Photoluminescence excitation spectra of solid krypton

The excitation spectrum of the intrinsic photoluminescence of solid krypton has been investigated between 9.8 eV and 14 eV. Samples with a 'clean' surface yield a quantum efficiency which is within an uncertainty of approximately 10% independent of the kind of initially excited states. Surface contamination reduces the steady state concentration of excited states leading to quenching of the intrinsic luminescence. In the region of excitonic excitation the energy transfer between excitons and the surface is investigated. Assuming exciton diffusion, a diffusion length Lsub(o) = 200 A is obtained for the n = 1 and n' = 1 excitons. Under the assumption of long range dipole dipole interaction a critical radius Rsub(o) = 22 A is deduced. (orig.)