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Broken scaling laws of the transition probabilities from jj to LS coupling transitions |
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| Authors: | Xiang Gao Xiao-Ying Han De-Ling Zeng Rui Jin Jia-Ming Li |
| Affiliation: | 1. Beijing Computational Science Research Center, Beijing 100084, China;2. Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;3. Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China;4. Department of Physics and Center for Atomic and Molecular Nanosciences, Tsinghua University, Beijing 100084, China;5. Collaborative Innovation Center of Quantum Matter, Beijing 100084, China |
| Abstract: | Accurate electromagnetic transition rates between the ground electronic configurations are important in diagnostic studies of planetary nebulae. Based on a “quasi-complete basis” set, we present large-scale multi-configuration Dirac–Fock calculations of the forbidden transition rates within the ground electronic configuration along the nitrogen-like isoelectronic sequence. The broken scaling laws of the transition probabilities from jj to LS coupling transitions are elucidated and found to be extensions of the well-known scaling laws discussed in the single electron case. The equivalent oscillator strength is very large for ions in high-Z regions and should play a crucial role in the cooling mechanism in astrophysics. |
| Keywords: | Atomic structure calculation Electromagnetic transition rate Scaling law |
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