Electron shell and the alpha-decay
Sergey Yu. Igashov (1), Yury M. Tchuvil'sky (2) ((1) All-Russia, Research Institute of Automatics, Moscow, Russia, (2) Skobeltsyn Institute of, Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia)
TL;DR
This paper calculates how electron shells influence alpha-decay widths, considering barrier penetrability changes and reflection effects, finding the total impact to be below 1 percent for long-lived isotopes.
Contribution
It introduces a comprehensive calculation of electron shell effects on alpha-decay widths, including both barrier shape changes and reflection phenomena.
Findings
Total effect on decay width is below 1 percent for long-lived samples.
Both barrier shape change and reflection effects are equally significant.
Electron shells slightly modify alpha-decay probabilities.
Abstract
The ratio of the alpha-decay widths of a bare nucleus and the related atom is calculated. Both the change of the form and thus the penetrability of the potential barrier and the effect of reflection in the classically-allowed region appearing due to the electron shell are taken into account in the calculations of this ratio. The contribution of each of these two effects is of one and the same order of magnitude. For long-lived radioactive samples the values of the total effect turn out to be somewhat below 1 percent.
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Taxonomy
TopicsNuclear physics research studies · Radiation Detection and Scintillator Technologies · Nuclear Physics and Applications