A calculation model to half-life estimate of two-proton radioactive decay process

被引：20

作者：

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

Medeiros, E. L. ^{[1
]}

机构：

[1] MCTIC, CBPF, Rua Dr Xavier Sigaud 150, BR-22290180 Rio De Janeiro, RJ, Brazil

来源：

EUROPEAN PHYSICAL JOURNAL A | 2018年 / 54卷 / 04期

关键词：

ELECTROMAGNETIC FORM-FACTORS; PROTON DRIP-LINE; MOMENTUM-TRANSFER; NUCLEI; STABILITY; EMISSION; ISOTOPES; MASSES; SYSTEM; FE-45;

D O I：

10.1140/epja/i2018-12495-4

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：

Partial half-life of the radioactive decay by the two-proton emission mode has been estimated for proton-rich nuclei of mass number 18 < A < 68 by a model based on the quantum mechanical tunneling mechanism through a potential barrier. The Coulomb, centrifugal and overlapping contributions to the barrier have been considered within the spherical nucleus approximation. The present calculation method has been shown to be adequate in reproducing the existing experimental half-life data for Mg-19, Fe-45, Ni-48, and Zn-54 2p-emitter nuclides within a factor six. For Kr-67 parent nucleus the calculated partial 2p-decay half-life has been found to be ten times greater than the recent, unique measured value at RIKEN Nishina Center. Prediction for new, yet unmeasured cases of two-proton radioactivity are also reported.

引用

页数：11

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