2025-06-12 東京科学大学
図1. 水銀180の核分裂片の質量数分布の実験値(黒)と本研究で構築した核分裂モデルの計算結果(青)の比較。赤はチャンス核分裂を考慮しないときの計算結果。
<関連情報>
- https://www.isct.ac.jp/ja/news/9pgrphj76wo7
- https://www.isct.ac.jp/plugins/cms/component_download_file.php?type=2&pageId=&contentsId=1&contentsDataId=1729&prevId=&key=4d0cfb9f80c75e1d7f4dcc13438a83c1.pdf
- https://journals.aps.org/prc/abstract/10.1103/PhysRevC.111.054620
鉛直下領域における殻効果と多重核分裂 Shell effects and multichance fission in the sub-lead region
F. A. Ivanyuk,C. Schmitt,C. Ishizuka,S. Chiba
Physical Review C Published: 20 May, 2025
DOI: https://doi.org/10.1103/PhysRevC.111.054620
Abstract
Within the recently developed five-dimensional Langevin approach for the description of fission of heavy nuclei, we have calculated the fission fragments mass and kinetic energy distributions for the fission of 180Hg and 190Hg formed in the reactions 36Ar+144Sm⇒180Hg and 36Ar+154Sm⇒190Hg at few excitation energies and found very good agreement between the calculated and experimental results. Special attention was paid to the accurate description of the dependence of shell effects on the excitation energy. It was shown that the effect of multichance fission on the mass distribution is noticeable only at small excitation energies. The kinetic energy distributions are more sensitive to pre-scission neutron emission.