Abstract
Photoionization cross sections and photoelectron angular distribution asymmetry parameters are calculated for the , and subshells of atomic barium as a test of the relativistic multiconfiguration Tamm-Dancoff (RMCTD) method. The shape resonance present in the near-threshold region of the subshell is studied in detail in the photoionization along with the , and subshells in the region of the thresholds, as the shape resonance strongly influences these subshells in its vicinity. The results are compared with available experiment and other many-body theoretical results in an effort to assess the capabilities of the RMCTD methodology. The electron correlations addressed in the RMCTD method give relatively good agreement with the experimental data, indicating that the important many-body correlations are included correctly.
- Received 9 December 2016
- Revised 28 January 2017
DOI:https://doi.org/10.1103/PhysRevA.95.033417
©2017 American Physical Society