An experimental and theoretical study of the ejected-electron spectrum of Sn I and Sn II autoionising levels between 0 and 20 eV resulting from 20-1000 eV electron impact excitation

Abstract

The ejected-electron spectrum of tin vapour atoms has been observed at 75 degrees to an incident electron beam of 20-1000 eV kinetic energy. A total to 71 lines are reported in the ejected-electron energy range 0-20 eV corresponding to autoionisation processes in Sn I and Sn II. Calculations have been used to make new assignments to the sp2np, d9s2p3 and d9s2p2 configurations. The results are compared with data from photoabsorption measurements, arc spectra and theoretical calculations.