Ultra-violet optical properties of potassium fluoride
D. M. Roessler, H. J. Lempka
The reflection spectrum at normal incidence of monocrystalline potassium fluoride has been measured in the range 6-24 eV in the far ultra-violet. The data were analysed by means of a Kramers-Kronig transform to generate the dielectric parameters n2 - k2 and 2nk. Computed energy losses broadly resemble those measured directly in the work of Best on characteristic electron energy losses. The role of the valence electrons is discussed in terms of their contribution to the observed optical properties and possible plasma resonances. The observed structure is discussed in terms of exciton states and interband transitions.
