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Radiation-induced luminescence and photoluminescence properties of (K,Rb)2CuBr3 crystals synthesized by the slow cooling method.
- Source :
-
Radiation Physics & Chemistry . Jan2024, Vol. 214, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- (K,Rb) 2 CuBr 3 crystals were fabricated by the slow cooling method, and their photoluminescence (PL) and scintillation properties were examined. Emission bands were observed at 350–550 nm under UV and X-ray irradiation. PL quantum yields of K 2 CuBr 3 , (K 0.25 ,Rb 0.75) 2 CuBr 3 , (K 0.5 ,Rb 0.5) 2 CuBr 3 , (K 0.75 ,Rb 0.25) 2 CuBr 3 , and Rb 2 CuBr 3 were respectively 75.8, 71.0, 82.3, 96.9, and 96.3%. The scintillation decay curves were approximated by a sum of three exponential functions, and the decay time constants due to recombination of self-trapped excitons were 58–63 μs. The afterglow levels of the K and Rb-mixed samples at 20 ms passed after X-ray irradiation decreased to 10–40 ppm, compared with those of K 2 CuBr 3 and Rb 2 CuBr 3. Among these samples, (K 0.75 , Rb 0.25) 2 CuBr 3 showed the highest light yield of 7400 ph/MeV among the samples calculated from the pulse height spectra of 137Cs γ-rays (662 keV). • (K,Rb) 2 CuBr 3 crystals were synthesized by the slow cooling method. • The afterglow levels of the (K,Rb) 2 CuBr 3 were 10–40 ppm. • (K 0.75 ,Rb 0.25) 2 CuBr 3 showed the highest light yield (7400 ph/MeV) in prepared samples. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0969806X
- Volume :
- 214
- Database :
- Academic Search Index
- Journal :
- Radiation Physics & Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 173120808
- Full Text :
- https://doi.org/10.1016/j.radphyschem.2023.111292