×105 yr). The main 36Cl
production mechanism near the ground surface is spallationof 40Ca. While production of 36Cl under the several meters
depth is mainly due to cosmic ray muon. The muogenic
reactions are direct negative muon capture by Ca: 40Ca (P－,D) 36Cl, and capture by 35Cl of secondary neutrons produced
via muon capture and muon-induced photodisintegration

3P14
Correction of sum-coincidence on Ge
detectors using nuclide mixed activity standard volume
sourceHamajima, Y. (Kanazawa Univ.)
In the gamma-ray spectrometry of the cascade gamma
emitting nuclides using a Ge detector, the coincidence sum
effect must be always corrected, even at low count rate. As
affected by the scattered radiation, and because it depends
on Ge detector, shielding material, and also measured
sample, this correction must be measured in each case.
Correction method has been reported in many ways. In thelaboratory without RI controlled area, the reported
correction methods may not be applied, because usual
gamma-ray source is only commercially available for themixed activity standard volume source. I have examined thecorrection method of the coincidence sum effect, using thisusual standard source.
3P16
Solvent extraction of Bk and Md into HDEHP
from HNO3 solution
Kogama, Y.1, Kasamatsu, Y.1, Takayama, R.1, Kikunaga, H.2,
Toyoshima, A.3, Tsukada, K.3, Asai, M.3, Sato, T. K.3, Li, Z.3,
Sato, N.3, Kikuchi, T.3, Kaneya, Y.3, Nagame, Y.3, Ooe, K.3,
Komori, Y.1, Yoshimura, T.1, Takahashi, N.1, Shinohara, A.1(1Grad. School of Sci., Osaka Univ., 2Research Center for
Elec. Photon Sci., Tohoku Univ., 3Advanced Sci. Research

Center, Japan Atomic Energy Agency.)
Whereas the chemical research on heavy actinides
An(III) is difficult to be performed, it is very important tosystematically study the chemical properties of An(III) andto compare these properties with those of lanthanides
Ln(III) in order to discuss the properties of 4f and 5f
elements. Previously, we systematically studied theextraction behaviors of Ln(III) as well as those of 95Am,
96Cm, 98Cf, 99Es, and 100Fm into HDEHP. In this work, we
produced 97Bk and 101Md by using a powerful accelerator of
JAEA and investigated the extraction behaviors of Bk and
Md in the HDEHP/HNO3 system. Distribution ratios in theextractions were determined as a function of theconcentration of HDEHP. From the distribution ratios,
extraction constants, Kex, of Bk and Md were evaluated.
Tetrad effects were clearly observed in the Kex vs. atomic
number plots for An(III) and Ln(III).
3P17
Determination of trace elements and changeof proteins in testers of zinc deficient mice
Tanaka, H.1, Shimoyama, H.1, Ikeda, Y.2, Akiba, S.2, Yanaga,
M.2 (Graduate School of Science, Shizuoka University1,
Faculty of Science, Shizuoka University 2)
Zinc is one of the most important essential traceelements. Zinc deficiency leads to skin injury, alopecia,
growth retardation, loss of senses and so on. Synthesis of
testosterone and spermatogenesis in testes are also affectedby zinc deficiency. Eight weeks old male mice of ICR strain
were divided into three groups. The first is Zn-def. groupfed with Zn-def. diet, the second is control group fed with
control diet, and the third group is fed with control diet for aweek after one week treatment with Zn-def diet. After two
weeks experimental period, their testes were removed andevery four testes of each group were together homogenized
in a Tris buffer. Then, cytosol fractions were separated fromhomogenates by centrifugal separation method. SDS-PAGE
and two-dimensional electrophoresis were carried out.
When the position and the number of the protein spots in gel
after two-dimensional electrophoresis were compared withthose ones, several differences were found between threegroups.
3P18
Analysis of Radio-mineral from Togo mine,
Katamo, Yurihama, Tohaku, Tottori prefecture, Japan
Kawase, M., Fujiwara, Y., Mizobuchi, Y. (Nagahama Inst.
Bio.) Yamakawa, J. (Okayama Univ.), Saito, T. (Osaka
Univ.)
It was considered that the beta-uranophane wascontained in the sample from Togo mine, Katamo,
Yurihama, Tohaku, Tottori prefecture, Japan. The sample
was collected from inside of the mine in 1961, andyellowish powder-like crystals in sample maintained still
highly radioactive.
To identify the mineral species, X-ray
powder diffraction (XRD) and a gamma-ray spectrum were
measured.
The XRD pattern suggested that the beta-uranophane
was contained in the mine. Gamma-ray spectrum showedthat the elements of the 238U decay series were included inthis mine. These results showed the existence of thebeta-uranophane. The crystal structure of the sample
should be investigated for further characterization of thebeta-uranophane from this mine.

