Hyperfine induced ${\sf 1 s}{\sf 2 s}\ ^{\sf 1}$ S $_{\sf 0} \rightarrow {\sf 1 s}^{\sf 2}\ ^{\sf 1}$ S0 M1 transition of He-like ions

Abstract

Hyperfine induced \(1s2s ^1\)S\(_0 \rightarrow 1s^2 ^1\)S0 M1 transition probabilities of He-like ions have been calculated from relativistic configuration interaction wavefunctions including the frequency independent Breit interaction and QED effects. Present results for 151Eu and 155Gd are in good agreement with previous calculations [L.N. Labzowsky et al., Phys. Rev. A 63, 054105 (2001)]. Electronic data are given in terms of a general scaling law in Z that, given isotopic nuclear spin and magnetic moment, allows hyperfine induced decay rates to be estimated for any isotope. The results should be helpful for future experimental investigations on QED and parity non-conservation effects.