Eur. Phys. J. D 51, 313-317 (2009)
https://doi.org/10.1140/epjd/e2008-00276-x

Hyperfine induced 1s2s ¹S₀ → 1s^2 1S₀ M1 transition of He-like ions

¹ College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou, 730070, P.R. China
² Joint Laboratory of Atomic and Molecular Physics, NWNU & IMPCAS, Lanzhou, 730070, P.R. China
³ Nature, Environment, Society, Malmö University, Malmö, 20506, Sweden
⁴ Department of Physics, Vilnius Pedagogical University, Studentu 39, 08106 Vilnius, Lithuania
⁵ Institute of Theoretical Physics and Astronomy, A. Gostauto 12, 08106 Vilnius, Lithuania

Corresponding author: ^a dongcz@nwnu.edu.cn

Received: 12 September 2008
Revised: 24 November 2008
Published online: 9 January 2009

Abstract

Hyperfine induced 1s2s ¹S₀ → 1s^2 1S₀ 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.