Luminescence of oxygen-rare gas exciplex compounds in rare gas matrices

The paper is concerned with the visible and VUV investigations of luminesce nce spectra of argon and neon crystals doped with oxygen. The relations bet ween luminescence band intensity and oxygen concentration and crystal tempe rature as well as the band quenching by more reactive xenon doping are exam ined. A comparison with rare-gas fluorides in rare-gas matrices permits the luminescence of E-max = 4.9 and 6.25 eV in argon and of E-max = 11.65 eV i n neon to be identified as transitions from the charge transfer exciplex co mplex Ar2+O- and Ne2+O-, respectively. The potential energy and the lumines cence energy of Ar2+O- in gas phase and crystal phase are estimated, the es timates being in good agreement with the experimental data. (C) 2000 Elsevi er Science B.V. All rights reserved.