Eur. Phys. J. D (2012) 66: 260
https://doi.org/10.1140/epjd/e2012-30321-0

Regular Article

Theoretical studies on level structures and transition properties of neptunium ions

Key Laboratory of Atomic and Molecular Physics Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, P.R. China

^a e-mail: dongcz@nwnu.edu.cn

Received: 22 May 2012
Received in final form: 13 July 2012
Published online: 11 October 2012

Abstract

Multiconfiguration Dirac-Fock (MCDF) method was employed to calculate the ionization potentials, ionic radii, excitation energies and oscillator strengths for neptunium ions. In the calculations, main valence correlation effects, Breit interaction and QED effects were taken into account. The good consistency with other available theoretical values demonstrates the validity of the present calculations. These theoretical results therefore can be used to predict some physicochemical properties of Np and its oxides.