A semiempirical evaluation of half-life of <mml:msup><mml:mrow>146</mml:msup>Sm isotope

被引：1

作者：

Tavares, O. A. P. ^{[1
]}

Terranova, M. L. ^{[2
]}

机构：

[1] Ctr Brasileiro Pesquisas Fis CBPF MCTI, Rua Dr Xavier Sigaud 150, BR-22290180 Rio De Janeiro, RJ, Brazil

[2] Univ Roma, Dipartimento Sci & Tecnol Chim, via Ric Scient s-n, I-00133 Rome, Italy

来源：

MODERN PHYSICS LETTERS A | 2023年 / 38卷 / 24N25期

关键词：

Alpha decay; Sm-146; isotope; half-life determination; semiempirical model; ALPHA-DECAY; NUCLEAR-DEFORMATION; LIVES; EMISSION; FISSION; DENSITY;

D O I：

10.1142/S0217732323501158

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A physical model that can quantitatively describe the spontaneous alpha-particle emission mechanism from atomic nuclei in the spherical nucleus approximation has been applied to the evaluation of the half-life of the 146Sm nuclide. The one-parameter, semi-empirical model used in this study has been developed in the frame of a quantum mechanical mechanism of alpha tunnelling through a potential barrier, taking into account centrifugal and overlapping effects. The calculation procedure yielded a value of 145.1 +/- 0.3Myr for the half-life of the extinct 146Sm isotope. This value, even if in disagreement with the few old measurements performed on the artificially obtained 146Sm, is thought to represent the most reliable indication of the alpha-decay rate for such challenging nuclide.

引用

页数：10

共 41 条

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