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Shimada, Kazuya; Ishizuka, Chikako*; Chiba, Satoshi*
Proceedings of 12th International Conference on Nuclear Criticality Safety (ICNC2023) (Internet), 9 Pages, 2023/10
TKE (total kinetic energy), one of the nuclear data, is the kinetic energy of fission fragments, and influences not only the energy obtained in nuclear fission, but also the criticality safety assessment. Exploring the underlying factors influencing TKE is vital for fundamental research and utilization of nuclear energy. Instinctively, it is expected that as the energy of incident neutrons on the target nucleus increases, thus leading to a corresponding increase in TKE. However, experimental evidence suggests that TKE decreases as the excitation energy increases. In this study, we investigate this phenomenon. The four-dimensional Langevin model captures the overall shape of the nuclear fission fragment as Brownian motion until the nuclear fission. Using this model, we calculated the excitation energy dependence of TKE. Our investigation reveals that the decreasing trend in TKE can be attributed to the deformation of the heavy fission fragments.
Iwamoto, Osamu; Iwamoto, Nobuyuki; Kunieda, Satoshi; Minato, Futoshi; Nakayama, Shinsuke; Abe, Yutaka*; Tsubakihara, Kosuke*; Okumura, Shin*; Ishizuka, Chikako*; Yoshida, Tadashi*; et al.
Journal of Nuclear Science and Technology, 60(1), p.1 - 60, 2023/01
Times Cited Count：249 Percentile：99.99(Nuclear Science & Technology)Tsubakihara, Kosuke*; Okumura, Shin*; Ishizuka, Chikako*; Yoshida, Tadashi*; Minato, Futoshi; Chiba, Satoshi*
Journal of Nuclear Science and Technology, 58(2), p.151 - 165, 2021/02
Times Cited Count：12 Percentile：72.09(Nuclear Science & Technology)Chiba, Satoshi*; Ishizuka, Chikako*; Tsubakihara, Kosuke*; Iwamoto, Osamu
JAEA-Conf 2019-001, 203 Pages, 2019/11
JAEA-Conf-2019-001.pdf:18.86MB
The 2018 Symposium on Nuclear Data was held at Multi-Purpose Digital Hall and Collaboration Room of Tokyo Institute of Technology, on November 29 and 30, 2018. The symposium was organized by the Nuclear Data Division of the Atomic Energy Society of Japan (AESJ) in cooperation with Sigma Special Committee of AESJ, Nuclear Science and Engineering Center of Japan Atomic Energy Agency, and Laboratory for Advanced Nuclear Energy of Institute of Innovative Research, Tokyo Institute of Technology. In the symposium, there were one tutorial, "Development of nuclear data processing code FRENDY", one special lecture "What the future holds for Nuclear Energy" and seven oral sessions, "Nuclear Data and Future Perspectives", "Current Status and Future Perspectives of Reactor Physics", "Topics", "Nuclear Data Applications", "International Session", "Nuclear Data Measurements and New Technology for Nuclear Reactor Diagnosis", and "Data Needs from New Fields". In addition, recent research progress on experiments, evaluation, benchmark and application was presented in the poster session. Among 82 participants, all presentations and following discussions were very active and fruitful. This report consists of total 35 papers including 13 oral and 22 poster presentations.
UIshizuka, Chikako*; Usang, M. D.*; Ivanyuk, F. A.*; Maruhn, J. A.*; Nishio, Katsuhisa; Chiba, Satoshi
Physical Review C, 96(6), p.064616_1 - 064616_9, 2017/12
Times Cited Count：71 Percentile：97.49(Physics, Nuclear)Kimura, Atsushi; Katabuchi, Tatsuya*; Hori, Junichi*; Iwamoto, Osamu; Iwamoto, Nobuyuki; Nakamura, Shoji; Nakayama, Shinsuke; Endo, Shunsuke; Rovira Leveroni, G.; Ishizuka, Chikako*; et al.
no journal, ,
no abstracts in English
Katabuchi, Tatsuya*; Li, G.*; Kondo, Hiromi*; Maloney, M.*; Ishizuka, Chikako*; Tosaka, Kenichi*; Rovira Leveroni, G.; Kimura, Atsushi; Endo, Shunsuke; Nakamura, Shoji
no journal, ,
Neutron nuclear data of structural materials used in innovative nuclear reactors were measured mainly for charged-particle emission reactions. A scintillation detector added with sample material was used for the measurements. The results will be reported.
Kono, Taiki*; Fujio, Kazuki*; Minato, Futoshi; Ishizuka, Chikako*; Chiba, Satoshi*
no journal, ,
no abstracts in English
C(d,n)
N nuclear reactionRossi, A.*; Katabuchi, Tatsuya*; Ishizuka, Chikako*; Nakayama, Shinsuke
no journal, ,
Among currently available neutron sources, the 0.5 MeV - 1.5 MeV energy range is very rare, though neutron cross section in the energy range is necessary for many applications such as the design of the Molten Chloride Salt Fast Reactor. Under these circumstances, this work investigated the development of a neutron source with energies between 0.5 MeV and 1.5 MeV exploiting the C(d,n)N nuclear reaction. The deuteron beam was assumed to be provided by the Pelletron accelerator at the Tokyo Institute of Technology. The neutron fluxes obtained from the assumed setup were estimated by the simulations with the MCNP code using JENDL-5 and the deuteron cross section data newly evaluated in the low incident energy region.
Ishizuka, Chikako*; Ueno, Maomi*; Iwamoto, Osamu; Takeda, Satoshi*
no journal, ,
Fission nuclear data is essential information for the realization of safe nuclear power systems, but especially in terms of fission yield, the energies for which nuclear data is prepared are extremely limited. In this study, we are attempting to improve the accuracy of fission nuclear data for isotopes and energy regions with scarce experimental values using machine learning. Additionally, we have verified and evaluated the impact of the newly constructed fission nuclear data on reactor physics. This presentation will outline these series of efforts.
Fukahori, Tokio; Aikawa, Masayuki*; Ishizuka, Chikako*; Katabuchi, Tatsuya*; Niikura, Megumi*; Fukuda, Shigekazu*
no journal, ,
With the rapid development of the nuclear medicine field, nuclear data for medical isotope production and primary radiation exposure assessment in radiation therapy have been developed at a rapid pace. The next step will be to develop more advanced nuclear data, such as the nuclear data that is lacking for medical isotope production and the radiation dose assessment of medical personnel involved in radiation therapy. In light of this current situation, we held two workshops with the aim of examining nuclear data that may become important in the medical industry in a broad sense in the future, focusing on topics related to medical isotopes and radiation exposure in radiation therapy. In this presentation, we will share an overview of the contents of the workshops and the key points of discussion toward future nuclear data.
