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Experimental aspects of the adiabatic approach in estimating the effect of electron screening on alpha decay

  • Nuclei
  • Theory
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Abstract

Special features of the effect of the electron shell on alpha decay that have important experimental implications are studied within the adiabatic approach. The magnitude of the effect is about several tenths of a percent or smaller, depending on the transition energy and on the atomic number. A dominant role of inner shells is shown: more than 80% of the effect is saturated by 1s electrons. This circumstance plays a crucial role for experiments, making it possible to measure this small effect by a difference method in the same storage rings via a comparison of, for example, decay probabilities in bare nuclei and heliumlike ions. The reasons behind the relative success and the applicability limits of the frozen-shell model, which has been used to calculate the effect in question for more than half a century, are analyzed. An interesting experiment aimed at studying charged alpha-particle states is proposed. This experiment will furnish unique information for testing our ideas of the interplay of nonadiabatic and adiabatic processes.

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Authors and Affiliations

  1. D.I. Mendeleev Institute for Metrology (VNIIM), Moskovskii pr. 19, St. Petersburg, 190005, Russia

    F. F. Karpeshin

  2. Petersburg Nuclear Physics Institute, National Research Center Kurchatov Institute, Gatchina, 188300, Russia

    M. B. Trzhaskovskaya

Authors
  1. F. F. Karpeshin
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  2. M. B. Trzhaskovskaya
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Correspondence to F. F. Karpeshin.

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Original Russian Text © F.F. Karpeshin, M.B. Trzhaskovskaya, 2015, published in Yadernaya Fizika, 2015, Vol. 78, No. 12, pp. 1055–1063.

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Karpeshin, F.F., Trzhaskovskaya, M.B. Experimental aspects of the adiabatic approach in estimating the effect of electron screening on alpha decay. Phys. Atom. Nuclei 78, 993–1000 (2015). https://doi.org/10.1134/S1063778815090082

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