Oscillator strengths for spin-changing P–D transitions in He I including the effect of a finite nuclear mass and intermediate coupling
| Autor: | Gordon W. F. Drake, Donald C. Morton |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Anomalous magnetic dipole moment 010308 nuclear & particles physics General Physics and Astronomy chemistry.chemical_element Perturbation (astronomy) Electron 01 natural sciences Dipole chemistry 0103 physical sciences Atomic physics 010306 general physics Spectroscopy Relativistic quantum chemistry Helium Energy matrix |
| Zdroj: | Canadian Journal of Physics. 95:828-832 |
| ISSN: | 1208-6045 0008-4204 |
| DOI: | 10.1139/cjp-2016-0890 |
| Popis: | We have calculated the electric dipole (E1) oscillator strengths and spontaneous decay rates for 12 spin-changing P–D transitions of atomic helium. We included the effects of the finite nuclear mass and the anomalous magnetic moment of the electron. The specific transitions for 4He are [Formula: see text] and [Formula: see text] with n = 2, 3, 4 and n′ = 3, 4. To include the effects of intermediate coupling between pure LS and jj, we used the Breit formulation for the spin–orbit and spin–other-orbit operators and combined the results of the exact diagonalization of the 2 × 2 energy matrix with pseudostate expansions to perform the perturbation sums over intermediate states. We calculated both the length and velocity gauges as a check on numerical accuracy and the validity of the transition operators. |
| Databáze: | OpenAIRE |
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