The L_2,3 Valence Band Emission Spectrum of Thallous Chloride

Abstract

In the course of the soft X-ray emission measurements of TlCl, the low-in-tensity emission band extended from 187.7 eV to 195.9 eV is observed newly on the high energy side of the Cl⁻L_η,l emission line. This band is assigned to the valence band emission spectrum of TlCl by comparing with the X-ray photoelectron spectrum and also with the UV and Cl⁻L_2,3 absorption spectra. The band has two maxima separated by about 3 eV, which corresponds well to the energy separation between two s-type branches in the valence band given by recent calculations.