The heteronuclear excimers ArKr*, ArXe*and KrXe*

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Abstract
If solid layers of condensed Ar or Kr are bombarded with thermal Xe or Kr atoms in the metastable 3P2 state, the mixed rare-gas excimers ArKr*, ArXe* and KrXe* are formed on or within the surface. From the observed vacuum UV emissions between 110 and 190 nm, the following binding energies with respect to dissociation for these heteronuclear excimers can be derived: ArKr* (106+or-20) meV, ArXe* (38+or-3) meV and KrXe* (138+or-50) meV. While in the case of KrXe* the binding energy reported by other authors is confirmed, the existence of ArKr* and ArXe* is unequivocally established for the first time. From the obtained vacuum UV spectra, the potential parameters for the three heaviest rare-gas excimer systems are deduced.