Superposition of Configurations and Atomic Oscillator Strengths - Boron Isoelectronic Sequence

Abstract

Oscillator strengths have been computed for transitions between a number of low-lying levels in B I and Ne VI. The wave functions were computed by the method of superposition of configurations, utilizing the pseudonatural orbital technique to accelerate convergence. The asymptotic limiting large-$Z$ $f$ values were also computed, using the nuclear charge perturbation expansion. Together with previous theoretical data from C II, these results have been used to make a graphical study of the $f$-value behavior for these transitions along the isoelectronic sequence. Comparisons were made between experiment and the predictions of the Hartree-Fock and charge-expansion methods as well as the present calculations. Finally, these theoretical curves were used to predict individual $f$ values for each member of the sequence through $Z=15\mathrm{}$ (P XI).