Abstract
Bevelacqua Resources, 7531 Flint Crossing Circle SE, Owens Cross Roads, AL 35763 USA bevelresou@aol.com In neutron star mergers, neutron excess nuclei and the r-process are important factors governing the production of heavier nuclear systems. A single-particle model evaluation of argon nuclei suggests that the heaviest Z = 18 nucleus will have mass 69 with filling of the 3s1/2 neutron shell. A = 51 – 69 argon isotopes have limited experimental half-life data, but the model predicts beta decay half-lives in the range of 0.473 – 20.3 ms. Based on previous calculations for Z = 9 - 17, 20, 26, and 30 systems and comparisons to the 51Ar - 56Ar, 58Ar, and 60Ar calculations, summarized in the Japanese Nuclear Data Compilation, the single-particle model results likely overestimate the half-lives of A = 51 – 69 neutron excess argon nuclei.
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