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

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.
Authors:
 [1] ;  [2]
  1. D.I. Mendeleev Institute for Metrology (VNIIM) (Russian Federation)
  2. National Research Center Kurchatov Institute, Petersburg Nuclear Physics Institute (Russian Federation)
Publication Date:
OSTI Identifier:
22471990
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Atomic Nuclei; Journal Volume: 78; Journal Issue: 9; Other Information: Copyright (c) 2015 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ADIABATIC PROCESSES; ALPHA DECAY; ALPHA PARTICLES; COMPARATIVE EVALUATIONS; ELECTRONS; NUCLEAR STRUCTURE; NUCLEI; PROBABILITY; SHELL MODELS; STORAGE RINGS