Photoionization Time delay in atomic Barium

30th International Conference on Photonic, Electronic, and Atomic Collisions

Ganesan, Aarthi^1 ; Deshmukh, Pranawa C.^2,3 ; Kheifets, Anatoli S.^4 ; Dolmatov, Valeriy K.^5 ; Manson, Steven T.^6

Department of Physics, CPGS, Jain University, Bengaluru

560011, India^1

Department of Physics, Indian Institute of Technology Tirupati, Tirupati

517506, India^2

Department of Physics, Indian Institute of Science Education and Research, Tirupati

517507, India^3

Research School of Physics and Engineering, Australian National University, Canberra

ACT

0200, Australia^4

Department of Physics and Earth Science, University of Northern Alabama, Florence

AL

35632, United States^5

Department of Physics and Astronomy, Georgia State University, Atlanta

GA

30301, United States^6

关键词: Many body;    Relativistic random-phase approximation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/875/3/022021/pdf
DOI  :  10.1088/1742-6596/875/3/022021

来源: IOP

【 摘 要 】

Synopsis Wigner-Eisenbud-Smith (WES) photoionization time delay is calculated for atomic barium 5s subshell using Relativistic Random Phase Approximation (RRPA), RRPA with relaxation (RRPA-R) and the Relativistic Multi-Configuration Tamm-Dancoff (RMCTD) techniques. Electron correlations are treated differently in different many body methods; the WES time delay is sensitive to these differences. The present study is aimed at determining the suitability of various many-body methods for the study of the WES time-delay.