Spin-mixed doubly excited resonances in Ca and Sr spectra
- Graduate Institute of Applied Science and Engineering, Fu Jen Catholic University, Taipei, Taiwan 242 (China)
- Department of Physics, Fu Jen Catholic University, Taipei, Taiwan 242 (China)
- Department of Physics, National Central University, Chungli, Taiwan 32054 (China)
- Department of Physics and Astronomy, University of Southern California, Los Angeles, California 90089-0484 (United States)
We present a joint theoretical and experimental investigation to demonstrate explicitly how the combined spin-dependent interaction and the configuration interaction may affect the mixing of different spin states along various doubly excited autoionization series for Ca and Sr as energy increases across several ionization thresholds. In particular, our study has identified the inversion of energy levels between members of a number of multiplets, i.e., in contrast to the Hund's rules, due to the presence of perturber from other overlapping resonance series. We are also able to demonstrate the beginning of the breakdown of the LS coupling for resonance series corresponding to electron configurations with higher orbital angular momenta and those above the third ionization threshold.
- OSTI ID:
- 21316395
- Journal Information:
- Physical Review. A, Vol. 80, Issue 4; Other Information: DOI: 10.1103/PhysRevA.80.042509; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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