Photo‐ and radioluminescence of Dy³⁺‐doped oxide glass with high‐Gd₂O₃ content

Abstract

Dy3+‐doped oxide glass with 30 mol.% Gd2O3 content in the glass host was prepared by melt quenching under CO reducing atmosphere. The luminescence properties were investigated under UV and X‐ray excitation. The 4F9/2→6HJ (J = 15/2, 13/2, 11/2, and 9/2) luminescence was observed with intense blue (484 nm; 4F9/2→6H15/2) and yellow (576 nm; 4F9/2→6H13/2) emissions. Energy transfer from Gd3+ to Dy3+ ions was confirmed by photoluminescence excitation and emission spectra as well as photoluminescence decay measurements. The integral scintillation efficiency of 11% of Bi4Ge3O12 scintillator was obtained.

Luminescence, scintillation, and energy transfer in SiO2 -Al2 O3 -B2 O3 -Gd2 O3 :Ce3+ ,Pr3+ glasses

“…Figure presents the absorption spectra of SABG, SABG:Pr, and SABG:Ce,Pr glasses. In the absorption spectrum of SABG host glass, there are characteristic peaks of Gd 3+ : 4f → 4f transitions at 312, 272, and 250 nm due to 8 S 7/2 → 6 P 7/2 , 6 I 7/2 , and 6 D 7/2 transitions, respectively . In the absorption spectrum of SABG:Pr glass, there exist Pr 3+ 4f → 4f transitions from the 3 H 4 ground state, situated within 445–488 and 594 nm (for details see the transmission curve in the inset of Fig.…”

“…Intense luminescence under UV and X‐ray excitations was obtained for the high‐silica glasses doped with Ce 3+ , Eu 2+ , or Tb 3+ . Dense oxide glasses with high‐Gd 2 O 3 content were also investigated for efficient detection of high energy photons . The enhanced luminescence of Ce 3+ , Tb 3+ , or Dy 3+ in these glasses occurs through a non‐radiative energy transfer (ET) from Gd 3+ ions in the glass matrix to the Ce 3+ , Tb 3+ , or Dy 3+ dopant ions, respectively.…”