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SiYamashita, Takuya*; Shimoyama, Yusuke*; Haga, Yoshinori; Matsuda, Tatsuma*; Yamamoto, Etsuji; Onuki, Yoshichika; Sumiyoshi, Hiroaki*; Fujimoto, Satoshi*; Levchenko, A.*; Shibauchi, Takasada*; et al.
Nature Physics, 11(1), p.17 - 20, 2015/01
Times Cited Count：49 Percentile：89.24(Physics, Multidisciplinary)Chiba, Satoshi; Koura, Hiroyuki; Maruyama, Toshiki; Ota, Masahisa*; Tatsuda, Sayuki*; Wada, Takahiro*; Tachibana, Takahiro*; Sumiyoshi, Kosuke*; Otsuki, Kaori*; Kajino, Toshitaka*
AIP Conference Proceedings 1016, p.162 - 167, 2008/05
Effect of the 
-delayed fission in r-process abundance is investigated. The data base for the fission fragment mass distribution used in the r-process network calculation is constructed based on the 2-center shell model and Langevinequation. The -decay rates (no emissive, neutron emission and -delayed fission) are also newly calculated with the gross theory. The differences appeared in the final element abundance calculated with and without fission process are demonstrated and the mass region modified by the fission products is presented.
and its carbon isotope analyses in the semi-natural woods on the campus of Hokkaido UniversityFujiyoshi, Ryoko*; Haraki, Yukihide*; Sumiyoshi, Takashi*; Amano, Hikaru
JAEA-Conf 2008-003, p.79 - 83, 2008/04
Carbon dioxide in soil air has been monitored in the holes at 30 and 100 cm in depth under a cool-temperate deciduous stand on the campus of Hokkaido University since June in 2007. Air samples were collected periodically from the holes, and also from the atmosphere in the woods (2 m in height from the soil surface). Carbon isotopic analyses of the CO samples were performed by AMS at the Mutsu Facility of the Japan Atomic Energy Agency (JAEA-AMS-MUTSU). Preliminary results show that CO in the woods including the air at 2 m in height may result from mixing of atmospheric air and soil components of various sources, such as CO from contemporary soil organic matter and old carbon of deep source to a varying degree depending on meteorological and biological conditions.
Ota, Masahisa*; Tatsuda, Sayuki*; Yamamoto, Kazuyuki*; Asano, Tomomasa*; Wada, Takahiro*; Hashizume, Kazuaki*; Sumiyoshi, Kosuke*; Otsuki, Kaori*; Kajino, Toshitaka*; Koura, Hiroyuki; et al.
Nuclear Physics A, 805(2), p.558 - 560, 2008/02
The data base for the fission fragment mass distribution used in the r-process network calculation is constructed. The differences appeared in the final element abundance calculated with and without fission process are demonstrated and the mass region modified by the fission products is presented.
Yoshida, Kiyoshi; Nishi, Masataka; Tsuji, Hiroshi; Sasaki, Takashi*; Yasukawa, Yukio*; Tsukamoto, Hideo*; *; *; *; Hasegawa, Mitsuru*
Nihon Genshiryoku Gakkai-Shi, 37(10), p.938 - 947, 1995/00
Times Cited Count：2 Percentile：28.12(Nuclear Science & Technology)no abstracts in English
Chiba, Satoshi; Koura, Hiroyuki; Maruyama, Toshiki; Ota, Masahisa*; Tatsuda, Sayuki*; Wada, Takahiro*; Tachibana, Takahiro*; Kajino, Toshitaka*; Sumiyoshi, Kosuke*; Otsuki, Kaori*
no journal, ,
We introduce -delayed fission in r-process calculation, and investigate the difference of the abundance pattern of synthesized nuclei depending on the model of fission fragment mass distribution. We further discuss the impact of it on nucleo-cosmochronometer and possibility to restrict the physical condition of r-process sites.
