Clustering pre-equilibrium model analysis for nucleon-induced alpha-particle spectra up to 200 MeV
国枝 賢; 河野 俊彦*; Chadwick, M. B.*; 深堀 智生; 渡辺 幸信*
Kunieda, Satoshi; Kawano, Toshihiko*; Chadwick, M. B.*; Fukahori, Tokio; Watanabe, Yukinobu*
The clustering exciton model of Iwamoto and Harada is applied to the analysis of pre-equilibrium $$(N,xalpha)$$ energy spectra for medium-to-heavy nuclei up to 200 MeV. In this work, we calculate alpha-particle formation factors without any approximations that appear in the original model. The clustering process is also considered in both the primary and second pre-equilibrium emissions. We optimize the exciton and the clustering model parameters simultaneously by looking at the experimental $$(N,xN)$$ and $$(N,xalpha)$$ energy spectra. The experimental alpha-particle spectra are well reproduced with a unique set of clustering model parameters, which is independent of incident neutrons/protons. The present analysis also implies that the clustering model parameter is not so different between the medium and heavy nuclei. Our calculations reproduce experimental data generally well up to the incident energy of $$sim$$150 MeV, but underestimations are seen above this energy.
使用言語 : English
掲載資料名 : EPJ Web of Conferences (Internet)
: 21
ページ数 : p.09003_1 - 09003_8
発行年月 : 2012/02
出版社名 : EDP Sciences
発表会議名 : 3rd International Workshop on Compound-Nuclear Reactions and Related Topics (CNR '11)
開催年月 : 2011/09
開催都市 : Prague
開催国 : Czech Republic
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登録番号 : BB20111738
抄録集掲載番号 : 41000128
論文投稿番号 : 11709
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