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Tc for Compton camera imagingHatsukawa, Yuichi; Hashimoto, Kazuyuki; Tsukada, Kazuaki; Sato, Tetsuya; Asai, Masato; Toyoshima, Atsushi; Nagai, Yasuki; Tanimori, Toru*; Sonoda, Shinya*; Kabuki, Shigeto*; et al.
Journal of Radioanalytical and Nuclear Chemistry, 303(2), p.1283 - 1285, 2015/02
Times Cited Count：2 Percentile：17.57(Chemistry, Analytical)Technetium-99m (
Tc) is used in radioactive medical diagonostic tests, for example as a radioactive tracer that medical equipment can detect in the human body. It is well suited to the role because it emits readily detectable 141 keV 
rays, and its half-life is 6.01 hours (meaning that about 94% of it decays to technetium-99 in 24 hours). There are at least 31 commonly used radiopharmaceuticals based on technetium-99m for imaging and functional studies of the brain, myocardium, thyroid, lungs, liver, gallbladder, kidneys, skeleton, blood, and tumors. Recent years, with the develop-ment of the Compton camera which can realize high position resolution, technetium isotopes emitting high energy -rays are required. In this study, technetium-95m which emits some rays around 800 keV was produced by the 
Mo(p,n)Tc reaction.
Nagai, Yasuki; Hashimoto, Kazuyuki; Hatsukawa, Yuichi; Saeki, Hideya; Motoishi, Shoji; Sonoda, Nozomi; Kawabata, Masako; Harada, Hideo; Kin, Tadahiro*; Tsukada, Kazuaki; et al.
Journal of the Physical Society of Japan, 82(6), p.064201_1 - 064201_7, 2013/06
Times Cited Count：43 Percentile：85.02(Physics, Multidisciplinary)Ishii, Yasuo; Toyoshima, Atsushi; Tsukada, Kazuaki; Asai, Masato; Li, Z.*; Nagame, Yuichiro; Miyashita, Sunao*; Mori, Tomotaka*; Suganuma, Hideo*; Haba, Hiromitsu*; et al.
Bulletin of the Chemical Society of Japan, 84(9), p.903 - 911, 2011/09
Times Cited Count：17 Percentile：49.33(Chemistry, Multidisciplinary)The cation-exchange behavior of element 104, rutherfordium (Rf), was investigated together with its lighter group-4 homologues Zr and Hf, and the tetravalent pseudo-homologue Th in HF/HNO
mixed solution. The results demonstrate that distribution coefficients (
) of Rf in HF/0.10 M HNO decrease with increasing concentration of the fluoride ion [F
], indicating the consecutive formation of fluorido complexes of Rf. We also measured the values of Rf and the homologues as a function of the hydrogen ion concentration [H
]. The log values decrease linearly with an increase of log [H] with slopes between -2.1 and -2.5. This indicates that these elements are likely to form the same chemical compounds: mixture of [MF]
and [MF
]
(M = Rf, Zr, Hf and Th) in the studied solution. It is also ascertained that sequence in the fluoride complex formation is Zr 
Hf 
Rf Th.
Izumo, Hironobu; Chimi, Yasuhiro; Ishida, Takuya; Kawamata, Kazuo; Inoue, Shuichi; Ide, Hiroshi; Saito, Takashi; Ise, Hideo; Miwa, Yukio; Ugachi, Hirokazu; et al.
JAEA-Technology 2009-011, 31 Pages, 2009/04
JAEA-Technology-2009-011.pdf:4.38MB
Regarding Irradiation Assisted Stress Corrosion Cracking (IASCC) for austenitic stainless steel of the light water reactor (LWR), a lot of data that concerns the post irradiation evaluation (PIE) is acquired. However, IASCC occurs in LWR condition. Therefore, it is necessary to confirm adequacy of the PIE data comparing the experiment data under the simulated LWR condition. Bigger specimen is needed to acquire the effective data for the destruction dynamics in the study of stress corrosion cracking under neutron irradiation condition. Therefore, development of a new crack growth unit which can load to bigger is necessary to the neutron irradiation test. As a result, a prospect was provided in the unit that could load to specimen by changing load mechanism to the lever type from the linear type. And also, in the development of crack propagation unit, some technical issues were extracted from the discussion of the unit structure adopting the LVDT (Linear Variable Differential Transformer).
Ishii, Yasuo; Toyoshima, Atsushi; Tsukada, Kazuaki; Asai, Masato; Tome, Hayato; Nishinaka, Ichiro; Nagame, Yuichiro; Miyashita, Sunao*; Mori, Tomotaka*; Suganuma, Hideo*; et al.