3P19
Seasonal variations of 226Ra, 228Ra, and 228Th
activities in surface water from the East China Sea
M. Inoue, M.1, Yoshida, K.1, Minakawa, M.2, Kiyomoto, Y.3,
Kofuji, H.4, Nagao, S.1, Hamajima, Y.1, Yamamoto, M.1(LLRL, Kanazawa Univ. 1, National Research Institute ofFisheries Science2, Seikai National Fisheries ResearchInstitute3, Japan Marine Science Foundation4)
A total of 50 surface water samples were collected in
the East China Sea (ECS), and seasonal and lateralvariations of 226Ra, 228Ra, and 228Th activities were
examined by applying low-background J-spectrometry. The
228
Ra and 228Th activities (and 228Ra/226Ra and 228Th/228Ra
ratios) on the surface exhibited notable seasonal and lateralvariations (228Ra/226Ra = 0.2-3.4; 228Th/228Ra = 0.1-0.4).
Using the 228Ra activity and salinity, fractions of theKuroshio, shelf, and Yangtze River waters on the surface of
ECS are estimated. On the other hand, the 228Th/228Ra ratioon surface reflects seasonal and lateral variation of particle
flux.
3P20
Investigation on Transport Behavior of River
Suspended
Solidsin
KuzuryuRiver
Basinusing210Pbex,137Cs,7Be as tracers
Kanamori Masaki, Seiya Nagao, Shinya Ochiai, Masayoshi
Yamamoto(Kanazawa Univ LLRL)
Introduction
In the material movement from continental areas tothe coastal ocean, the most is transported through the river.
The ratio of the material that adsorbs the particle and istransported is very high though the density in the riverinewater of the suspended particle is very low. Therefore, thematerial movement from continental areas to the coastal
ocean can be understood by doing a qualitative analysis ofriver suspended solids. However, the research example inJapan is absolutely few from few of the amount of thesuspended solids, and a qualitative research in thecatchment scales is hardly done. In this research, it was tried
to examine , 210Pbex,137Cs and 7Be as a tracers in order toevaluate the material movement in Kuzuryu river basin
located in Fukui Prefecture .
Sample and method
Stream water about 120L is gathered in each of one
point in Kuzuryu river main stream and Hino river that is
the tributary of Kuzuryu river, and only the suspended
solids were collected by using continuous centrifugal
method. After Freeze-drying and homogenizing,210Pbex ,7Be
and 137Cs were measured by gamma-ray spectrometry with agermanium semiconductor detector.
Result and discussion
The correlation between flow rate and theconcentration of the suspended solids was greatly different
in Kuzuryu river main stream and Hino river, and differencein the responses of the suspended solids to the flow rate
between Kuzuryu river and Hino river were observed to becaused by the river characteristics. Both Kuzuryu riverand Hino river, the specific activity of 210Pbex showed theincreasing tendency with an increase in the concentration of
the suspended solids, and the specific activity of 137Cs
becomes a constant value regardless of increase in theconcentration of the suspended solids. As for the specificactivity of 7Be, a big difference is seen in between tworivers moreover, it has decreased in Hino river contrary to
an increase of the concentration of the suspended solids

