Decay Characteristics of Neutron Excess Potassium Nuclei

Qeios Pub Date : 2024-03-12 DOI:10.32388/rbfgk2
J. Bevelacqua
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Abstract

Bevelacqua Resources, 7531 Flint Crossing Circle SE, Owens Cross Roads, AL 35762 USA bevelresou@aol.com      In neutron star mergers, neutron excess nuclei and the r-process are important factors governing the production of heavy nuclear systems. A single-particle model evaluation of potassium nuclei suggests that the heaviest Z = 19 nucleus will have mass 69 with filling of the 1g9/2 neutron shell. A = 55 – 69 potassium isotopes have limited experimental half-life data, but the model predicts beta decay half-lives in the range of 0.315 – 9.23 ms. Based on previous calculations for Z = 9 - 18, 20, 26, and 30 systems and comparisons to the 55K – 59K, 61K, and 63K calculations, summarized in the Japanese Nuclear Data Compilation, the single-particle model results likely overestimate the half-lives of A = 55 – 69 neutron excess potassium nuclei. KEYWORDS: Nucleosynthesis, Neutron Excess Potassium Nuclei, Beta Decay, Nuclear Structure
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中子过剩钾核的衰变特性
Bevelacqua Resources, 7531 Flint Crossing Circle SE, Owens Cross Roads, AL 35762 USA bevelresou@aol.com 在中子星合并中,中子过剩核和r过程是产生重核系统的重要因素。对钾核的单粒子模型评估表明,最重的 Z = 19 核在填满 1g9/2 中子壳后质量为 69。A = 55 - 69钾同位素的实验半衰期数据有限,但模型预测β衰变半衰期在0.315 - 9.23毫秒之间。根据以前对 Z = 9 - 18、20、26 和 30 系统的计算,以及与日本核数据汇编中总结的 55K - 59K、61K 和 63K 计算的比较,单粒子模型的结果很可能高估了 A = 55 - 69 中子过剩钾核的半衰期。
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