用于XTES的铋吸收体对单色X射线的响应研究  

Study of the response of bismuth absorbers for XTES to monochromatic X-rays

作　　者：舒子瑶 郭思明[2] 蒋政 郄晓雨 郭锴悦 黄仕葵 赖万昌[1] 周幸 樊丽鹏 余涛 SHU Ziyao;GUO Siming;JIANG Zheng;QIE Xiaoyu;GUO Kaiyue;HUANG Shikui;LAI Wanchang;ZHOU Xing;FAN Lipeng;YU Tao(Chengdu University of Technology,Chengdu,Sichuan 610059,China;National Institute of Metrology,Beijing,100029,China)

机构地区：[1]成都理工大学,成都610059 [2]中国计量科学研究院,北京100029

出　　处：《核电子学与探测技术》2023年第5期1030-1036,共7页Nuclear Electronics & Detection Technology

基　　金：单能X射线量子计量基准预研(AKYZZ2115)。

摘　　要：超导转变边缘探测器(TES)是目前为止已知的具有最佳的能量分辨率的X射线探测器。金属Bi因其具有较好的X射线吸收率和低比热容而被广泛用于XTES的吸收体。通过电镀的方法制备了一种由Bi构成的XTES吸收体薄膜,使用Ti和Au作为导电层在Si上提供电流通路。研究了电镀法制备Bi金属XTES吸收体对单能X射线的吸收效率,使用高纯锗探测器测量通过吸收材料前后的单能X射线光子数,以全能峰面积衡量不同厚度电镀Bi吸收体对单能X射线的吸收效率。研究结果对促进先进探测器的国产化具有重要意义。Superconducting Transition Edge Detectors(TES)are X-ray detectors with the best energy resolution known so far.Bismuth metal(Bi)is widely used as an absorber for XTES because of its good X-ray absorptivity and low specific heat capacity.An XTES absorber film consisting of Bi was prepared by electroplating method using titanium(Ti)and gold(Au)as conductive layers on silicon(Si)to provide the current path.In this paper,the absorption efficiency of monoenergetic X-rays by Bi metal XTES absorbers prepared by electroplating method is investigated,and the number of monoenergetic X-ray photons before and after passing through the absorbing material is measured using a high-purity germanium detector,and the absorption efficiency of monoenergetic X-rays by different thicknesses of electroplated Bi absorbers is measured in terms of the area of all-around peaks.The results of the study are of great significance in promoting the localization of advanced detectors.

关 键 词：单能X射线 TES吸收体 电镀Bi膜 布拉格衍射 

分 类 号：TB98[一般工业技术—计量学]