Two-photon induced exciton mediated dissociation of N2O and photomobility of O atoms in crystalline Xe
- 1 November 1992
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 97 (9) , 6199-6207
- https://doi.org/10.1063/1.463728
Abstract
Two-photon induced access of Xe excitons at 248 nm leads to efficient dissociation of N2O impurities via ionic potentials. The product O atoms are probed via the Xe+O− charge transfer transitions, and the N2O disappearance is probed by infrared (IR) spectroscopy. Charge transfer excitation of O atoms leads to atomic mobility, such that with extensive irradiation a photochemical steady-state is reached between N2O, oxygen atoms trapped in the Xe bulk, and within the same cage as N2. A detailed kinetic analysis of these processes is presented. Among the extracted parameters are the two-photon absorption cross section of Xe at 248 nm, 3.7×10−48 cm4 s, the free exciton migration length, 47 Å, and the excitonic dissociation probability of N2O, 0.85. The mobility of photoexcited O atoms is attributed to the topology of electronically excited surfaces which show minima at the ground state cage barriers.Keywords
This publication has 23 references indexed in Scilit:
- Electronic spectroscopy of oxygen atoms trapped in solid xenonThe Journal of Chemical Physics, 1992
- O(3P) atom lifetimes and mobilities in xenon matricesThe Journal of Chemical Physics, 1992
- Photodissociation of F2 and mobility of F atoms in crystalline argonThe Journal of Chemical Physics, 1990
- Chemiluminescent reactions of rare gas atoms, Rg(ns, 3P2, 3P1, 1P1) with N2O, SCO and SeCO: Spectroscopy and energy disposal in rare gas oxide, sulphide and selenide excimersChemical Physics Letters, 1987
- Nonlinear Excitation of Pure and Doped Rare Gas CrystalsPhysica Status Solidi (b), 1987
- Xenon oxide and xenon sulfide emission systems at 234 and 227 nmChemical Physics Letters, 1986
- Charge Carrier Generation in Solid Xenon by Two‐Photon AbsorptionPhysica Status Solidi (b), 1984
- A b i n i t i o multiple root optimization MCSCF study of the C∞v/C s excitation spectra and potential energy surfaces of N2OThe Journal of Chemical Physics, 1984
- Photodissociative production of O(1S) and N(2D) from N2O in an argon matrix at 4 KChemical Physics Letters, 1975
- Quenching cross sections for Xe(3P2) metastable atoms with simple moleculesChemical Physics Letters, 1974