Alpha-decay for heavy nuclei in the ground and isomeric states

Alpha-decay for heavy nuclei in the ground and isomeric states
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重核在基态和异构态的阿尔法衰变

DOI:
10.1016/j.nuclphysa.2009.10.082
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发表时间:
2010-01
期刊:
影响因子:
1.4
通讯作者:
Li, Junqing
Li, Junqing
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Dong, Jianmin;Zhang, Hongfei;Wang, Yanzhao;Zuo, Wei;Li, Junqing

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本文用WKB近似和Royer公式计算了基态和同质异能态原子核的α衰变半衰期。在广义液滴模型(GLDM)中确定了准分子形状路径中的势垒,在该模型中引入了离心势能来研究不利的α衰变。计算结果与实验数据的一致性表明了用广义液滴模型研究同质异能态α衰变的可靠性。我们发现,在α衰变中,同分异构态和基态的预成几率一般没有显著差异。此外,我们还考虑了离心势垒的作用,推广了Royer的α衰变公式,并对同分异构体的α衰变半衰期进行了预测。最后讨论了角动量转移和Q{sub a} alpha对α衰变半衰期的影响。
The alpha-decay half-lives of nuclei in the ground states and isomeric states have been calculated within the WKB approximation and Royer's formulas. The barrier in the quasimolecular shape path is determined within a generalized liquid drop model (GLDM), in which the centrifugal potential energy has been introduced to study the unfavored alpha-decay. The agreement between the calculated results and experimental data indicates the reliability of studying alpha-decay of isomeric states with the generalized liquid drop model. We find that their is no significant difference of preformation probability between isomeric states and the corresponding ground states generally in favored alpha-decay. Additionally, we extended Royer's formulas by taking account of the role of centrifugal barrier to study the unfavored alpha-decay, and some predicts on the alpha-decay half-lives of isomers are made. Finally, the effects of angular momentum transfer and Q{sub a}lpha on alpha-decay half-life have been discussed.
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发表时间: 2004-01
期刊: Nuclear Physics
影响因子: --
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