采用改进的坩埚下降法生长出φ1.5"×1.5"的无宏观缺陷的溴化铈晶体毛坯.研究测试了溴化铈晶体的荧光光谱、紫外-可见透射光谱及光输出、能量分辨率、本底等闪烁性能.结果表明:在光致激发下,溴化铈晶体的发光主峰位于390 nm;其10 mm厚度样品在390nm处的光透过率为60％;φ1"×1"大小的样品在137Cs源的662 keV伽马射线作用下能量分辨率为4.26％,光输出相当于NaI(Tl)晶体的125％;溴化铈晶体中在0.005 Bq/g探测限下未检测到138La和227Ac元素,本底水平显著低于掺铈溴化镧晶体.
参考文献
| [1] | Shah K.S.;Glodo J.;Higgins W.;van Loef E.V.D.;Moses W.W.;Derenzo S.E.;Weber M.J..CeBr/sub 3/ scintillators for gamma-ray spectroscopy[J].IEEE Transactions on Nuclear Science,20056(6):3157-3159. |
| [2] | Higgins WM;Churilov A;van Loef E;Glodo J;Squillante M;Shah K.Crystal growth of large diameter LaBr3 : Ce and CeBr3[J].Journal of Crystal Growth,20087/9(7/9):2085-2089. |
| [3] | Drozdowski W;Dorenbos P.;Bos A. J. J.;Bizarri G.;Owens A.;Quarati F. G. A..CeBr<formula formulatype="inline"><tex>$_{3}$</tex></formula> Scintillator Development for Possible Use in Space Missions[J].IEEE Transactions on Nuclear Science,20083(3):1391-1396. |
| [4] | 桂强;张春生;邹本飞;张明荣.直径2英寸氯化铈掺杂溴化镧晶体制备与闪烁性能研究[J].人工晶体学报,2013(4):616-619. |
| [5] | Quarati, F.G.A.;Dorenbos, P.;Van Der Biezen, J.;Owens, A.;Selle, M.;Parthier, L.;Schotanus, P..Scintillation and detection characteristics of high-sensitivity CeBr _3 gamma-ray spectrometers[J].Nuclear Instruments and Methods in Physics Research, Section A. Accelerators, Spectrometers, Detectors and Associated Equipment,2013:596-604. |
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