Soft X-Ray Absorption Spectra of Some Metal Chlorides

Abstract

The Cl - L 23 absorption spectra of thin films of CuCl, ZnCl 2 , CdCl 2 , PbCl 2 , MnCl 2 , FeCl 2 , CoCl 2 , NiCl 2 , MgCl 2 , CaCl 2 , SrCl 2 , and BaCl 2 have been measured by the photographic method using synchrotron radiation from a 1.3 Bev electron synchrotron as a soft X-ray source. In all materials studied, other than CaCl 2 , SrCl 2 , and BaCl 2 , the absorption spectra near the threshold show absorption bands probably due to the creation of excitons with holes in the 2 p level of chlorine. The intense and broad absorption continuum beginning around 211 eV is observed in all materials studied. This absorption is assigned to the atomic excitation of Cl - ions. Discussion is given about the profile of each spectrum.