Luminescence of BaF2–LaF3

Defect formation and VUV luminescence in BaF 2

“…As in the case of La-doping, a slow component of the luminescence at 4.0 eV, which is caused by self-trapped excitons, is suppressed by doping with Y. In both cases the high-energy emission, as the main cross-luminescence, is temperature independent at least from 77 to 300 K. Unfortunately, in our previous work [6] the wave-length scale of our monochromator was in error. Now we present the revised spectra (Fig.…”

“…In our previous work [6] we found that in the BaF 2 crystal doped with lanthanum a weak additional high-energy emission appears and its intensity grows with increasing La-doping. The emission arises from a radiation transition between the electron state of the interstitial F À i -ion, its electron state is located in the forbidden band at low concentration of lanthanum, and the outermost Ba 2þ 5p core band.…”

Luminescent centers in nanolayers of LiF crystals with embedded silver ions

“…Interest in the study of colour centers in lithium fluoride crystals is supported by numerous practical applications of this material. In particular, the colour centers are used in thermoluminescent detectors of the X-radiation [5]. Also, it is known that the introduction of various impurities (Mg, Cu, etc.)…”

Spectroscopy of divalent rare earth ions in fluoride crystals

“…% of CeF3 or PrF3. In alkaline earth fluoride single crystal growth a small amount of CdF2 was generally used as a scavenger in order to remove oxides contained in the raw materials [12][13][14][15]. The crystals of CaF2-Ce and CaF2-Pr were irradiated at 300 K by x-rays from a Pd tube operating at 35 kV and 20 mA during not more than one hour.…”