Scintillation properties of Yb-doped Bi₄Ge₃O₁₂ single crystals emitting near-infrared luminescence

Abstract

Yb-doped Bi4Ge3O12 (BGO) single crystals with different dopant concentrations were synthesized by the floating zone method, and the photoluminescence (PL) and scintillation properties in visible to near-infrared (NIR) wavelength ranges were evaluated. In PL and scintillation, a broad emission band was observed at 400–600 nm, which was ascribed to the electronic transitions of Bi3+. Furthermore, NIR emission bands due to Yb3+ were observed at 1000 nm. To evaluate scintillation detector properties, the relationship between emission intensity in NIR range and X-ray exposure dose rate was investigated. Among the present samples, 0.5 and 1% Yb-doped BGO showed good linearity in the dynamic range from 0.006 to 60 Gy/h.

Radiation-induced Luminescence Properties of Tm-doped Bi4Ge3O12 Single Crystals

“…(21) However, the limit was inferior to that measured using BGO doped with other rare earths with an InGaAs PD. (39)(40)(41)(42) The main emission of Tm 3+ appeared at 800 nm as shown in Fig. 5.…”

“…The 0.1% Tm-doped BGO showed a relatively high QY compared with BGO doped with other rare earths, because the QYs of Nd-, Er-, Pr-, and Yb-doped BGO samples with the optimum doping concentration in the NIR range were respectively reported to be 43, 86, 35, and 26%. (39)(40)(41)(42) The PL decay curves of the samples are shown in Fig. 4.…”

Photoluminescence and scintillation properties of Pr-doped (Lu, Y)2Si2O7 crystals

“…6) The required properties for the scintillators vary for each application; however, high emission efficiency, fast decay, and low afterglow are generally important as scintillation properties. To explore the scintillators which satisfy the above requirements, various types of scintillators such as single crystals, [7][8][9][10] ceramics, [11][12][13] glasses, [14][15][16] and liquids [17][18][19] have been researched.…”

Dopant concentration dependence on optical and scintillation properties of Eu-doped Gd3Al2Ga3O12 single crystals

“…9,10) Favorable properties of scintillators for Xand γ-ray detection are a large effective atomic number (Z eff ), a high density, a fast decay time, a high light yield (LY), high energy resolution, and a non-hygroscopicity. Since the ideal scintillator that is excellent in all the properties has still not been developed, properties of novel organic 11) and inorganic 12) scintillators such as crystalline films, 13) single crystals, [14][15][16][17] ceramics, 18,19) and glasses 20) are intensively studied.…”