Autoionization Spectra of Lithium

Abstract

Resonances have been observed in neutral lithium vapor by absorption spectroscopy for photons in the 50- to 70-eV energy range. These resonances are due to the excitation of a $K$-shell electron, or the simultaneous excitation of a $K$-shell electron and an outer electron to final states of the type ($1s2pnl$) or ($1snl{n}^{\prime }{l}^{\prime }$). Several well-developed series have been observed as well as resonances where energy position and intensity are perturbed by neighboring configurations.