Shakeoff Effect on the Rate of Neutrinoless Double-Electron Capture in Er

Traditionally, neutrinoless double-electron capture is treated as a resonance process. The probabilities for shakeoff followed by electron-shell ionization occurring in the case of Er are calculated in the present study. The inclusion of the shakeoff effect in the calculation removes the resonance r...

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Bibliographic Details
Published inPhysics of atomic nuclei Vol. 85; no. 5; pp. 474 - 479
Main Authors Karpeshin, F. F., Trzhaskovskaya, M. B.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.10.2022
Springer
Springer Nature B.V
Subjects
Beta decay
Electron capture
Electrons
ELEMENTARY PARTICLES AND FIELDS/Theory
Ionization
Mathematical analysis
Particle and Nuclear Physics
Physics
Physics and Astronomy
Resonance
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Summary:Traditionally, neutrinoless double-electron capture is treated as a resonance process. The probabilities for shakeoff followed by electron-shell ionization occurring in the case of Er are calculated in the present study. The inclusion of the shakeoff effect in the calculation removes the resonance requirement, leading to an increase in the capture rate. The contribution of this new mechanism increases the capture rate by a factor of 5.6 in relation to that based on the traditional resonance-fluorescence mechanism. The contribution of the former also increases the probability for electron capture from higher lying shells, and one should take this into account in experimental investigations. Moreover, the list of nuclear candidates for performing experiments might become wider upon taking shakeoff into account.
ISSN:1063-7788
1562-692X
DOI:10.1134/S1063778822050064