Abstract:The use of solid rare gas matrices as detectors of metastable oxygen atoms is investigated. A 100 eV electron beam colliding with N2O target gas is used as the source of O( 1 S). Parameters considered are surface temperature, time delay of excimer emission and spectral response to O( 1 S). In all cases detector sensitivity maximised at temperatures ≤20K. Krypton was found to provide the most sensitive surface and Ne the least.

Production of metastable O(1 D2) atoms following controlled electron impact on N2O and CO2 targets has been studied using a neon rare gas matrix detector operating at a temperature of <20K. A 100 eV pulsed electron beam was used in conjunction with time of flight (TOF) techniques to establish O-atom fragment kinetic energies. Probable dissociation channels are discussed.

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