Effect of positive Q-value neutron transfers on sub-barrier fusion reactions

The role of positive Q-value neutron transfers in sub-barrier fusion reactions has been studied with a modified quantum coupled channels model with all order couplings（CCFULL model）. Neutron rearrangement related only to the dynamical matching condition with no free parameters is implemented in the...

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Bibliographic Details
Published inChinese physics C Vol. 41; no. 6; pp. 75 - 79
Main Author 温培威 冯兆庆 张凡 李成 林承键 张丰收
Format Journal Article
LanguageEnglish
Published 01.06.2017
Subjects
中子
匹配条件
参数模型
实验数据
熔合截面
碰撞系统
融合反应
通道模型
Online AccessGet full text
ISSN1674-1137
0254-3052
DOI10.1088/1674-1137/41/6/064102

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Summary:The role of positive Q-value neutron transfers in sub-barrier fusion reactions has been studied with a modified quantum coupled channels model with all order couplings（CCFULL model）. Neutron rearrangement related only to the dynamical matching condition with no free parameters is implemented in the model, which provides a way to understand especially the Q-value dependence of sub-barrier fusion reactions. The fusion cross sections of the collision systems 40^Ca＋94,96^Zr have been calculated and analyzed. The general trend of experimental data can be reproduced well with additional channels for neutron rearrangement. We find that enhancement of sub-barrier fusion cross sections is closely related to the Q-value of the transferred neutrons, in particular for channels with sequential even number transferred neutrons.
Bibliography:The role of positive Q-value neutron transfers in sub-barrier fusion reactions has been studied with a modified quantum coupled channels model with all order couplings（CCFULL model）. Neutron rearrangement related only to the dynamical matching condition with no free parameters is implemented in the model, which provides a way to understand especially the Q-value dependence of sub-barrier fusion reactions. The fusion cross sections of the collision systems 40^Ca＋94,96^Zr have been calculated and analyzed. The general trend of experimental data can be reproduced well with additional channels for neutron rearrangement. We find that enhancement of sub-barrier fusion cross sections is closely related to the Q-value of the transferred neutrons, in particular for channels with sequential even number transferred neutrons.
11-5641/O4
Pei-Wei Wen1,2 ,Zhao-Qing Feng3, Fan Zhang1,2 ,Cheng Li1,2 , Cheng-Jian Lin4, Feng-Shou Zhang1,2（1.The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China 2.Beijing Radiation Center, Beijing 100875, China 3.Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China 4.China Institute of Atomic Energy, Beijing 102413, China 5 .Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou , Lanzhou 730000, China）
sub-barrier fusion, CCFULL model, neutron transfer
ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/41/6/064102