Electronic structure and lifetime of an excimer state of HeF

摘要

Theoretical calculations have been carried out on the few lowest electronic states of HeF in an effort to identify a possible excimer state. The results show that the 2thinsp;2Sgr;+state is bound with a minimum at 2.0 bohr. The calculated predissociation rates of the ugr;=0,N=1 level of the 2thinsp;2Sgr;+state are lower by two orders of magnitude than the rate of the radiative transition 2thinsp;2Sgr;+, which has a vertical transition energy of 9.4 eV.