Eur. Phys. J. D (2017) 71: 128
https://doi.org/10.1140/epjd/e2017-70828-0

Regular Article

Theoretical study of the dielectronic recombination process of Li-like Xe⁵¹⁺ ions^*

¹ Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, P.R. China
² Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, P.R. China
³ University of Chinese Academy of Sciences, Beijing 100049, P.R. China

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

Received: 30 December 2016
Received in final form: 24 March 2017
Published online: 25 May 2017

Abstract

The dielectronic recombination of Li-like Xe⁵¹⁺ (2s) ions was studied using the flexible atomic code based on the relativistic configuration interaction method. The resonance energies, radiative and autoionization rates, and resonance strengths were calculated systematically for the doubly excited states (2p_1/2nl_j)_J(n = 18−32) and (2p_3/2n′l_j)_J(n′ = 9−27) of Be-like Xe⁵⁰⁺ ions. For the higher Rydberg resonance states with n ≥ 33 and n′ ≥ 28, the resonance energies and strengths were obtained by extrapolation based on quantum defect theory. The theoretical rate coefficients, covering the center-of-mass energy range 0–505 eV, are in a better agreement with the experimental results measured at the heavy-ion storage ring ESR than the Multi-Configuration Dirac-Fock calculations, especially at the resonance energy range close to the series limits.