Scintillation performance of the Ce3+ -activated lithium phosphate glass. (October 2022)

• Record Type: Journal Article
• Authors: Saha, Sudipta; Ntarisa, A.V.; Quang, Nguyen Duy; Luan, N.T.; Vuong, P.Q.; Kim, H.J.; Intachai, N.; Kothan, S.; Kaewkhao, J.
• Is Part Of: Radiation physics and chemistry. Volume 199(2022)
• Publication Date: 2022-10
• Subjects: Phosphate glass -- Luminescence -- Scintillation -- Light yield -- Decay time; Radiation chemistry -- Periodicals; Radiometry -- Periodicals; Radiation -- Periodicals; Chimie sous rayonnement -- Périodiques; 539.2
• DOI: 10.1016/j.radphyschem.2022.110285
• Languages: English
• ISSNs: 0969-806X

Abstract

Abstract: Ce 3+ -doped phosphate glasses with intense luminescence were reported extensively for radiation detection in recent decades. With the same intension, we fabricated glasses of composition 45P2 O5 :35Li2 O:(10-x)GdI3 :5Al2 O3 :5Ca2 CO3 :xCeBr3 (x = 1, 2, 3, 5) in molar ratio using conventional technique followed by thermal annealing. The luminescence studies confirmed the energy transfer process from Gd 3+ to Ce 3+ -ions. The scintillation measurements of the optimized sample were performed under the excitation of α -particles and γ-rays. A photopeak was detected under γ-ray excitation at 662 keV energy from 137 Cs source. The estimated absolute light yield was 1600 ± 200 Photons/MeV. The shortest component of the decay time under α -particles and γ -ray excitations was found 32.5 ± 0.3 ns and 39.9 ± 0.4 ns, respectively. In the future, the glass configuration can be engineered to improve radiation detection performance. Highlights: Fabricated Ce 3+ doped lithium rich phosphate glasses for radiation scintillation. Observed energy transfer from Gd 3+ (4f) to Ce 3+ (5d band) in Photoluminescence. Photopeak was identified at 662 keV γ-ray excitation from 137 Cs with 31% FWHM. The measured absolute light yield is 1600 ± 200 Photons/MeV. The shortest decay component under γ-ray excitation is 39.9 ns.