Radiative recombination of electron-hole pairs of solid Xe in the visible spectral range and inelastic scattering of photoelectrons

Between 200 and 700 nm, nominally pure solid Xe emits various luminescence bands. Part of them originates from known impurities. The origin of some bands is unknown. They require primary creation of free electron-hole pairs. This is concluded from their excitation spectra and especially from the clear threshold of inelastic electron-electron scattering characteristic for free secondary electron-hole pair creation.