Scintillation properties of Lu₂Si₂O₇:Ce³ , a fast and efficient scintillator crystal

Abstract

Cerium doped lutetium pyrosilicate Lu2Si2O7:Ce3+ (LPS), a new inorganic scintillator, displays particularly promising performance. This material can be readily pulled from the melt. A high light output (average value: 26 300 ph MeV−1), a relatively good energy resolution (9%) and a fast decay time (38 ns) without afterglow make this new scintillator very attractive, in particular for medical imaging. Optical characterizations and scintillation properties of LPS:Ce large single crystals are presented, including timing properties and study of the scintillation yields as a function of incident energy.

Complex oxide scintillators: Material defects and scintillation performance

“…A very nice confirmation of the intrinsic origin of traps was the finding that all oxyorthosilicates possessing C2/c structure (YSO, LSO, YbSO, ErSO) are characterized by similar TSL glow curves above RT, irrespective of their doping [140,141] so that crystal structure seems to play an important role in trap properties. The favorable absence of afterglow in LPS, accompanied by the lack of TSL glow peaks close to RT [142], can be thus explained in terms of its different C2/m structure leading to different Ce 3+ -oxygen (and thus oxygen vacancy) configurations and distances. 3 Future materials and technologies Despite of the best figure-of-merit of the single crystal scintillators, by far not all intrinsically efficient compounds can be grown in the form of bulk single crystals with sufficiently big dimensions and manufacturing price affordable for practical applications.…”

Improved scintillation time response in (Lu0.5Gd0.5)2O3 : Eu3+ compared with Lu2O3 : Eu3+ transparent ceramics

“…Today the main scintillating materials for medical imaging are 8 Gd 2 O 2 S:Pr,Ce,F [1], (Y,Gd)O 3 :Eu,Pr [2] and CdWO 4 [3,4] for X-ray Computed 9 Tomography (CT) whereas BGO (Bi 4 Ge 3 O 12 ) [5,6], NaI:Tl [7], LYSO 10 ((Lu,Y)SiO 5 :Ce 3+ ) [8,9] and LPS (Lu 2 Si 2 O 7 ) [10,11,12] are often used for Positron 11…”

Cerium concentration and temperature dependence of the luminescence of Lu2Si2O7:Ce scintillator

“…Cerium-doped lutetium pyrosilicate Lu 2 Si 2 O 7 :Ce (LPS:Ce) is a high performance scintillator found in 2000 [1], which exhibits outstanding scintillation properties: high light yield (26,000 photons/MeV), short decay time (38 ns) without observable afterglow and high density (6.2 g/cm 3 ). So it is a good candidate scintillator used for the X-ray and ␥-ray detection devices due to its outstanding scintillation and physical performance.…”