Photoluminescence Excitation Spectra of Solid Krypton

Abstract

Abstract The excitation spectrum of the intrinsic photoluminescence of solid krypton has been investigated between 9.8 and 14eV. Samples with a clean surface yield a quantum efficiency which is within an uncertainty of ≈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 L 0 = 200 Å is obtained for the n = 1 and n ′ = 1 excitons. Under the assumption of long range dipole–dipole interaction a critical radius R 0 = 22 Å is deduced.