溴化铊探测器制备工艺研究

• 作 者: 郝晓勇
• 机 构: 核技术应用研究所,
• 出 处: 中国原子能科学研究院年报
• 发表日期: 2014年00期
• 关键词: 制备工艺研究 阻止本领 机械加工性能 化学抛光 前沿热点 γ射线 禁带 蒸镀 能量分辨率 探测效率

溴化铊(TlBr)晶体是制备室温γ射线及X射线探测器的优良材料,晶体平均原子序数高,对射线的阻止本领强;禁带宽度大,电阻率高,漏电流较小;化学稳定性好,机械加工性能好。在室温下,TlBr探测器对核辐射具有较高的探测效率和较好的能量分辨率。因而,近年来倍受人们的关注,已成为目前研究的前沿热点之一。TlBr核辐射探测器制备的主要工艺为:1)切割;2)化学抛光;3)蒸镀电极;4)封装在衬底上;5)测试。

The thallium bromide (TlBr) crystal is an excellent material for the preparation of γ-ray and X-ray detectors at room temperature. The average atomic number of the crystal is high, and the ability of blocking the beam is strong. The band gap, the resistivity and the leakage current are small. Good sex, good machinability. At room temperature, TlBr detector for nuclear radiation with high detection efficiency and better energy resolution. Therefore, much attention has been paid in recent years and it has become one of the frontier hotspots in current research. TlBr nuclear radiation detector preparation of the main process are: 1) cutting; 2) chemical polishing; 3) evaporation electrode; 4) package on the substrate;