Energy levels, wavefunction compositions and electric dipole transitions in neutral Ca

摘要: A configuration-interaction approach, based on the use of B-spline basis sets combined with a model potential including monoelectronic and dielectronic core polarization effects, is employed to calculate term energies wavefunctions for neutral Ca. Results are reported singlet triplet bound states, some quasi-bound states above lowest ionization limit, angular momentum up L = 4. Comparison experiment other theoretical results shows that this method yields most accurate energy values Ca obtained date. Wavefunction compositions, necessary labelling levels, effects semi-empirical potentials discussed, as recent identifications doubly-excited states. It shown taking into account changes terms in significantly, general by few hundred cm-1, effect decreasing rapidly higher For Rydberg n7 accuracy often better than cm-1. series members (or perturbers) pronounced 3d character error can reach 150 The used oscillator strengths lifetimes number these compared existing measurements. agreement good but points need improved