Ab initio MCDHF calculations of the in and Tl electron affinities and their isotope shifts

作     者：Si, Ran Schiffmann, Sacha Wang, Kai Chen, Chong Yang Godefroid, Michel 

作者机构：Shanghai EBIT Lab Key Laboratory of Nuclear Physics and Ion-beam Application Institute of Modern Physics Department of Nuclear Science and Technology Fudan University Shanghai200433 China  Université libre de Bruxelles CP160/09 Brussels1050 Belgium Division of Mathematical Physics Department of Physics Lund University Box 118 LundSE-22100 Sweden Hebei Key Lab of Optic-electronic Information and Materials The College of Physics Science and Technology Hebei University Baoding071002 China 

出 版 物：《arXiv》 (arXiv)

年 卷 期：2021年

核心收录：

主　　题：Electron affinity 

摘      要：We report multiconfiguration Dirac-Hartree-Fock and relativistic configuration interaction calculations on the Thallium (Tl) electron affinity, as well as on the excited energy levels arising from the ground configuration of Tl−. The results are compared with the available experimental values and further validated by extending the study to its homologous, lighter element, Indium (In), belonging to Group 13 (III.A) of the periodic table. The calculated electron affinities of In and Tl, 383.4 and 322.8 meV, agree with the latest measurements by within 1%. Three bound states 3P0,1,2 are confirmed in the 5s25p2 configuration of In− while only the ground state 3P0 is bound in the 6s26p2 configuration of Tl−. The isotope shifts on the In and Tl electron affinities are also estimated. The E2/M1 intraconfiguration radiative transition rates within 5s25p2 3P0,1,2 of In− are used to calculate the radiative lifetimes of the metastable 3P1,2 levels. Copyright © 2021, The Authors. All rights reserved.