2001 journal article

Anger width and branching ratios for Be-like 1s2s(2)2p P-3(0) and 1s2s2p(2) S-3,P-3,D-3 resonances and photoionization of Be from 1s(2)2s2p P-3(0)


By: S. Lin‚ÄČ*, C. Hsue* & K. Chung

Source: Web Of Science
Added: August 6, 2018

The energy and Auger width for the singly core-excited Be-like ${1s2s}^{2}2p{}^{3}{P}^{o},$ ${(1s2s)}^{3}{S,2p}^{2}{}^{3}P,$ ${(1s2s)}^{1}{S,2p}^{2}{}^{3}P,$ and ${1s2s2p}^{2}{}^{3}{S}^{3}D$ states are calculated using a saddle-point complex-rotation method. The decay branching ratios of these states are calculated to check the spin-alignment-dependent Auger decay theory recently proposed by Chung. These branching ratios also enable us to make many positive identifications in the observed Auger spectra. In addition, the photoionization cross section (PICS) from the Be ${1s}^{2}2s2p{}^{3}{P}^{o}$ state is calculated for photon energies from 30 eV to 125 eV, including the resonance region. Accurate initial and final state wave functions are used. We find that although the Auger width of the ${(1s2s)}^{3}{S,2p}^{2}{}^{3}P$ transition is smaller than that of ${(1s2s)}^{1}{S,2p}^{2}{}^{3}P$ by a factor of 2.5, its peak PICS is larger by a factor of more than 300.