Photoionization Time delay in atomic Barium

[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.

[发布机构] 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