期刊
NUCLEAR PHYSICS A
卷 979, 期 -, 页码 113-142出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nuclphysa.2018.09.039
关键词
Isomeric cross-section ratio analysis; Effective momentum of inertia; Mass and energy dependence
The ratio of the effective moment of inertia to the rigid body moment of inertia (Theta(eff)/Theta(rig)) parameter of the spin distribution of the level density was determined for 61 nuclei covering the mass range of 44 to 200. The experimental data for 25 isomeric pairs were compared with the model calculations carried out with the TALYS code. The reduced chi(2) values were calculated to describe the deviation of the experimental data from the model calculation as a function of the n = Theta(eff)/Theta(rig) parameter. A term eta(d) was introduced by calculating the Theta(eff)/Theta(rig )value from the low energy discrete levels of the nucleus. The eta/eta(d) values seem to be independent of the mass number and the values independent of the excitation energy. The mass number and (N-Z) dependences of the eta values were studied. Then values for the odd mass nuclei show a characteristic exponential decrease as a function of the mass number or (N-Z). The eta values for the even type of nuclei show more complicated behavior. The odd-even effect of Theta(eff)/Theta(rig) may change the calculated activation cross section significantly. (C) 2018 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据