Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Esaka, Konomi; Yasuda, Kenichiro; Esaka, Fumitaka; Magara, Masaaki; Sakurai, Satoshi; Usuda, Shigekazu; Nakayama, Shinichi
no journal, ,
no abstracts in English
Yasuda, Kenichiro; Magara, Masaaki; Sakurai, Satoshi; Usuda, Shigekazu; Shinohara, Nobuo
no journal, ,
no abstracts in English
Kokubu, Yoko; Yasuda, Kenichiro; Magara, Masaaki; Miyamoto, Yutaka; Sakurai, Satoshi; Usuda, Shigekazu; Yoshikawa, Shusaku*; Yamazaki, Hideo*; Nagaoka, Shinji*
no journal, ,
no abstracts in English
Miyamoto, Yutaka; Kokubu, Yoko; Sakurai, Satoshi; Usuda, Shigekazu
no journal, ,
no abstracts in English
Lee, C. G.; Iguchi, Kazunari; Suzuki, Daisuke; Esaka, Fumitaka; Magara, Masaaki; Sakurai, Satoshi; Usuda, Shigekazu
no journal, ,
no abstracts in English
Doi, Reisuke; Xia, X.; Shibata, Masahiro; Kitamura, Akira; Yoshikawa, Hideki
no journal, ,
Assessment for radionuclides sorption onto a rock in deep underground is important. The distribution coefficient, K
is a available parameter to assess the sorption and the method to predict the sorption in deep environment has to be established. We applied a model that the sorption of Cs is dominated by the ion exchange reaction on the illite for experimental results of Cs sorption onto Horonobe sedimentary rock. The equilibrium concentration of Cs was calculated the geochemical calculation code, PHREEQC under the experiment condition with major cations and solid/liquid ratio to estimate the K value. Comparing the experimental results with the calculated one, the model could explain well the dependence of K values on Cs equilibrium concentration. By using the model, it is possible to assess for Cs sorption onto a sedimentary rock. However, there were some differences between the experimental K values and the calculated one. One of the causes for that was the uncertainties of analytical technique of illite content.
-particles in the 
O + 
Pu reactionNishinaka, Ichiro; Tanikawa, Masashi*; Nagame, Yuichiro; Asai, Masato; Tsukada, Kazuaki; Toyoshima, Atsushi; Ichikawa, Takatoshi*
no journal, ,
no abstracts in English
Fujiwara, Asako; Kameo, Yutaka; Haraga, Tomoko; Nakashima, Mikio
no journal, ,
no abstracts in English
Toraishi, Takashi; Kimura, Takaumi; Arisaka, Makoto
no journal, ,
no abstracts in English
Koura, Hiroyuki; Chiba, Satoshi
no journal, ,
no abstracts in English
Osada, Naoyuki*; Oki, Yuichi*; Yamasaki, Keizo*; Yokoyama, Sumi
no journal, ,
no abstracts in English
Sato, Tadashi
no journal, ,
Activity of Pm-147 in same consumer goods (glow starter for fluorescent light) is measured by Ge-
ray spectrometer. Activity of Pm-147 in glow starters scattered between 1.3E3 -5.3E3 Bq. Together with Pm-147, Pm-146 was found in the glow starters. Activity ratio of Pm-146/ Pm-147 ranged from 5.8E-5 to 1.1E-4. The ratio is too high in comparison with ratio of cumulative fission yield of Pm-146/Pm-147 for U-235 thermal fission, 2E-10. Calculation of the ratio of Pm-146/ Pm-147 by ORIGEN2 show 2.47E-5 for PWR(burnup 33 GWD/MT) and 1.53E-5 for BWR(burnup 27.5 GWD/MT). These ratios agree with the ratio found for glow starters taking account of decay of two nuclides Pm-146 t1/2 5.53y, Pm-147 t1/2 2.26y. As no cumulative fission yield of Pm-146 in the ORIGEN2 library, production pass of Pm-146 is not fission but other nuclear reaction such as Pm-147(n,2n)Pm-146.
ssbauer spectra of U-Eu mixed oxideMasaki, Nobuyuki; Nakada, Masami; Otobe, Haruyoshi
no journal, ,
no abstracts in English
Kasamatsu, Yoshitaka; Toyoshima, Atsushi; Tome, Hayato; Tsukada, Kazuaki; Haba, Hiromitsu*; Nagame, Yuichiro
no journal, ,
no abstracts in English
Toyoshima, Atsushi; Kasamatsu, Yoshitaka; Tsukada, Kazuaki; Haba, Hiromitsu*; Shinohara, Atsushi*; Nagame, Yuichiro
no journal, ,
no abstracts in English
Kubota, Hiroki*; Kitatsuji, Yoshihiro; Okugaki, Tomohiko*; Kimura, Takaumi; Yoshida, Zenko; Kihara, Sorin*
no journal, ,
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.
Nagame, Yuichiro
no journal, ,
no abstracts in English
Re- and 
Re-DMSAs and removal of impurity in the productKomoto, Kazuki*; Nogawa, Norio*; Sato, Jun*; Makide, Yoshihiro*; Morikawa, Naotake*; Hashimoto, Kazuyuki; Sorita, Takami
no journal, ,
Complex compound of Re and Re with meso-2,3-dimercaptosuccinic acid (DMSA) is expected to be effective against cancerous disease. This compound is synthesized with high radiochemical yield by use of SnCl
as reducing reagent. However, the product contains a large amount of SnCl which is harmful to human body. The removal of tin impurity was tested with cation exchange resin. Re-DMSA complex was also obtained with high radiochemical yield by use of other harmless reducing agents (L-ascorbic acid, NaSO, HPO). Synthesized Re-DMSA by use of SnCl was stable in sodium acetate buffer for 5 hours, while survival amount of Re-DMSA synthesized by other reducing agents decreased in a short time.
ray detectionHatsukawa, Yuichi; Miyamoto, Yutaka; Toh, Yosuke; Oshima, Masumi; Hayakawa, Takehito
no journal, ,
We developed a new technique of trace element analysis based on neutron activation analysis with coincident -ray detection. In order to improve the low efficiency of coincident -ray detection, an array of 16 Ge detectors with BGO Compton suppressors was used for this method. High sensitive trace element analyses without chemical separation were carried out by the combination of neutron activation analysis and the method of multiparameter coincidence spectroscopy. In this study, we try to measure trace elements in presolar grains using neutron activation analysis with multiple ray detction. Presolar grains are synthesis in stars such as the Super nova or Red giant, and found in the primitive meteorites. We obtained 160 micro grams of nanodiamonds which is one of presolar grains from the Allende meteorite, and measured trace elements in the grains using this method. 8 elements in presolar grain were detected.