Determination of 15N(n,r)16N astrophysical reaction rate via the (7Li,6Li) reaction

WU Zhidan; GUO Bing; LI Zhihong; LI Yunju; SU Jun; PANG Danyang; YAN Shengquan; LI Ertao; BAI Xixiang; DU Xianchao; FAN Qiwen; GAN Lin; HE Jianjun; JIN Sunjun; JING Long; LI Long; LI Zhichang; LIAN Gang; LIU Jiancheng; SHEN Yangping; WANG Youbao; YU Xiangqing; ZENG Sheng; ZHANG Liyong; ZHANG Weijie; LIU Weiping

doi:10.11889/j.0253-3219.2014.hjs.37.100512

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Determination of 15N(n,r)16N astrophysical reaction rate via the (7Li,6Li) reaction

更新时间：2021-03-03

- Determination of 15N(n,r)16N astrophysical reaction rate via the (7Li,6Li) reaction
- NUCLEAR TECHNIQUES Vol. 37, Issue 10, Article number: 100512(2014)
- 作者机构：
  
  1. 中国原子能科学研究院,北京,102413
  2. 北京航空航天大学物理科学与核能工程学院,北京,100191
  3. 深圳大学物理科学与技术学院,深圳,518060
  4. 中国科学院近代物理研究所,兰州,730000
- 作者简介：
- 基金信息：
- DOI：10.11889/j.0253-3219.2014.hjs.37.100512
  CLC：
- Published：16 October 2014
- 稿件说明：
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WU Zhidan, GUO Bing, LI Zhihong, et al. Determination of 15N(n,r)16N astrophysical reaction rate via the (7Li,6Li) reaction[J]. Nuclear techniques, 2014, 37(10): 100512
DOI：

WU Zhidan, GUO Bing, LI Zhihong, et al. Determination of 15N(n,r)16N astrophysical reaction rate via the (7Li,6Li) reaction[J]. Nuclear techniques, 2014, 37(10): 100512 DOI： 10.11889/j.0253-3219.2014.hjs.37.100512.

摘要

在巨正则模型下，利用两相似反应系统的同质异位素产额比之差(Isobaric yield ratio difference

IBD)，研究中等质量余核化学势与反应系统的关联。结果表明，两相似反应系统的/T之差21/T对两反应系统双中质比(N/Z)21很敏感，说明/T对反应系统具有依赖性。同时发现，当(N/Z)21=1.17时，两反应系统不同余核的21/T趋于一个常数，说明在这两个系统中，利用IBD和同位旋标度方法获得的对称能信息更合理，且符合得更好。

Abstract

Background: Chemical properties of projectile residues are important in studying the symmetry energy using isobaric yield ratio (IYR) and isoscaling methods. Purpose: The correlation between chemical properties of intermediate mass residues and reaction systems is to be studied. It is hoped that the symmetry energy information can be extracted more precisely. Methods: In the framework of the grand-canonical ensemble theory

the /T difference between two heave-ion reactions

which was labeled as 21/T

was extracted by using isobaric yield ratio difference (IBD) method. Results: By comparing the 21/T among six different combinations 48Ca+9Be/40Ca+9Be

48Ca+9Be/58Ni+9Be

64Ni+9Be/40Ca+9Be

64Ni+9Be/58Ni+9Be

58Ni+9Be/ 40Ca+9Be

48Ca+9Be/ 64Ni+9Be

it was proved that /T depends on the reaction system. In different reactions

the values of /T were not fixed. When the double neutron-to-proton ratios (N/Z)21=1.17

21/T can be approximately a constant. Conclusion: Symmetry energy can be more reasonable in isoscaling and IBD methods

when double neutron-to-proton ratios (N/Z)21=1.17 between two similar reaction system.Cited

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GUO Bing

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School of Physics and Optoelectronics, South China University of Technology

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