2001 journal article

Photoionization of lithium 1s(2)2s and 1s(2)2p near the triply excited resonances


By: K. Chung & T. Fang n

Source: Web Of Science
Added: August 6, 2018

A newly developed saddle-point multichannel K-matrix method is used to study the photoionization of lithium from ${1s}^{2}2s$ and ${1s}^{2}2p$ for photon energies near the $2p2p2p$ ${}^{2}{P}^{o}$ and $2s2p2p$ ${}^{2}{L}^{e}$ $(L=0,1,2)$ resonances. Highly accurate initial- and target-state wave functions are used and up to 17 open channels are included in the calculation. The calculated partial and total photoionization cross sections are compared with the available theoretical and experimental data. The partial cross sections obtained in this work suggests that for Li ${1s}^{2}2s$ and ${1s}^{2}2p$ initial states, the $1s$ electron with spin antiparallel to that of the $2s$ (or $2p)$ electron is the one most likely to be ejected in the photoionization process. The elastic and inelastic electron-ion scattering cross sections are also calculated. The relative magnitude of the calculated collision strength is compared with the Auger branching ratios for these resonances.