Radiation transformation of the oxygen‐containing impurity in LiF crystals doped with different polyvalent cations

Abstract

Time‐resolved spectroscopy and infrared spectroscopy were used to investigate radiation transformation of the oxygen–hydrogen impurity in LiF crystals doped with oxides of different metals Li, W, Ti and Fe with the ab‐sorbed dose range of 101–105Gy in the time interval of 10‐9–10‐1s and in the temperature interval of 15–300 K (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Effect of the surface on luminescence properties of ZnWO4 crystals

“…The presence of this band has been found for the first time in [9]. Bands with the same spectral-kinetic parameters of decay can be found in the pulsed cathodoluminescence (PCL) and PPL spectra of LiF crystals doped with oxides of various metals [14]. According to [15], the emission at 3.1 eV in the spectrum of LiF-O crystal belongs to the radiative transition in O 2À ion, and this transition is excited in the bands at 6.1 and 7.3 eV which belong to O 2À -V a dipoles.…”

“…The coincidence of the emission characteristics for LiF-WO 3 and ZnWO 4 crystals (peak position, FWHM, the values of the three decay time constants and possibility of emission excitation with the 4.66 eV photon energy in both crystals [14,16]) indicates that the LCs in both materials are of the same nature independent of the cations.…”

Scintillation Characteristics of Lithium Fluoride Crystals Doped with Tungsten Oxide

“…The spectrum of short-lived emission is the band at 3.6 eV with a half-width of 0.6 eV. The band at 3.6 eV is absent for the non-doped LiF crystal grown by the Stockbarger method in fluorinating atmosphere and is observed in all LiF crystals doped by various oxides: Li 2 O, WO 3 , TiO 2 , or Fe 2 O 3 as shown in [3]. Neither the spectral position of the band nor the lifetime (< 20 ns) of the corresponding luminescence center depend on the type of the cation-coactivator.…”

Radiation accumulation of F2 color centers in LiF crystal

“…1). In doped crystals dose dependent of the F 2 centers accumulation is a curve with saturation in region of absorbed doze of 5.10 3 Gy [3]. Figure 2 shows the absorption relaxation kinetics (ARK) obtained for the maxima of the F 2 and F 2 + bands initiated by EP at 300 K in previously irradiated crystals LiF.…”