though it increased with an increase in the concentration of
the suspended solids in Kuzuryu river. It was clarified thatthe concentration of the suspended solids and the specificactivities of three nuclides changed from these in relation to
the watershed environment, the supply route of water, andthe feature of the outflow process etc.
3P21
Radium isotopes in high saline groundwater
T. Takada, M. Yamamoto, S. Nagao, J. Tomita (Kanazawa
Univ. LLRL), S. Tamamura (Horonobe Research Institutefor the Subsurface Environment), J. Zhang (Toyama Univ.),
F. Akita (Hokkaido Research Organization)
Introduction
Up to now, Ra isotopes in groundwater have been
researched. In Japan, high concentration of 226Ra is found in
the Arima Spa (6.2Bq/kg) etc. On the other hand, highconcentration of 226Ra that exceeds 100Bq/kg is found fromhigh saline groundwater in foreign countries. Digging up
large depth became possible in Japan, it comes to obtain hot
water of high salinity in coastal region, and it is used as a
hot spring in recent years. We found comparatively highconcentration of 226Ra in high salinity obtained from thecoastal region in Ishikawa, Toyama, and Niigata by ourprevious work, and have been discussing that origin.
However, as there had to be a lot of uncertain points, weneed to study the matter further. Then, the relation between
the salinity and the concentration of 226Ra is examined forthe hot springs in the west of Hokkaido where a lot of highsaline groundwater is situated. And we experimented inadsorption of Ra to the mineral.
Methods
The water samples were gathered from near the source.
U,Ra isotopes were separated by Fe,Ba coprecipitation
and were measured by α and γ spectrometry. And thedissolved ions, the ratio of isotopes and the pH4 alkalinity
were measured by using the chromatograph, the mass
spectrometer and the titration of 0.1M sulfuric acid. U,Ra
isotopes of the digging core sample (Kamoenai Spa.) were
measured.
The sorption experiment of Ra to the mineral went bybatch treatment. The mineral samples(0.01g, 0.1g, 1.0g)
were added to NaCl solution(0.001M, 0.01M, 0.1M, 0.5M,
1.0M 30mL), and the pH was adjusted with the hydrochloric
acid to 5.0~5.5. 226Ra was added, and the mineral sample
was stirred for two days. The centrifuge and the filtration
were done after it had stirred it and measured by γ
spectrometry.
Results
As results of the dissolved ions and the ratio of
isotopes, it was guessed that the water samples originated in
the mixture of the rain water and the seawater or the fossil
seawater. The concentration of 226Ra and 228Ra were
10~5097mBq/kg, 15~7700mBq/kg, and the value of highest
5097mBq/kg was obtained in the hot spring of Kamoenai.
228
Ra/226Ra radioactivity ratio of this hot spring was 1.46
and that ratio of the digging core was 1.32. The salinity andthe concentration of 226Ra were correlated. As result ofexperimented in adsorption of Ra to the mineral, thecoefficient of partition grew whatever minerals were used.
No contradictionto the result in the field was obtained.
3P22 Estimation on transport of riverine suspended
solids in Satoyama area using 137Cs and 210Pbex asgeochemical tracers
TOKUNARI, T. 1, SUZUKI, T. 1, OCHIAI, S. 2, NAGAO, S.
2, YAMAMOTO, Y. 2
(1Grad. School of Sci., Kanazawa Univ., 2Low Level
Radioactivity Lab., Kanazawa Univ.)
Investigation of sediment transport in river systems isimportant to make protection of food production andsediment disaster. In this study, riverine suspended solids(SS) have collected in the Kumaki River, which runs
through abandoned Satoyama area in Noto Peninsula. To
estimate the main source of SS, surface soil samples werealso collected from managed and unmanaged forest, andpaddy field. The samples were analyzed for 137Cs and 210Pbex
by gamma spectrometry. The low 137Cs /210Pbex activity
ratios are found in surface samples of abandoned paddy rice
field associated with accumulation of 210Pbex relative to137
Cs. The low ratio of 137Cs /210Pbex is also found in surface
soil samples of unmanaged forest because heavy rain erodes
surface soil. The river bottom sediments show relatively low
137
Cs /210Pbex activity ratio in the watershed area that runs
through unmanaged forest, paddy rice field, and abandoned
paddy rice field. These results indicate that, in the Kumaki
basin, particle transport processes are mainly controlled bysurface soil erosion from the forest area and paddy field by
washout of heavy rain.
3P23
Vapor emission behavior from Li2+xTiO3+yMizuuchi, R. (Kanazawa Univ.), Hara, M. (Toyama Univ.),
Matsuyama, M. (Toyama Univ.), Oya, Y. (Shizuoka Univ.),
Okuno, K. (Shizuoka Univ.)
Li2+xTiO3+y are promised to the tritium breeding
material in fusion reactor. To understand the gas evolution
behavior, the themogravimetric(TG) analysis were carriedout. We prepared dampen and dried Li2+xTiO3+y. The
samples were heated up, and TG measurements were
performed to find out vapor emission behavior. It wasobserved that H2O emitted from ambient temperature to 250
oC and CO2 emitted at about 600 oC and more. Weightlosses were observed respectively.
3A01
Observed radioactive materials in rain water
after accident of the Fukushima Daiichi Nuclear Power
StationYasuda, K., Miyamoto, Y., Magara, M., Kimura, T. (JAEA)On March 11, 2011, Fukushima Daiichi Nuclear
Power Station had been damaged by massive earthquake
and huge tsunami, named as “The 2011 earthquake off the
Pacific coast of Tohoku”. A lot of radioactive materials werereleased from the power station into the environment. In
order to observe radioactive materials and those fluctuations,rain water was measured by using gamma-ray spectrometer.
134
Cs, 136Cs, 137Cs, 131I, 132I, 133I, 129mTe, 132Te, 133Xe, 140Ba
and 140La were observed in the collected rain water at
Tokai-mura which is located at 100-km in the south of thepower station. The release of radioactive materials from thepower station into the atmosphere has not been observed
since April 11 as a result of measuring the fluctuation forradioactivity of 137Cs that is a typical radioactive material.
3A02
Extraction of Radioactive Cesium from Tea
LeavesYano, Y.1,2, Higaki, S.2, Hirota, M.3, Nomura, K.3, Kubo, M.
K.1 (1ICU, 2RIC, Univ. of Tokyo, 3Sch. Eng. Univ. of Tokyo)

Radioactive contamination of foodstuffs attributed to the
Fukushima Daiichi nuclear disaster has become a social
problem. This study investigated the extraction ofradioactive cesium from the contaminated leaves to the tea.
The green tea was brewed twice reusing the same leaves tostudy the difference in extraction of cesium between thefirst and second brew. Moreover, the extraction of cesium
was studied in correlation to brewing time. The
concentration of radioactive cesium was determined withgamma spectrometry, and the concentration of caffeine wasdetermined with absorption spectrometry. About 40% of
cesium was extracted from leaves in the first brew, andabout 80% was extracted in the second brew. The extractionof cesium increased over time, and it reached about 80%
after 10 minutes brew. The ratio of radioactive cesium tocaffeine decreased linearly over time. This study revealed
that the extraction of cesium was higher for the second brew,
and a rapid increase in extraction was seen as the tea wasbrewed for 6 minutes and more. Therefore, the first brew ofgreen tea, which was brewed within 5 minutes, contained
the least extraction of radioactive cesium from thecontaminated leaves.

