Fast timing study of a CeBr3 crystal: Time resolution below 120 ps at 60Co energies
Fast timing study of a CeBr3 crystal: Time resolution below 120 ps at 60Co energies
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DOI：
10.1016/j.nima.2012.11.009
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发表时间：
2013-02-11
影响因子：
1.4
通讯作者：
Udias, J. M.
中科院分区：
文献类型：
--
作者：
Fraile, L. M.;Mach, H.;Udias, J. M.
我们报道了一种新型无机闪烁体CeBr3的时间响应。在Na-22和Co-60光子能量下，使用高度和直径分别为1英寸和1英寸的圆柱形晶体进行测量。在快速参考BaF2检测器上测量时间响应。采用滨松R9779和Photonis XP20D0快速光电倍增管（pmt）。根据时间分辨率对PMT偏置电压和恒分数鉴别器设置进行了优化。与Hamamatsu PMT耦合的单个CeBr3晶体在Co-60能量下的半最大全宽（FWHM）时间分辨率低至119 ps，与LaBr3（Ce）报道的107 ps分辨率相当。对于511 keV光子，CeBr3耦合到Hamamatsu PMT的FWHM时间分辨率为164 ps。(C) 2012 Elsevier B.V.版权所有。
We report on the time response of a novel inorganic scintillator, CeBr3. The measurements were performed using a cylindrical crystal of 1-in, in height and 1-in, in diameter at Na-22 and Co-60 photon energies. The time response was measured against a fast reference BaF2 detector. Hamamatsu R9779 and Photonis XP20D0 fast photomultipliers (PMTs) were used. The PMT bias voltages and Constant Fraction Discriminator settings were optimized with respect to the timing resolution. The Full Width at Half Maximum (FWHM) time resolution for an individual CeBr3 crystal coupled to Hamamatsu PMT is found here to be as low as 119 ps at Co-60 energies, which is comparable to the resolution of 107 ps reported for LaBr3(Ce). For 511 keV photons the measured FWHM time resolution for CeBr3 coupled to the Hamamatsu PMT is 164 ps. (C) 2012 Elsevier B.V. All rights reserved.