Investigation of the properties of a 1″×1″ LaBr3:Ce scintillator

Investigation of the properties of a 1″×1″ LaBr3:Ce scintillator
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DOI：
10.1016/j.nima.2007.08.221
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发表时间：
2007-11
期刊：
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
影响因子：
1.4
通讯作者：
R. Nicolini;F. Camera;N. Blasi;S. Brambilla;R. Bassini;C. Boiano;A. Bracco;F. Crespi;O. Wieland;G. Benzoni;S. Leoni;B. Million;D. Montanari;A. Zalite
R. Nicolini;F. Camera;N. Blasi;S. Brambilla;R. Bassini;C. Boiano;A. Bracco;F. Crespi;O. Wieland;G. Benzoni;S. Leoni;B. Million;D. Montanari;A. Zalite
中科院分区：
物理与天体物理3区
文献类型：
--
作者：
R. Nicolini;F. Camera;N. Blasi;S. Brambilla;R. Bassini;C. Boiano;A. Bracco;F. Crespi;O. Wieland;G. Benzoni;S. Leoni;B. Million;D. Montanari;A. Zalite

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研究了圆柱形1″×1″ LaBr 3：Ce闪烁体（Brillance 380）的性能。在662 keV的γ射线能量下，能量分辨率小于3%，本征时间分辨率为230 ps。两个不同的方面进行了调查。第一个是通过测量HPGe、BGO和BaF 2探测器中γ射线的符合，详细研究了晶体的自活动，发射α和β粒子以及γ射线。特别是，与HPGe探测器的重合允许清楚地分离227 Ac（镧的化学同系物）及其子核到稳定的207 Pb的不同贡献。第二个方面是确定γ射线探测的效率，在1 MeV下测量，并使用GEANT 4模拟高达15 MeV作为探测器尺寸的函数。
The properties of a cylindrical 1″×1″ LaBr3:Ce scintillator (Brillance 380) were investigated. The energy resolution at γ-ray energy of 662keV was measured to be smaller than 3% and the intrinsic time resolution was found to be ≈230ps. Two different aspects were investigated. The first is the detailed study of the crystal self-activity, emitting α and β particles and γ-rays, by measuring coincidences with γ-rays in HPGe, BGO and BaF2detectors. In particular, the coincidence with an HPGe detector allowed to isolate clearly the different contributions from227Ac (chemical homologue of lanthanum) and its daughter nuclei down to the stable207Pb. The second aspect is the determination of the efficiency for γ-ray detection, measured at 1MeV and simulated using GEANT4 up to 15MeV as a function of the detector size.