Improved effective liquid drop model for α-decay half-lives

被引：19
作者：
Cui, J. P. [1 ,2 ]
Gao, Y. H. [1 ,2 ]
Wang, Y. Z. [1 ,2 ,3 ]
Gu, J. Z. [3 ]
机构：
[1] Shijiazhuang Tiedao Univ, Dept Math & Phys, Shijiazhuang 050043, Hebei, Peoples R China
[2] Shijiazhuang Tiedao Univ, Inst Appl Phys, Shijiazhuang 050043, Hebei, Peoples R China
[3] China Inst Atom Energy, POB 275 10, Beijing 102413, Peoples R China
来源：
NUCLEAR PHYSICS A | 2022年 / 1017卷
基金：
中国国家自然科学基金;
关键词：
alpha-decay; Half-life; Effective liquid drop model; Superheavy nuclei; CLUSTER RADIOACTIVITY; SPONTANEOUS FISSION; SUPERHEAVY NUCLEI; DISCOVERY; EMISSION; ELEMENTS; SEARCH; MASSES; CHARGE;
D O I：
10.1016/j.nuclphysa.2021.122341
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
The effective liquid drop model (ELDM) is improved by introducing an accurate nuclear charge radius formula and an analytic expression of the effective assaulting frequency. Within the improved effective liquid drop model (IMELDM), the alpha-decay half-lives of 421 nuclei which have been measured in experiment are calculated. It is shown that the accuracy of the IMELDM is improved evidently compared to its predecessor. Meanwhile, by focusing on the superheavy nuclei (SHN), the alpha-decay half-lives of SHN are investigated within the IMELDM. It is found that the experimental alpha-decay half-lives of 80 SHN are reproduced well. Then, within the IMELDM the alpha-decay half-lives of the Z=118-121 isotopes are predicted by inputting the alpha-decay energies (Q(alpha)) extracted from the Weizsacker-Skyrme-4 (WS4) mass table. At last, the competition between the alpha-decay and spontaneous fission (SF) of the SHN of the N=178 alpha-decay chains is studied in detail, which may be useful for searching for the new SHN in future. (c) 2021 Elsevier B.V. All rights reserved.
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页数：12
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