Fluorescent emission and scattering spectra of lithium fluoride by using synchrotron radiation

The fluorescent emission and scattering spectra of metallic lithium and lithium fluoride were obtained by using continuous radiation from the Institute for Nuclear Study synchrotron in the energy region of 40-80 eV. The spectrum of metallic lithium is in close resemblance with the one obtained by an ordinary electron excitation method. The spectrum of lithium fluoride, on the contrary, exhibits strong evidence of scattering by the exciton state and the continuum in addition to the ordinary fluorescence due to the valence-band-to-${\mathrm{Li}}^{+}$ $1s$-level electron transition. Other possibilities for the cause of the observed features were qualitatively discussed.