Abstract

The multinucleon transfer process in the reaction ²³⁸U + ²⁵¹Cf is investigated by the dinuclear system model with GEMINI++ code. The time evolution of the fragment probability is studied. For the fragments with larger proton number, the time needed to reach the maximum probability is larger. The isotopic distributions become wider at larger evolution time, and more neutron-rich and proton-rich nuclei can be produced. On the neutron-rich side, the ΔU values becomes higher at larger incident angular momentum, resulting in lower cross sections of neutron-rich nuclei. New neutron-rich isotopes with Z = 98–104 are produced with cross sections larger than 1 nb. Three unknown Db isotopes and two unknown Sg isotopes are generated with cross sections larger than 1 pb.

中文翻译：

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多核子转移反应238 U + 251 Cf中Z = 98–106的同位素的产生

摘要

通过双核系统模型用GEMINI ++代码研究了²³⁸ U + ²⁵¹ Cf反应中的多核子转移过程。研究了碎片概率的时间演化。对于质子数较大的碎片，达到最大概率所需的时间较长。同位素的分布随着演化时间的延长而变宽，并且可以产生更多的富中子和富质子的核。在富中子侧，在较大的入射角动量下，ΔU值变高，导致富中子核的横截面较小。带有Z的新型中子富集同位素= 98–104的横截面大于1 nb。产生了三个未知的Db同位素和两个未知的Sg同位素，其截面大于1 pb。