Photoluminescence and X-Ray-Induced Luminescence Behavior of Sm2O3-Doped Oxyfluoroborate Scintillating Glass for Radiation Detecting Material

초록

Various concentrations of samarium (Sm3+) ion-activated oxyfluoroborate (ANCB:AlF3-NaF-CaF2-B2O3) glasses are fabricated for its applications in red-emitting lasers and scintillators. From the optical absorption spectrum, omega(2,4,6) intensity parameters and several radiative parameters along with the high value of absorption (2.96 x 10(-21) cm(2)) and emission (14.13 x 10(-22) cm(2)) cross sections are calculated. By stimulating at 403 nm, a transition corresponding to (4)G(5/2) -> H-6(7/2) (596 nm) is very intense and emits orange-reddish luminescence of Sm3+ ion in ANCB glasses. The decay curves are fit to the Inokuti-Hirayama (I-H) model to determine the energy transfer in Sm3+: ANCB glasses. The X-ray-excited luminescence (XEL) spectra are determined with an X-ray source by supplying the voltage of 50 kV and current 30 mA. The lasing parameters like stimulated emission cross section (14.13 x 10(-22) cm(2)), optical gain (30.52 x 10(-22) cm(2 )s), and quantum efficiency (80%) are found to be high for the (4)G(5/2) -> H-6(9/2) transition of Sm3+ ions. The quality of the emitted red light for the ANCBSm0.5 glass is calculated in terms of the (x, y) color coordinates and correlated color temperatures (CCT < 3000 K). The integral scintillation efficiency of glasses shows the maximum value of 23% in comparison with Bi4Ge3O12 scintillation crystal.

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