Modelling and analysis of nucleon emission from deuteron-induced reactions at incident energies up to 100 MeV

Nakayama, Shinsuke; Kono, Hiroshi*; Watanabe, Yukinobu*; Iwamoto, Osamu; Ye, T.*; Ogata, Kazuyuki*

EPJ Web of Conferences, 122, p.04004_1 - 04004_9, 2016/06

https://doi.org/10.1051/epjconf/201612204004

In recent years, accelerator neutron sources using deuteron-induced reactions on Li, Be, C, etc., are proposed for applications in various fields. Engineering design of such facilities requires deuteron nuclear data in a broad incident energy range. We have developed a computational code system dedicated for deuteron nuclear data evaluation in combination with some theoretical models. The code system has been applied to analyses of double-differential cross sections for C, Al, and Ni at incident energies up to 100 MeV. On the other hand, there is few experimental double-differential cross sections. Therefore, double-differential thick target neutron yields for light nuclei such as Be and C are calculated and compared with experimental data. The presentation will show the validation result of the present modelling for nucleon emissions from deuteron-induced reactions through comparison with available experimental data.

Application of JAERI Quantum Molecular Dynamics model for collisions of heavy nuclei

Ogawa, Tatsuhiko; Hashimoto, Shintaro; Sato, Tatsuhiko; Niita, Koji*

EPJ Web of Conferences, 122, p.04005_1 - 04005_6, 2016/06

BB2015-0309.pdf:0.24MB

https://doi.org/10.1051/epjconf/201612204005

Nucleus-nucleus reactions models are important for radiological safety in heavy ions accelerator facilities such as heavy ion cancer therapy facilities. As one of such models, JAERI Quantum Molecular Dynamics (JQMD) has been successfully used to describe production of residue and secondary particles in nucleus-nucleus collisions. However, it has been pinpointed that formulation of interactions between nucleons were unstable through time evolution therefore heavy nuclei tended to decay before interactions. Such decays could not be distinguished from decay by collisions. In this study, we revised the description of interactions between nucleons to stabilize nuclei before collisions. Moreover, an algorithm to check the stability of ground-state nuclei was introduced. Description of nucleon-nucleon scattering cross sections were improved by introducing the in-medium effects. Fragment production cross sections for heavy targets (e.g. Ag) are predicted in better accuracy by thus developed revised JQMD (JQMD 2.0).

Feasibility study of nuclear transmutation by negative muon capture reaction using the PHITS code

Abe, Shinichiro; Sato, Tatsuhiko

EPJ Web of Conferences, 122, p.04002_1 - 04002_6, 2016/06

https://doi.org/10.1051/epjconf/201612204002

Nuclear transmutation has been investigated to reduce long-lived fission products (LLFPs) in high level radioactive wastes. However, the nuclear transmutation is difficult for some LLFPs (e.g., Sr, Sn and Cs) having small cross-sections of fission and neutron capture. Negative muon is examined to be applied for the nuclear transmutation. Low energy negative muon is captured on an atom, and then it can decay or be further captured on its nucleus. When negative muon is captured on nucleus, some light particles and residual nucleus are produced. Negative muon capture process has been implemented into latest version of PHITS. In this study, we studied the feasibility of nuclear transmutation by negative muon capture reaction for LLFPs using PHITS. Negative muon capture reaction on 90Sr is simulated. It is found that 94% of negative muons are captured on nucleus, and 66% of Sr become stable nuclides or radioactive nuclides having less than 20 days. It is also found that 15% of Sr become Rb having longer half-life than that of Sr.

Large-scale shell-model calculation for -ray strength function

Utsuno, Yutaka; Otsuka, Takaharu*; Shimizu, Noritaka*

no journal, , 

no abstracts in English

Study for fission using multi-nucleon transfer reaction

Nishio, Katsuhisa; Hirose, Kentaro; Lguillon, R.; Orlandi, R.; Nishinaka, Ichiro; Smallcombe, J.*; Chiba, Satoshi; Araki, Shohei*; Watanabe, Yukinobu*; Tatsuzawa, Ryotaro*; et al.

no journal, ,