contaminated tap water
Tagami, K., Uchida, S. (Natl. Inst. Radiol. Sci.)
Following the Fukushima Daiichi Nuclear Power
Plant accident, iodine-131 concentrations in tap water
higher than 100 Bq L-1 were reported by several local
governments in the Kanto Plain in March 2011. To remove
iodine-131 from tap water, five methods were tested in thisstudy, that is, (1) boiling, (2) adding charcoals from oak orbamboo, (3) activated charcoals, (4) water purifiers, and (5)reverse osmosis (RO) treatments. Boiling was shown to be
not effective in removing iodine-131 from tap water; indeed
even higher concentrations may result from theliquid-volume reduction accompanying this process. Adding
charcoals and activated charcoal treatment could not remove
iodine-131, because no reduction of iodine-131 wasobserved in tap water samples after these treatments. Only
limited effect was found with water purifiers with first
several portions; no effect was expected with further water
treatment. On the other hand, the RO showed highiodine-131 removal percentage of more than 95%, although
the method needs about 5-10 L water to obtain 1 L of RO
treated water.

3A03
Depth distributions of radionuclides in soils
from the Fukushima nuclear accident
Satou, Y. (Grad. School of Life and Env. Sci., Univ. of
Tsukuba), Sueki, K., Kitagawa, J., Ikarashi, S., Sasa,
K.(Grad. School of Pure and Appl. Sci., Univ. of Tsukuba),
We have measured depth distributions ofradionuclides in characteristic soils from Fukushima No.1
nuclear plant accidents. Some researchers already reported
depth deposit and profiling in soils for long half life
radionuclides environmentally released from previous
nuclear accidents or nuclear bomb tests. However shorthalf-life radionuclides have not been really investigated,because they disappear relatively quickly. In this study, we
collected four characteristic soils at Fukushima Pref. Soilcore samples were frozen at -20 degree Celsius and sliced
them into pieces 1cm layer. The separated samples were
inspected by γ-ray spectrometry (131 I, 129mTe, 137Cs, and 134Cs) with an HP-Ge detector. 131I, 137Cs and 134Cs show thesame tendency with respect to density deposit. The behaviorof radionuclides in soils depends on particle size
distribution of soil.

3A06
Research on hydrogen availability of soil
water and atmospheric water during photosynthesis byplantsIchikawa, R., Momoshima, N., Sugihara, S. (Kyushu Univ.)
This
research
isaimed toclarify tritiumtransformation
from
water
to
hydrocarbon
during photosynthesis in plants. Plants have two kinds ofpathways of leaf water used in photosynthesis; soil waterand atmospheric water vapor. No difference is considered atpresent as far as hydrogen fixation during photosynthesis
depending on the water pathways. If the water pathway
results in difference in amounts of hydrogen fixation ofplants, evaluation of hydrogen fixation depending on thewater pathway is important and necessary for tritium
assessment
aroundnuclearfacilities
becausetritium released to atmosphere is usual and the tritium will
be taken up easier to leaf through stoma than through soil
water. We examined tritium availability during
photosynthesis for two water pathways using D 2O ashydrogen tracer. We report the result of soil water
availability.

3A04
Variations in radioactivity of radiocesium inriver waters from Fukushima Prefecture
Nagao, S., Kanamori, M., Ochiai, S., Inoue, M., Hamashima,Y., Yamamoto, M. (Kanazawa Univ.)
The radioactive concentrations of 134Cs and 137Cs inriver waters from Fukushima Prefecture were measured.
Samplings were carried out at 4-6 stations from Abukuma,
Uta, Nitta, Natsui and Same Rivers in May 20, July 12-13
and July 27 in 2011. The radioactivity of 137Cs in the riverwaters collected in May 20 ranges from 0.23 to 4.17 Bq/L.
These values are three orders higher than that of Kuji andTone River waters before the Fukushima Accident. The
percentage of particulate forms of 137Cs is 86% for the
upstream Abukuma sample. The activity ratio of 134Cs/137Cs
is almost constant, 0.90-0.91 and agree with that of aerosoland surface soil samples in Fukushima area.

3A07
Distribution of U-236 in the Japan Sea
SAKAGUCHI, A.1, KADOKURA, A1., STEIER, P.2,
SHIZUMA, K. 1, TAKAHASHI, Y. 1, YAMAMOTO, M3.
(Hiroshima Univ. 1, Univ. of Vienna2, Kanazawa Univ.
LLRL3)The Japan Sea is a marginal sea of western North
Pacific Ocean which is enclosed by four straits. Since theJapan Sea has similar physical process with open ocean, theJapan Sea is called "Miniature ocean" and which is aappropriate analog for the oceanic research. Recently, runupof water temperature, decrease of dissolved oxygen in deep
water and escalation of marine pollution have been reported
in the Japan Sea. These are urgent Pan-Japan Sea issues,
which may be related to global environment change in near
future. To take countermeasure to these problems, it isimportant to investigate the detail of seawater dynamics in
the Japan Sea. In our previous studies, 236U has been foundin surface soil as an globalfallout nuclide from nuclear test,

