Fission cross-section evaluations in the frame of the multi-modal fission model for ²³⁷Np(n, f)

详细信息	查看全文 | 推荐本文 |

• 作者：Vladuca ; G. ; Tudora ; Anabella ; Hambsch ; F.-J. ; Oberstedt ; S.
• 关键词：24.10.Pa ; 25.85.EC ; 24.75.+i ; Radioactivity ; ²³⁷Np(n ; f) ; Fission yield ; Hauser&ndash ; Feshbach statistical model ; Transmission coefficients ; Fission barrier parameters ; Fission cross section
• 刊名：Nuclear Physics A
• 出版年：2002
• 期刊代码：44_03759474
• 类别：ph
• 出版时间：August 26, 2002
• 卷：707
• 期：1-2
• 页码：32-46
• 文件大小：177 K

摘要

The statistical model for fission cross-section evaluation is extended by including the concept of multi-modality of the fission process. The three most dominant fission modes, the two asymmetric standard I (S1) and standard II (S2) modes and the symmetric superlong (SL) mode are taken into account. Based on calculations of the nuclear surface in the frame of the multi-modal random neck-rupture model, separate outer fission barriers are considered for each mode, while the inner barriers and isomeric wells are assumed to be the same. Deconvoluted fission cross sections for S1, S2 and SL modes for ²³⁷Np(n,f), based on experimental branching ratios, were calculated for the first time in the incident energy range 0.01 to 5.5 MeV providing good agreement with the experimental fission cross-section data.