Rydberg States of SiCl

Abstract A fluorescence spectrum, excited by the synchrotron radiation of Superaco in a microwave discharge through He + SiCl 4 , leads to the observation of five new electronic states of SiCl, converging to the ground X 1 Σ + state of the SiCl + ion. The ( n s ς) and ( n p π) Rydberg series are extended respectively to n = 6 and n = 7. A new ionization limit is observed in absorption at 11.238 eV corresponding to the a 3 Π electronic state of SiCl + . Four new states are observed which converge to that limit.