Lifetime of the Xe II 5s5p62S1/2state

Abstract
Synchrotron radiation affords the possibility of lifetime measurements of excited ionic states following their selective excitation. The authors have used this method to determine the lifetime of the Xe II 5s5p6 2S1/2 state as 34.4(6) ns. Multiconfiguration Hartree-Fock calculations yield a value of 9.5 ns, indicating the importance of relativistic effects in such a system.