Electron-impact excitation of the beryllium isoelectronic sequence

Abstract

An analytic atomic independent-particle model potential adjusted to experimental energy levels is used to generate wave functions for the excited states of Be I, B II, C III, N IV, and O V. Using these wave functions in conjunction with the Born approximation and the LS-coupling scheme, the authors calculate optical oscillator strengths, generalized oscillator strengths, and total cross sections for excitations from the 2s/sup 2/(/sup 1/S/sub 0/) ground state. The results are compared with experimental ones and other calculations. Regularities and systematic trends along the isoelectronic sequence are discussed.