Nuclear Techniques ›› 2014, Vol. 37 ›› Issue (10): 100512-100512.doi: 10.11889/j.0253-3219.2014.hjs.37.100512


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

WU Zhidan1 GUO Bing1 LI Zhihong1 LI Yunju1 SU Jun1 PANG Danyang2 YAN Shengquan1 LI Ertao3 BAI Xixiang1 DU Xianchao1 FAN Qiwen1 GAN Lin1 HE Jianjun4 JIN Sunjun1 JING Long1 LI Long4 LI Zhichang1 LIAN Gang1 LIU Jiancheng1 SHEN Yangping1 WANG Youbao1 YU Xiangqing4 ZENG Sheng1 ZHANG Liyong4 ZHANG Weijie1 LIU Weiping1   

  1. 1(China Institute of Atomic Energy, Beijing 102413, China) 2(School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China) 3(College of Physics Science and Technology, Shenzhen University, Shenzhen 518060, China) 4(Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China)
  • Received:2014-04-23 Revised:2014-05-15 Online:2014-10-10 Published:2014-10-16


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.

Key words: Transfer reaction, Distorted wave Born approximation (DWBA), Spectroscopic factors, Reaction rate