Photoionization of the ground and first two metastable levels for Sc III: Configuration-interaction and relativistic effects
- National Astronomical Observatories, Chinese Academy of Sciences, Datun Road 20A, Chaoyang, Beijing 100012, People's Republic of China (China)
- Department of Applied Physics, National University of Defense Technology, Changsha 410073, People's Republic of China (China)
The photoionization cross section of the ground ([Ne]3s{sup 2}3p{sup 6}3d {sup 2}D{sub 3/2}) and first two metastable ([Ne]3s{sup 2}3p{sup 6}3d {sup 2}D{sub 5/2} and [Ne]3s{sup 2}3p{sup 6}4s {sup 2}S{sub 1/2}) levels of potassiumlike Sc III have been studied using fully relativistic R-matrix method. To show the effects of configuration interaction on the cross section, we first perform a nonrelativistic R-matrix calculation. The detailed structures and resonances of the cross section obtained by the fully relativistic method in the region of 3p{yields}3d and 3p{yields}4s resonances are described and analyzed in some detail. The positions, autoionization widths, and oscillator strengths of some prominent resonances are determined. The calculated cross section is compared with a recent experiment [S. Schippers et al., Phys. Rev. Lett. 89, 193002 (2002)]. The resonance energies and intensities predicted by the fully relativistic calculations agree well with the experiment, especially for the 3p{yields}4s resonances in the region of lower photon energy, while it is not so satisfactory for the nonrelativistic calculations. Our results show that not only adequate configuration interaction, particularly the 3p{sup 3}{yields}3d{sup 3} core-valence correlations, but also relativistic effects should be carefully included in the calculation to obtain a good agreement with the experiment.
- OSTI ID:
- 20640067
- Journal Information:
- Physical Review. A, Vol. 68, Issue 2; Other Information: DOI: 10.1103/PhysRevA.68.022714; (c) 2003 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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