AB-INITIO CALCULATIONS OF EXCITED RARE-GAS ALKALI IONS

The excimer-like ions formed by combining a rare gas ion with an alkal i atom were investigated by an ab initio HF-CI calculation. The result ing four bound excited states 1SIGMA+, 1PI, 3SIGMA+ and 3PI were subje cted to a semiempirical spin orbit (SO)-coupling yielding eight fine s tructure levels with angular momenta OMEGA = 2, 1(3) and 0(4). For (Ne Li)+, (NeNa)+, (ArLi)+, (ArNa)+, (ArK)+ and (KrLi)+ the wavelengths fo r the five allowed transitions to the ground state were calculated. Th e results are in close agreement with the experimental results. Also o ther spectroscopic properties as binding energies, transition moments and vibrational quanta are given.