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Iwamoto, Hiroki
JAEA-Conf 2023-001, p.40 - 45, 2024/02
no abstracts in English
Tanaka, Shoya*; Nishimura, Nobuya*; Minato, Futoshi
JAEA-Conf 2023-001, p.132 - 137, 2024/02
Nucleosynthesis by the rapid neutron-capture process (
-process) produces elements heavier than iron via neutron-rich nuclides, observed in the solar system and stars with various metallicities. In the -process, fission plays a fundamental role through bridging heavy element abundances with light element ones and by shaping the final -abundance distribution. Nevertheless, due to the difficulty of experimental approaches, most of the fission data available for -process calculations are based on theoretical predictions with phenomenological models. In this study, we focused on the transition of fission mode from asymmetric to symmetric in neutron-rich isotopes, which has been suggested in recent experiments for fermium isotopes. We investigated the fission of neutron-rich nuclei by a theoretical calculation based on the dynamical model and employed Langevin equations. Furthermore, we calculated fission fragment mass yields and prompt neutron emissions by combining Langevin calculations with a statistical model.
UKunieda, Satoshi
JAEA-Conf 2023-001, p.138 - 142, 2024/02
The AMUR code was updated for analysis of neutron cross-sections on the heavier nuclei by introducing approximated R-matrix formulae defined in the ENDF-6 format. In this work, with the updated version of AMUR, let me demonstrate a feasibility analysis to experimental cross-sections on U which are stored in the EXFOR database. It was confirmed that the values of the resonance parameters were successfully obtained through the fitting procedure, together with their covariance data. In this presentation, I will focus on discussions on the resulting correlation matrices of cross-sections, where the present results certainly show traces of constraints from the R-matrix theory.
Konno, Chikara
JAEA-Conf 2023-001, p.143 - 146, 2024/02
I modified NJOY2016.67 to produce photonuclear ACE files which can be used in MCNP6.2 and PHITS3.27 and produced the ACE file of the JENDL-5 photonuclear sub-library. Simple test calculations with the produced ACE file supported that the produced ACE file had no serious problems.
I and 
I using ANNRI at MLF/J-PARCRovira Leveroni, G.; Kimura, Atsushi; Nakamura, Shoji; Endo, Shunsuke; Iwamoto, Osamu; Iwamoto, Nobuyuki; Toh, Yosuke; Segawa, Mariko; Maeda, Makoto; Katabuchi, Tatsuya*
JAEA-Conf 2023-001, p.74 - 79, 2024/02
Ta(n,
)
Ta reactionKawamura, Shiori*; Endo, Shunsuke; Iwamoto, Osamu; Iwamoto, Nobuyuki; Kimura, Atsushi; Kitaguchi, Masaaki*; Nakamura, Shoji; Okudaira, Takuya*; Rovira Leveroni, G.; Shimizu, Hirohiko*; et al.
JAEA-Conf 2023-001, p.115 - 120, 2023/02
no abstracts in English
