Production mechanism of new neutron-rich heavy nuclei inthe Xe-136+Pt-198 reaction
Production mechanism of new neutron-rich heavy nuclei inthe Xe-136+Pt-198 reaction
复制标题
Xe-136 Pt-198反应中新型富中子重核的产生机制
DOI：
10.1016/j.physletb.2017.11.060
复制
发表时间：
2018
影响因子：
4.4
通讯作者：
Zhang Feng Shou
中科院分区：
文献类型：
--
作者：
Li Cheng;Wen Peiwei;Li Jingjing;Zhang Gen;Li Bing;Xu Xinxin;Liu Zhong;Zhu Shaofei;Zhang Feng Shou
用改进的量子分子动力学模型研究了ELab=7.98 MeV/核子时Xe 136+198铂的多核子转移反应。通过分析碰撞过程中碎片的角分布和能量耗散过程，研究了准弹性、深非弹性和准裂变碰撞机制。结合IMQMD模型和Gemini程序的计算，较好地再现了弹状碎片的测量同位素产生截面。计算了199铂、203铂和208铂的类靶碎片和双微分截面的同位素产生截面。结果表明，通过深非弹性碰撞机制可以产生约50个新的丰中子核，产生截面从10−3到10−6 mb。这些新丰中子核的相应发射角和动能分别位于40∘-60∘和100-200 MeV。
The multinucleon transfer reaction of Xe 136+ 198 Pt at E lab= 7.98 MeV/nucleon is investigated by using the improved quantum molecular dynamics model. The quasielastic, deep-inelastic, and quasifission collision mechanisms are studied via analyzing the angular distributions of fragments and the energy dissipation processes during the collisions. The measured isotope production cross sections of projectile-like fragments are reasonably well reproduced by the calculation of the ImQMD model together with the GEMINI code. The isotope production cross sections for the target-like fragments and double differential cross sections of 199 Pt, 203 Pt, and 208 Pt are calculated. It is shown that about 50 new neutron-rich heavy nuclei can be produced via deep-inelastic collision mechanism, where the production cross sections are from 10− 3 to 10− 6 mb. The corresponding emission angle and the kinetic energy for these new neutron-rich nuclei locate at 40∘–60∘ and 100–200 MeV, respectively.