Eur. Phys. J. D (2017) 71: 113
https://doi.org/10.1140/epjd/e2017-80023-0

Regular Article

On the hyperfine structure of the triplet n³S-states of the four-electron atoms and ions

¹ ITAMP, Harvard-Smithonian Center for Astrophysics, MS 14, 60 Garden Street, Cambridge MA 02138-1516, USA
² Department of Applied Mathematics, University of Western Ontario, 1151 Richmond Street, London, Ontario N6H 5B7, Canada

^a e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Received: 11 January 2017
Received in final form: 3 March 2017
Published online: 18 May 2017

Abstract

Hyperfine structures of the triplet n³S-states in the four-electron Be-atom(s) and Be-like ions are considered. It is shown that to determine the hyperfine structure splitting in such atomic systems one needs to know the triplet electron density at the central atomic nucleus ρ_T(0). We have developed the procedure which allows allows one to determine such an electron density ρ_T(0) for arbitrary four-electron atoms and ions.