探究在质子蒸发道中产生超重核的可行性
Exploring the Feasibility of Producing Superheavy Nuclei in the Proton Evaporation Channel
李路琦 1张根 1蔡军军 1周立林 1张丰收2
作者信息
- 1. 广西大学物理科学与工程技术学院,南宁 530004
- 2. 北京师范大学核科学与技术学院,北京 100875;北京辐射中心,北京 100875;兰州重离子加速器国家实验室理论核物理中心,兰州 730000
- 折叠
摘要
在双核系统(DNS)模型下系统地研究了质子蒸发道中产生超重核的可行性.由于Z=114质子壳层的存在,在质子蒸发道中合成F1同位素是合适的.在本工作中只考虑了先蒸发一个质子,然后蒸发n个中子的情况,其他情况由于截面太小而被忽略.与50Ti+243Np和54Cr+239Pa反应相比,未知290,291F1同位素在38S+255Es反应中的产生截面最高,最大截面分别为1.1和15.1 pb.未来随着放射性束设施的升级,42S+254Es是接近稳定岛的一个有希望的弹靶体系,该反应中291-294F1的产生截面估计分别为3.2、6.0、4.0和0.1 pb.
Abstract
The feasibility of producing superheavy nuclei in proton evaporation channels was systematically studied within the dinuclear system(DNS)model.Due to the Z=114 proton-shell,one can synthesize Fl isotopes in proton evaporation channels.We only considered the case of evaporating one proton first and then n neutrons in this work,other cases were ignored due to the small cross-section.The production cross sections of unknown isotopes 290,291F1 in 38S+255Es reaction are the highest compared with 50Ti+243Np and 54Cr+239Pa reactions,and the maximum cross sections are 1.1 and 15.1 pb,respectively.42S+254Es is a promising candidate to approach the island of stability as the radioactive beam facilities are upgraded in the future,and the production cross sections of 291-294F1 in that reac-tion are estimated to be 3.2,6.0,4.0,and 0.1 pb,respectively.
关键词
双核系统模型/超重核素/熔合反应/质子蒸发道/产生截面Key words
DNS model/superheavy nuclei/fusion reaction/proton evaporation channel/production cross section引用本文复制引用
基金项目
广西自然科学基金资助项目(2022GXNSFBA035549)
出版年
2024
NETL
NSTL
万方数据