Relativistic R-matrix calculations for L-shell photoionization cross sections of C II

• 来源期刊: 中国物理B（英文版）
• 关键词: photoionization cross section relativistic R-matrix method C II
• 年，卷（期）: 2018,（8）
• 页码范围: 222-228
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1056/27/8/083201

摘要

The photoionization cross section of the ground state 2s22p 2Po1/2 and the first excited state 2s22p2Po3/2 of C II ions are systematically calculated using the fully relativistic R-matrix code DARC. The detailed resonances are presented and identified for the photon energy ranging from threshold (24.38 eV) up to 41.5 eV where the L-shell (2p, 2s) photoionization process is dominant. In the calculations, the relativistic effect and electronic correlation effect are well considered. It is found that the relativistic effect is very important for the light atomic system CII, which accounts for experimentally observed fine structure resonance peaks. A careful comparison is made between the present results and the experimental values, and also other theoretical data available in the literature, showing that good agreement is obtained for the resonance peaks.