3A05

Tests of some methods to remove I-131 from

which suggests that 236U will be a useful tracer forgeochemical dynamics. In sea water, 236U appears to bedissolved as UO2(CO3)34- after introducing to surface
seawater. Thus, 236U has a possibility to be a useful tracer
for ocean circulation. In this study, we attempted to get the
information on 236U and another globalfallout radionuclides,
137
Cs, in the Japan Sea to investigate seawater dynamics.
Sea water (7 sites), suspended solid (SS) (7 sites), andsediment (5 sites) samples were collected from the Japan
Sea in the summer of 2010 (KH10-02 research cruise). 236U
in water, SS and sediments were measured with accelerator
mass spectrometry (AMS) after appropriate sample
treatment and purification for those nuclides by using anion
exchanging resin. 137Cs in seawater was purified andcollected with ammonium molybdophosphate precipitation(AMP), and measured J-ray with Ge -semiconductor
detector. We could measure 236U in the small amount of sea
water samples and obtained depth profile of 236U. The
profile of 236U is nearly same as that of 137Cs in watercolumn. The detail results will be presented in ourpresentation.
3A08
Study of cosmic-ray intensity fluctuations
around 11 ka by 36Cl measurements in the Antarctic ice
core
Kurosumi, K., Sasa, K., Sueki, K., Takahashi, T., Kinoshita,N., (Univ. of Tsukuba) Matsushi, Y., (Kyoto Univ.) Tosaki,Y., (AIST) Horiuchi, K., (Hirosaki Univ.) Matsuzaki, H.,(Tokyo Univ.) Motoyama, H. (NIPR)
36
Cl is a cosmogenic nuclide (half-life:301 kyr)produced mainly by a reaction of 40Ar (p, nα) 36Cl in theupper atmosphere. The cosmogenic nuclide falls on the
Earth’s surface at a rate depending on the nuclide
production rates and hence reflecting the cosmic rayintensity. Therefore we can reconstruct fluctuations ofcosmic ray intensity, by determining the past 36Cl
depositional flux. Such fluctuations of cosmic ray intensity
may indicate paleo solar activity and/or variations in the
Earth’s geomagnetic field.
This paper presents the results of cosmogenic 36Cl
measurements during 10.54-12.00 ka in the ice core drilled
at the Dome Fuji station, Antarctica (39°42′12" E ，
77°19′01" S, 3810 m above sea level). 36Cl in the ice wasmeasured with the Accelerator Mass Spectrometry (AMS)
system on the 12UD Pelletron tandem accelerator at the
University of Tsukuba. A peak of 36Cl depositional flux (3.0
× 104 atoms cm-2 yr-1) was observed around 11 ka,
corresponding to the 10Be enhancement found in the sameice core. The variation in 36Cl flux shows similarfluctuations in 10Be flux reported previously. 10Be /36Cl isestimated to be nearly constant at about 10.2 during
11.21-11.37 ka for the data obtained here.
3A09
Temporal variation of Pu isotope in watercolumns of the equatorial Pacific Ocean
Yamada, M. 1, Zheng, J. 2 (1 Hirosaki Univ., 2 Natl. Inst.
Radiol.Sci.)
The 239+240Pu concentrations and 240Pu/239Pu atom
ratios were determined by alpha spectrometry anddouble-focusing SF-ICP-MS for seawater samples from thetwo stations (AQ-7 and AQ-13) in the equatorial Pacific
Ocean. The 239+240Pu concentration at AQ-7 was 1.8
mBq/m3 in the surface water and increased with depth

