分类: 物理学 >> 核物理学 提交时间: 2024-04-18
摘要: Based on the dinuclear system model, the calculated evaporation residue cross sections matched well with the current experimental results. The synthesis of superheavy elements Z = 121 was systematically studied through combinations of stable projectiles with Z = 21–30 and targets with half-lives exceeding 50 d. The influence of mass asymmetry and isotopic dependence on the projectile and target nuclei was investigated in detail. The reactions 254Es (46Ti, 3n) 297121 and 252Es (46Ti, 3n) 295121 were found to be experimentally feasible for synthesizing superheavy element Z = 121, with maximal evaporation residue cross sections of 6.619 and 4.123 fb at 219.9 and 223.9 MeV, respectively.
分类: 物理学 >> 核物理学 提交时间: 2023-09-04 合作期刊: 《核技术》
摘要: 超重核合成对于扩展核素版图、探索极限条件下原子核性质、理解核天体物理中的快中子俘获过程都有着重要意义,是核物理学研究的前沿领域。本文对重离子碰撞输运理论的发展现状和进展做了评述,介绍了几种具有代表性的输运模型,并介绍了基于输运理论和实验上合成超重核素的现状和最新研究进展,重点针对重离子熔合反应和多核子转移反应研究情况展开讨论,并对国际上新一代核科学大装置的进展进行了总结,介绍了未来国际上超重核合成的研究计划。