计量学报2024，Vol.45Issue(8)：1231-1235,5.DOI:10.3969/j.issn.1000-1158.2024.08.20
Zn吸收边附近质量衰减系数测量
Measurement of Mass Attenuation Coefficients near Zn Absorption Edge
摘要
Abstract
The exact value of the photon mass attenuation coefficient of a material needs to provide basic data for different fields.The monochromatic X-ray radiation device is an ideal device for the study of mass attenuation coefficient(p/p)because the energy of the device is continuous and can be reconciled with the number of measured photons.The mass attenuation coefficient measurement method of Zn samples in the range of 8～20 keV near the K absorption edge(9～11 KeV)with 0.1 keV step based on a monochromatic X-ray device is studied,and the experimental measurement values are compared with the NIST theoretical values.The results show that there is a maximum deviation near the K absorption edge jump,and the deviation decreases when moving away from the absorption edge.The measured curves are basically consistent with NIST-XCOM and NIST-FFAST curves,and the maximum deviation between the measured values and the theoretical values of NIST-XCOM is less than 10.51％.关键词
电离辐射计量/质量衰减系数/吸收边/单能X射线Key words
ionizing radiation measurement/mass attenuation coefficient/absorption edge/monoenergetic X-rays分类
通用工业技术引用本文复制引用
舒子瑶,郭思明,周幸,黄仕葵,樊丽鹏,李知微,王振..Zn吸收边附近质量衰减系数测量[J].计量学报,2024,45(8):1231-1235,5.基金项目
国家科技基础条件平台项目(APT2301-7) （APT2301-7）
中国计量科学研究院基本科研业务费(AKYZZ2115,AKYZD2412) （AKYZZ2115,AKYZD2412）