reaching 14.4 mBq/m3 at 600 m depth, then decreased withdepth to 2.7 mBq/m3 at the bottom layer. The 240Pu/239Pu
atom ratios in the water columns from the equatorial Pacific
Ocean were higher than the mean global fallout ratio of 0.18.
The relative percent of the inventory of close-in fallout fromthe Pacific Proving Grounds were 25 % in the surface layerand 55 % at the 3000 m depth. The decreasing rate of
239+240
Pu over the depth interval 0 – 1000 m were estimatedto be 0.89 Bq/m2/yr based on the difference in the 239+240Pu
inventories between AQ-7 and GEOSECS-246.
3A10
Evaluation of hypoxia in Tokyo bay bychemical states of elements in the sediments
OKOSHI, T., SHOZUGAWA, K., MATSUO, M. (Graduate
School of Arts and Sciences, The University of Tokyo)
Hypoxia is observed in every summer season in Tokyobay. Though it is estimated that dredged areas in the bay arecause of hypoxia, specific relation between hypoxia anddredged area is not revealed. In order to know hypoxia for
past, we attempted to evaluate redox condition by chemical
state of S, Fe and Mn in the sediments. Core samples werecollected at dredged area from 2009 to 2011. Concentrationand chemical states of elements were measured by neutron
activation analysis and X-ray absorption fine structure(XAFS). From vertical distribution and chemical state of S,
it was indicated the 2009 is more reductive than 2010. On
the other hand, chemical states of Fe and Mn did not varyover the core samples. Therefore, in order to trace change ofchemical species about Fe and Mn, the sediments of which
oxidation-reduction potential was changed were measured
by XAFS. Because difference of valence was not observed
from the results, we estimated that chemical form of Fe and
Mn at the time when these elements were deposited wasconserved.
3B01
Measurement of excitation functions ofrutherfordium isotopes in 248Cm + 18O reaction
Murakami, M.1, Goto, S.2, Murayama, H.1, Kojima, T.1, Kaji,
D.3, Morimoto, K.3, Haba, H.3, Sumita, T.3,4, Sakai, R.3,5,
Kudou, Y.3,Yoneda, A.3, Morita, K.3, Kikunaga, H.6,
Kasamatsu, Y.7, Sato, T. K.8, Kudo, H9. (1Grad. School of
Sci. and Technol., Niigata Univ., 2Center for Instrumental
Anal., Niigata Univ., 3Nishina Center, RIKEN, 4Tokyo Univ.
of Sci., 5Saitama Univ., 6Tohoku Univ., 7Osaka Univ.,
8
Advanced Sci. Res. Center, JAEA, 9Fac. of Sci., Niigata
Univ.)In the chemistry experiment of Rf, 261Rf (261aRf; T1/2
68 s, ED
8.28 MeV) has been used because it has arelatively long half-life and decays by emission of alphaparticle. In recent years, it is said that there exists a
short-lived isomer in 261Rf which is the descendant of 277Cn
and 269Hs. It is reported that 262Rf has also isomer having
similar half-life. In this work, to confirm that the nuclide
with a few second half-life is truly 261Rf, the measurementof excitation function of Rf isotopes which are produced by248
Cm + 18O reaction was performed.
Experiments were performed at RIKEN linear
accelerator facility using a gas-filled recoil ion separator(GARIS). Rf isotopes were produced in 248Cm(18O,xn)
reaction. A 248Cm2O3 target having a thickness of 230 Pg
cm1 was irradiated by 18O beams of energies of 88.2, 90.2,
94.8, and 101.3 MeV at the middle of the target. The decayof produced nuclides separated from the beam and theby-products by GARIS were measured at GARIS focal
plane using Si detector box. The beam ON/OFF method wasapplied, that is, activities accumulated in beam ON period
were measured in beam OFF period.
The alpha spectra were observed under very low
background conditions. The 261aRf and the daughter nuclides,
257
No, were clearly observed in each beam energy.
Normalizing the cross section of 261aRf as 13 nb, theconstructed excitation function of 261aRf was in agreementwith that reported previously. It is found that the excitation
functions of spontaneous fissioning nuclides, 261bRf and
262
Rf, were different with each other.
3B02
Fissionfragment
anisotropy
inheavy-ion-induced fission of actinides II
Nishinaka, I.1, Nishio, K.1, Tanikawa, M.2, Makii, H.1,
Wakabayashi, Y.1, Mitsuoka, S.1, Yokoyama, A3. (1ASRC,
JAEA, 2Fac. of Sci., The Univ. of Tokyo, 3Inst. Sci. Eng.,
Kanazawa Univ.)
We have measured fission fragment angular
distributions in the reaction of 16O + 238U (D=0.874) at the
JAEA tandem accelerator to study the effects of entrance
channel mass asymmetry D (At-Ap)/(At+Ap) on fission
fragment anisotropy, At and Ap being respective mass
numbers of target and projectile nuclei. The 16O beamenergies of Elab=89.1-100.8 were set to provide the same
excitation energies of the compound nucleus in the reactionsof 22Ne + 232Th (D=0.827) and 12C + 242Pu (D=0.906) in theprevious work, producing the same compound nucleus
254
Fm. It becomes clear that the fission fragment
anisotropies for 16O + 238U with D=0.874 are similar to thosefor 12C + 242Pu with D=0.906 but smaller than those for 22Ne
+ 232Th with D=0.827. The Businaro-Gallone critical pointof the liquid drop model suggests that the large anisotropy
for 22Ne + 232Th compared with those for 16O + 238U and 12C+ 242Pu obviously relates to the potential energy of thetouching two nuclei compared with the fission potential.
3B03
Radiochemical Approach for Synthesis of
Carboxy Metallofullerene
Takeuchi, E., Hamano, T., Akiyama, K., Kubuki, S. (Tokyo
Metropolitan Univ.)
Carboxy EMFs (CxEMF) are one of the candidates forthe drug deriver system, because these are easily coupledwith the peptide which is conjugated with desired recepterof morbidity parts. 225Ac is considered to be a promising
nuclide for radio immunotherapy using EMFs. However, it
is difficult to make clear their properties of water soluble
225
Ac EMFs. In this study, we report synthesis andproperties of CxEMFs encapsulating La which ishomologous element with Ac by radiochemical approach.
The crude fullerene samples containg La EMFs were
irradiated by thermal neutron at JRR-4 reactor. La EMFs
were separated from irradiated sample by AlCl3 anddissolved to o-dichlorobenzene (DCB). After that, succinicacid peroxide was added. This solution was stirred andheated at 80 oC for 48 hours in Ar gas flow. Produced La
CxEMFs were extracted by 0.2 M NaOH solution andinjected into Sephadex G-25 size exclusion gel column with
deionized water as eluent.
Production yield of La CxEMF was estimated to beabout 60 %. As the result of Sephadex column separation,
the almost all radio activity was observed in 12 to 18 min

