Excitation of inner-shell states of CO2, COS, CS2, N2O and C2H2 by low energy electron impact

Abstract The design of an electron impact spectrometer for use in the study of inner-shell electric-dipole-forbidden transitions is described. The use of the spectrometer to investigate spin-forbidden transitions to inner-shell excited states of CO 2 , COS, CS 2 , N 2 O and C 2 H 2 is reported. For all these molecules, excitation of inner-shell triplet states has been observed.