Electron Capture and Bound-State β Decays in Ions and Plasma

2024/07/01 by Bharat Mishra, Angelo Pidatella, Mishra, Bharat +7
Chemistry · Engineering · Physics and Astronomy · #Atomic Physics (physics.atom-ph) #Atomic and Molecular Physics #FOS: Physical sciences #Mass Spectrometry Techniques and Applications #Nuclear Theory (nucl-th) #Particle accelerators and beam dynamics #Plasma Physics (physics.plasm-ph)

paper · pdf · doi:10.48550/arxiv.2407.01787

openalex publication_date 2024/07/01 · openalex created_date 2024/07/06 · openalex updated_date 2026/07/30

Abstract

We present a new theory describing the variation of electron capture and bound-state β-decays in atomic ions and (non) local thermodynamic equilibrium ((N)LTE) plasmas. We adopt the Takahashi-Yokoi nuclear model with added corrections to first calculate the decay rate for each atomic configuration of the isotope, and then evaluate the in-plasma decay rate by combining them with the charge state distribution (CSD) consistent with plasma density and temperature. Our approach expands the thermodynamic parameter space in which in-plasma β-decays can be studied, opening the possibility to validate the model in low-density laboratory magnetoplasmas before application to stellar nucleosynthesis. The model is explained using ⁷Be, and then applied to higher mass isotopes such as ¹⁴⁰Pr^0+,57+,58+, ¹⁴²Pm^0+,59+,60+ and ¹⁶³Dy⁶⁶⁺. Our model is therefore amenable to isotopes in a wide range of masses, in both single charge state or in a plasma-generated CSD.

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