fractions. These results indicate the presence of carboxy
EMFs in these fractions.
3B04
Improvement of Metallofullerene separation
using Lewis acid.
Hamano, T., Takeuchi, E., Akiyama, K., and Kubuki, S.
(Tokyo Metropolitan University.)
Variousmethods
toseparate
endohedral-metallofullerenes (EMFs) from other hollow
species (C60, C70 etc.) by using differences of redox
potential between EMFs and hollow fullerenes have beenreported. In a previous study, we reported that the separation
method using AlCl3 as Lewis acid was applicable for the
separation of metallofullerenes encapsulating lanthanoid
elements from hollow fullerenes. However, only 50% of
metallofullerene was recovered in the condition. Aim of thiswork is to improve the separation method of
metallofullerenes from hollow species. In this study, wequantitatively discuss about the separation yield for the
La@C82 from hollow fullerenes. La@C82 was prepared byarc discharge method and irradiated by thermal neutron at
JRR-4 reactor of JAEA. Separation yield of La@C82 wasdetermined by the comparison of the amount of La@C82
before and after extraction. As a result, separation yield of
La@C82 was found to be almost 100% in the case TiCl4 as
Lewis acid in CS2 solution for 10 min reaction time. This
result shows that the best condition for the separation of themetallofullerenes from hollow species is TiCl4/CS2 for 10
min reaction time.
3B05
The evaluation of Analytical Capability of Cd
and Hg in NMIJ CRM 8133a by Multiple Prompt
Gamma Ray Analysis
Miura T., (NMIJ-AIST), Toh Y., Furutaka K.，Kimura A.，
Koizumi M.，Oshima M., Hara K., Kin T., Nakamura S.,
Harada H.(JAEA)
In this study, the analytical capability of Cd and Hg inplastic certified reference materials by Multiple Prompt
Gamma Ray Analysis (MPGA) was evaluated. NMIJ
CRM 8133a heavy metals in PP resin (Cd, Cr, Hg, Pb; Highconcentration) and BCR 681 PE resin were analyzed by
MPGA at JRR-3 of JAEA. The relationship of between
count rate of 113Cd (the pair of 558.4 keV and 651.26keV)
and Cd amount were examined by least square method.
The correlation factor of the linear fit was 0.9993, quadratic
fit was 0.9995. However, the repeatability of MPGA
results were 1 to 5 %. The analytical results of Cd in BCR
681 was 21.0 mg/kg ± 1.2 mg/kg（RSD: 5.7 %）. The
analytical result of MPGA was in good agreement with thecertified value (21.7 mg/kg ± 0.7 mg/kg).
3B06
Non-destructive
andMulti-elemental
Analysis of Bulk Materials by Muonic X-ray
Kubo, M. K.1, Nagatomo, T.1, Suzuki, T.1, Ninomiya, K.2,
Higemoto, W.2, Sakamoto, S.2, Kawamura, N.3, Strasser, P.3,
Shimomur, K.3, Miyake, Y.3, Saito, T.4 (ICU1, JAEA2, KEK3,
Museum. Japan. History4)
Negative muons entering materials lose kinetic energy
and are eventually captured by atoms to form muonic atoms.
After atomic capture, the negative muon in the muonic atom
experiences a cascade transition from higher energy muonicorbitals to lower ones with emission of muonic X-rays.
The energy of the muonic X-ray is also about 200 times

