Measurements of the photon detection inefficiency of calorimeters between 185 and 505 MeV
Measurements of the photon detection inefficiency of calorimeters between 185 and 505 MeV
复制标题
185 至 505 MeV 之间量热计光子检测效率低下的测量
DOI：
10.1016/s0168-9002(99)00571-9
复制
发表时间：
1999
影响因子：
1.4
通讯作者：
A. Toyofuku
中科院分区：
文献类型：
--
作者：
S. Ajimura;T. Endo;T. Inagaki;S. Itoh;Y. Kuno;K. Maeda;K. Maruyama;T. Nakano;H. Okuno;T. Sato;T. Shinkawa;T. Suda;K. Sugiyama;T. Terasawa;A. Toyofuku
使用来自 INS-ES 的标记光子束，在 185 至 505 MeV 之间的光子能量 (Eγ) 下测量了全吸收型电磁量热计、未掺杂 CsI 晶体计数器和铅闪烁体夹层计数器的光子检测效率低下。穿通效应通过 EGS 计算来估计。效率低下的另一个原因是光核相互作用效应，在通过样品量热计周围的液体闪烁计数器观察到的中子信号识别出相互作用后，对光核相互作用效应进行检查。在 CsI 量热计的情况下，在 1-MeV 阈值下，由于光核相互作用导致的效率低下为 10−5–10−6，并且随 Eγ 单调下降。研究发现夹心热量计的检测效率低下主要是由光核相互作用后的采样效应决定的。
The detection inefficiencies for photons of total-absorption-type electromagnetic calorimeters, an undoped CsI crystal counter and a lead-scintillator sandwich counter, have been measured at photon energies (Eγ) between 185 and 505 MeV with the tagged photon beam from the INS-ES. The effect of punch-through is estimated by an EGS calculation. The other source of inefficiency, the photonuclear interaction effect, is examined after the interaction is identified by neutron signals observed with liquid scintillation counters surrounding the sample calorimeter. The inefficiency due to the photonuclear interaction in the case of the CsI calorimeter at 1-MeV threshold is found to be 10−5–10−6and shows a monotonic decrease with Eγ. The detection inefficiency of the sandwich calorimeter is found to be dominated by the sampling effect after photonuclear interactions.