Abstract
A microscopic theoretical and experimental description of an elementary solid state photoreaction, i.e. the dissociation of a small molecule in a rare lattice is presented. The ingredients and results of molecular dynamics calculations for the dissociation of F2, Cl2, HI and H2O molecules are discussed and the concepts of cage effect, impulsive and delayed exit are illustrated. Examples for the determination of the structure and dynamics of educts and products in the matrix from ESR, infrared and neutron experiments are combined with experimental investigations of the barrier heights of the cage and the dependence of the dissociation efficiency on excess energy, deuteration, guest—matrix pair potentials and temperature. A long range migration of F fragments is demonstrated and applied to produce XeF molecules in rare gas crystals. The concept of solid state excimer lasers and the achieved large gain coefficients and stored energy densities in the UV spectral range are discussed.
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Schwentner, N., Chergui, M. (1992). Photochemistry, Charge Transfer States and Laser Applications of Small Molecules in Rare Gas Crystals. In: Di Bartolo, B., Beckwith, C. (eds) Optical Properties of Excited States in Solids. NATO ASI Series, vol 301. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3044-2_12
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DOI: https://doi.org/10.1007/978-1-4615-3044-2_12
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