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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:吴志丹,女,1989年出生,2014年于山西师范大学获硕士学位,粒子物理与原子核物理" ]
纸质出版日期:2014-10-16
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吴志丹, 郭 冰, 李志宏, 等. 利用(7Li,6Li)反应测量15N(n,r)16N天体物理反应率[J]. 核技术, 2014,37(10):100512
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
吴志丹, 郭 冰, 李志宏, 等. 利用(7Li,6Li)反应测量15N(n,r)16N天体物理反应率[J]. 核技术, 2014,37(10):100512 DOI: 10.11889/j.0253-3219.2014.hjs.37.100512.
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.
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。
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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