Chemistry Letters, 37(3), p.288 - 289, 2008/03
Times Cited Count：20 Percentile：55.03(Chemistry, Multidisciplinary)We have investigated cation-exchange behavior of Rf together with the lighter homologues of the group-4 elements Zr and Hf, and the tetravalent pseudo-homologue Th, in HF/HNO solution using Automated Ion exchange separation apparatus coupled with the Detection system for Alpha spectroscopy (AIDA). The 
values of Zr, Hf, Th and Rf in HF/0.1 M HNO were decreased with increasing the concentration of the fluoride ion [F], indicating the formation of the fluoride complexes. The sequence of the fluoride complexation strength is Zr Hf Rf Th.
O-water flow in tomato and rice in the light and dark using a positron-emitting tracer imaging system (PETIS)Mori, Satoshi*; Kiyomiya, Shoichiro*; Nakanishi, Hiromi*; Ishioka, Noriko; Watanabe, Satoshi; Osa, Akihiko; Matsuhashi, Shimpei; Hashimoto, Shoji; Sekine, Toshiaki; Uchida, Hiroshi*; et al.
Soil Science and Plant Nutrition, 46(4), p.975 - 979, 2000/12
Times Cited Count：29 Percentile：57.37(Plant Sciences)no abstracts in English
/HF mixed solution, 2Ishii, Yasuo; Tome, Hayato; Toyoshima, Atsushi; Asai, Masato; Nishinaka, Ichiro; Tsukada, Kazuaki; Nagame, Yuichiro; Miyashita, Sunao*; Mori, Tomotaka*; Suganuma, Hideo*; et al.
no journal, ,
Chemical properties of rutherfordium (Rf, the element 104) in HNO/HF mixed solutions have been investigated using cation-exchange chromatography. Distribution coefficients of Rf on the cation-exchange resin as a function of hydrofluoric-acid and nitric-acid concentrations have been measured precisely, and it was found that the strength of the fluoride complex formation of Rf is much weaker than those of lighter group 4 homologs Zr and Hf. The same result was obtained through the anion-exchange chromatography. These results enabled us to quantitatively account for the fluoride complexation of Rf.
/HF solutionIshii, Yasuo; Tome, Hayato; Toyoshima, Atsushi; Asai, Masato; Nishinaka, Ichiro; Tsukada, Kazuaki; Nagame, Yuichiro; Miyashita, Sunao*; Mori, Tomotaka*; Suganuma, Hideo*; et al.
no journal, ,
The cation-exchange behavior of rutherfordium(Rf) in HNO/HF solution has been studied based on an atom-at-a-time scale. In the symposium, we will discuss the fluoride complexation of rutherfordium in comparison with that of Zr, Hf and Th.
Nishiyama, Yutaka; Chimi, Yasuhiro; Ise, Hideo; Nakamura, Takehiko; Ishitsuka, Etsuo; Tsukada, Takashi
no journal, ,
no abstracts in English
Chimi, Yasuhiro; Nishiyama, Yutaka; Ise, Hideo; Nakamura, Takehiko; Ishitsuka, Etsuo; Tsukada, Takashi
no journal, ,
Japan Atomic Energy Agency (JAEA) has a plan of refurbishment of Japan Materials Testing Reactor (JMTR) and reoperation from FY 2011 in order to contribute to development and safe operation of light water reactors (LWRs). Installation of fuels and materials irradiation facilities in JMTR is now in progress in parallel with the refurbishment of JMTR. In the present report, we give an outline of fuels and materials irradiation tests by using JMTR, especially neutron irradiation test program on materials for reactor pressure vessel steels and core shrouds for solving issues on plant aging, and current status of installation of the test facilities in JMTR.
Chimi, Yasuhiro; Hanawa, Satoshi; Ise, Hideo; Kawaguchi, Yoshihiko; Kaji, Yoshiyuki; Tsukada, Takashi; Nakajima, Hajime; Nishiyama, Yutaka; Nakamura, Takehiko
no journal, ,
Japan Atomic Energy Agency (JAEA) has a plan of irradiation tests by using Japan Materials Testing Reactor (JMTR), in order to evaluate the effects of change of materials and water chemistry caused by the neutron/-ray irradiation on the integrity of in-core structural materials for light water reactors (LWRs). In the present study, we are planning the in-pile tests for irradiation-assisted stress corrosion cracking (IASCC) and water chemistry, focusing on the irradiation effects not only of materials but also of water environment (radiolysis of water). The outline of the test conditions will be reported.
Hirose, Kentaro; Nishio, Katsuhisa; Ikezoe, Hiroshi; Mitsuoka, Shinichi; Nishinaka, Ichiro; Makii, Hiroyuki; Wakabayashi, Yasuo*; Tsukada, Kazuaki; Asai, Masato; Nagame, Yuichiro; et al.
no journal, ,
