8×8单元CsI(Tl)探测阵列研制

Development of 8×8 CsI(Tl) Array Detector

摘要: 描述了1个8×8单元CsI（Tl）探测阵列的结构和工作原理。探测阵列的每个单元是由1块前表面21 mm×21 mm、后表面23.1 mm×23.1 mm、高50 mm的CsI（Tl）棱台、1块光导和光电倍增管组成。在兰州放射性次级束流线（RIBLL）上对探测阵列进行测试，得到探测阵列对30 MeV质子的能量分辨可达2.7%，对170 MeV ⁷Be可达1.5％，可很好地用于放射性束物理实验中带电粒子的鉴别。

Abstract: The principle and structure of a 8×8 CsI(Tl) array detector were described in this paper. For each unit, there are a CsI(Tl) crystal, an optical conductor and a photoelectric multiplier tube. The length of CsI(Tl) crystal is about 50 mm with a 21 mm×21 mm front surface and a 23.1 mm×23.1 mm back surface. The energy resolution is 2.7% for 30 MeV proton and 1.5% for 170 MeV ⁷Be, which was tested on the RIBLL (Radioactive Ion Beam Line in Lanzhou). It can be used to identify the charged particles in the nuclear experiments induced by the radioactive beam.