Photodissociation and charge transfer photodynamics in crystalline krypton doped with F2 and Xe

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Abstract
Long‐range migration of F atoms upon photodissociation of F2 is demonstrated in mixed F2:Xe:Kr solids by monitoring arrival of F atoms at Xe sites. The impulsive migration probabilities are wavelength dependent. At excess energies above 2.4 eV migration lengths spanning 15 lattice sites are observed. Migration is not observed for excess energies below 1.9 eV. The photodynamics of charge transfer states in F:Xe:Kr solids is presented. Both diatomic Xe+F−, and mixed triatomic (KrXe)+F− exciplexes are observed. The XeF(C) and (KrXe)+F− states are strongly coupled and decay radiatively with a lifetime of 80 ns. These states are populated via excited vibrations of XeF(B) and XeF(D). A crossing between XeF(D) and KrXeF potentials is identified. Above this crossing the lower manifold of charge transfer states are directly populated, while a delay of 10 ns is observed below the crossing. XeF(B, v=0) remains uncoupled from the rest of charge transfer states. Implications with respect to solid state exciplex lasers are discussed.