greater than the corresponding electronic X-rays and alsocharacteristic of the atom which captured the muon. The
yield of muonic X-rays from the material is proportional tothe atomic density of the element in the material to a first
approximation. The energetic muonic X-ray emitted froma bulk sample can penetrate and escape to the surface of thesample without significant absorption. By measuring themuonic X-rays with a Ge detector, elmental analysis of themuon capture site in the sample is achievable. epth
profiling as deep as a few cm is possible by varying theincident energy of the muon beam. Thus we have beendeveloping a muonic X-ray elemental analysis system at the
J-PARC/MUSE facility in Japan. First results of application
to an old Japanese gold coin that successfully gave
elemental compositions at two different depths will bepresented.
3B07
Nuclear and radiochemical study of
production and utilization of radioactive astatine
isotopes using lithium ion beams at the tandem
accelerator of JAEA-Tokai
Nishinaka , I.1, Yokoyama, A.2, Washiyama, K.3, Amano, R.3,
Yamada, N.4, Ishiguro, R.5, Makii, H.1, Hashimoto, K.6(1ASRC, JAEA, 2Inst. Sci. Eng., Kanazawa Univ., 3College
Med. Pharmaceutical and Health Sci., Kanazawa Univ.,
4Grad. School Nat. Sci. Tech., Kanazawa Univ., 5Fac. Sci.,
Kanazawa Univ., 6Quantum Beam Sci. Directorate, JAEA )An D radioactive nuclide 211At with a half-life of 7.2 h
is a prospective candidate for utilization in targeted alpharadiotherapy. We have tried to measure excitation functionof 211At in the reaction of 29-48 MeV 7Li+natPb at the
tandem accelerator of JAEA-Tokai. The cross sections ofradioactive products were determined by J-ray spectrometry.
It was found that the excitation functions of astatine
isotopes were reproduced by a statistical calculation with
the HIVAP code. Although the calculation predicted that211
At had large cross sections below 45 MeV compared withthe other astatine isotopes, the intense J-rays of the astatine
isotopes with shorter half lives made it impossible tomeasure the 687 keV photopeak (IJ  of 211At.
Besides, a chemical behavior of carrier-free radioactive
astatine isotopes has been studied with a dry-chemistry
method. Details will be shown in the presentation.
3B08
Challenge for establishing a simplified
separation process of MA using novel R-BTP
adsorbents2
Usuda, S.1, Wei, Y.-Z.1, Xu, Y.1, Li, Z.1, Liu, R.1, Kim, S.Y.1,
Wakui, Y.2, Hayashi, H.2, Yamazaki, H.1(1 Tohoku Univ. CYRIC., 2 AIST Tohoku)
In order to directly separate trivalent minor actinides(MA: 241, 242m, 243Am, 243,244Cm etc.) from fission products(FP) containing rare earths (RE) in high level radioactive
liquid waste (HLLW), the authors have challenged forestablishing a simplified MA separation process by
extraction chromatography using a single column. We haveattempted to apply a new type of nitrogen-donor ligands,
R-BTP (2,6-bis(5,6-dialkyl-1,2,4-triazin-3-yl) pyridine, R:
alkyl group) as an extractant because it shows highextraction selectivity for Am(III) over RE(III). It wasreported that the R-BTP ligands showed different properties
such as adsorbability and stability by having different alkyl
groups. Therefore, some novel adsorbents were prepared byimpregnating different type of R-BTP ligands (isohexyl-,
isoheptyl- and Cyheptyl-BTP) into the porous
silica/polymer composite support (SiO2-P particles). This
presentation deals with i) comparison with adsorption anddesorption properties of Am and some FP in HNO3 solution
onto the novel-BTP adsorbents, ii) hydrolytic and radiolytic
stabilities of the adsorbents, and iii) successful evaluation of
single-column separation of Am from FP using the mostpromising R-BTP adsorbent under temperature control.
3B09
Solvent extraction of lanthanides andactinides using phosphine donor extractant
Miyashita, S., Kitatsuji, Y., Kimura, T. (JAEA)
Solvent extraction of trivalent actinide (241Am and244Cm) and lanthanide (Eu) ions using phosphine donor
extractantssuchasTriphenylphosphine(TPP),
Bis(diphenylphosphino)methane(DPPM)andBis(diphenylphosphino)ethane (DPPE) were investigated.
The aqueous phase were 0.10 moldm-3 sodium perchlorate
solution containing trace amounts of radionuclides (241Am
or 244Cm) or 10-4 moldm-3 non-radioactive Eu. The organic
phases were 1,2-dichloroethane containing various
concentrations of phosphine donor extractants. Eqvolumesof the aqueous phase and the organic phase were mixed invial and were shaken 30 minutes at 298 K. In the results, allelements were extracted into organic phase from aqueous
phase. Compared to the same experimental conditions, thedistribution ratios were decreased in the following order,
DPPM > DPPE > TPP. The separation factors between Am
and Eu are 80 for DPPM, 40 for DPPE and 7 for TPP
respectively. In all cases, the separation factors between Am
and Cm were nearly 2.
3B10Synthesis and properties of new pentavalenturanium complexes having two salophen-type ligands
Nakatsuka, K., Yoshimura, T., Shinohara, A. (Osaka Univ.)
In the previous study, tetravalent uranium complexes
in which an uranium was sandwiched by two salophen-type
ligands with various substituents were synthesized. In thecyclic voltammetry, reversible redox waves of thosecomplexes showed in the range of －0.4 – 0 V vs. Fc+/Fc
and the potential varied systematically depending on theelectron donating and accepting abilities of substituents.
From the results, we supposed that this type of complex isstable to the redox reacrtion to give pentavalent uranium
complex.
The pentavalent uranium complexwas obtained as
black crystals by chemically oxidizing of [U(salomphen)2](salomphen=
N,N'-4,5-dimethyl-1,2phenylenebis(2-hydroxybenzylidenimine)).
In the UV-visible spectrum of black crystal indichloromethane, very large molar absorption coefficient
was observed in the region < 500 nm, suggesting thatexistence of salomphen in the complex. In the IR
spectrum of the crystal, the bands originated fromsalomphen and PF6－ were exhibited. This suggests thatthe net charge of the complex is positive. In the 1H NMR
spectrum of the crystal in CD2Cl2 at 30 °C, the chemical
shifts of signals were beyond the usually observes region in
the diamagnetic complex and were significantly dependent
on the temperature. These chemical shift values andtemperature dependence were differed from those of

[U(salomphen)2]. From these results, we identified theblack crystals as [U(salomphen)2]PF6.