EPR Studies of Atomic Impurities in Rare Gas Matrices

Trapping and thermal migration of the first- and second-row atoms in Ar, Kr and Xe crystals

“…The ESR studies of nitrogen atoms generated in Ar, Kr and Xe matrices by photolysis 30,115,116 consistently give one signal attributed to the SS site. 116,117 Puzzling results were obtained by Eloranta et al 30 who studied the photodynamics of NO in RG matrices. The recombination-indicating thermally-stimulated luminescence of NO in Ar takes place in the 15-18 K range reaching the maximum at 16 K. Similar dependence was found in Kr in the 18-24 K range with the maximum at 22 K. No TSL were seen in Xe up to the sample evaporation even though the ESR spectrum survives up to at least 60 K. No correlation between the TSL and temperature evolution of the ESR signal, which remains stable up to at least 30 K in Ar and Kr, was observed.…”