UPS and XPS spectra of CdF₂and SrF₂and interpretation of optical properties of these compounds

Electronic and optical properties of cadmium fluoride: The role of many-body effects

“…8.4 − 8.7 eV). 13,49 The best accordance with experiments is found within the scQP-GW scheme with a high level of accuracy. In Fig.…”

“…In the same decade reflection spectra of CdF 2 have been determined in comparison with those of SrF 2 , 12 while UPS and XPS spectra of CdF 2 and SrF 2 have appeared in the literature in 1980. 13 Also β -PbF 2 and CdF 2 mixed crystals absorption coefficients have been reported by spectrophotometry measurements. 14 Various theoretical methods have been applied to study either the ground state or the excited states of the fluorite compounds.…”

“…46,47 The main outcomes of the present paragraph are reported in Table II tained with available experiments. 13,49 The other point is that for CdF 2 , G 0 W 0 is not sufficient and a self-consistent procedure, GW based, has to be considered in addition. Referring to Fig.…”

Scintillation properties of CdF2 crystal

“…Considering the bandgap energy, this excitation band is located within the bandgap. It should be noted that the luminescence band was not effectively induced by core level excitation, which corresponds to the wavelength of approximately 100 nm according to the energy split between the conduction band minimum and the outermost core level (Cd 2+ 4d orbital) [19]. ns decay time so that the experimental emission peaks well coincided with the prediction at least in scintillation spectrum.…”

Synchrotron spectroscopy of confined carriers in CdF2-CaF2 superlattices

“…The time-integrated excitation spectrum for the CaF 2 crystal was recorded at a sample temperature 8 K while monitoring STE emission at k ¼ 287 nm (4.32 eV). Reflection spectra for both the CdF 2 and CaF 2 crystals as well as the excitation spectrum obtained monitoring the CdF 2 exciton emission (all 104305-3 measured at liquid nitrogen temperature) were extracted from published sources 14,26,30 using graph digitizing software. Table I compares the energies of the fundamental absorption edge in the CaF 2 -CdF 2 superlattices with that of the CdF 2 and CaF 2 bulk crystals.…”