Ab initio studies on the vacuum ultraviolet (VUV) excimer emission spectra of NeB+ and ArB+

Abstract
In the ab initio calculations the NeB+ and ArB+ diatomic ions are found to emit the excimer‐type bound‐free broad bands in the vacuum ultraviolet region. The emission band from the v’=0 of the lowest singlet excited state 1Π of NeB+ has a peak at 72 000 cm1 (139 nm), while the spectrum from the v’=1 state exhibits two peaks at 73 500 and 70 200 cm1, which reflects the node of the vibrational wave function of the initial state. The calculated lifetime of the v’=0 state is 1 ns. The corresponding band of the v’=0 of ArB+ peaks at 49 000 cm1 (204 nm) and the lifetime is 6 ns.