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1. 河南师范大学 物理与电子工程学院,新乡,453007
2. 中国科学院上海应用物理研究所 嘉定园区,上海,201800
3. 河南师范大学 新联学院,新乡,453007
[ "作者简介:王闪闪,女,1988年出生,2012年毕业于河南师范大学,现为河南师范大学粒子物理与原子核物理研究所硕士研究生" ]
[ "通讯作者: 马春旺,E-mail: machunwang@126.com E-mail:machunwang@126.com" ]
纸质出版日期:2014-10-16
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王闪闪, 马春旺, 曹喜光, 等. 利用同质异位素产额比方法研究重离子核反应中等质量余核的化学势[J]. 核技术, 2014,37(10):100515
WANG Shanshan, MA Chunwang, CAO Xiguang, et al. Chemical properties of intermediate mass residue with isobaric yield ratio method in heavy-ion reaction[J]. Nuclear techniques, 2014, 37(10): 100515
王闪闪, 马春旺, 曹喜光, 等. 利用同质异位素产额比方法研究重离子核反应中等质量余核的化学势[J]. 核技术, 2014,37(10):100515 DOI: 10.11889/j.0253-3219.2014.hjs.37.100515.
WANG Shanshan, MA Chunwang, CAO Xiguang, et al. Chemical properties of intermediate mass residue with isobaric yield ratio method in heavy-ion reaction[J]. Nuclear techniques, 2014, 37(10): 100515 DOI: 10.11889/j.0253-3219.2014.hjs.37.100515.
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Dm/T之差Dm21/T对两反应系统双中质比(N/Z)21很敏感,说明Dm/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Dm21/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 Dm/T difference between two heave-ion reactions
which was labeled as Dm21/T
was extracted by using isobaric yield ratio difference (IBD) method. Results: By comparing the Dm21/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 Dm/T depends on the reaction system. In different reactions
the values of Dm/T were not fixed. When the double neutron-to-proton ratios (N/Z)21=1.17
Dm21/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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