Eur. Phys. J. D (2013) 67: 142
https://doi.org/10.1140/epjd/e2013-40062-1

Regular Article

Molecular hyperfine parameters in the 1 ³Σ_u⁺ and 1 ³Σ_g⁺ states of Li₂, Na₂, K₂ and Rb₂

¹ Department of Civil Engineering and Energy Technology, Oslo and Akershus University College of Applied Sciences, 0130 Oslo, Norway
² Department of Physics, University of Oslo, 0316 Oslo, Norway

^a e-mail: marius.lysebo@hioa.no

Received: 4 February 2013
Received in final form: 22 April 2013
Published online: 16 July 2013

Abstract

Magnetic hyperfine parameters have been computed for the 1   ³Σ_u⁺ and 1   ³Σ_g⁺ states of Li₂,Na₂,K₂ and Rb₂. The parameters were computed with MCSCF wavefunctions and the calculations were repeated for a series of internuclear distances. The results are compared with a recent observation of the hyperfine structure in Rb₂, and to the atomic hyperfine parameters. The available empirical data are reproduced with high accuracy. For the present systems, the molecular hyperfine parameters are largely determined by the corresponding atomic hyperfine interactions. The computed molecular parameters at the dissociation limit deviate at most 11% from the experimentally determined atomic ones.