新一代便携式X射线荧光仪及其在铀分析中的初步应用  

The preliminary application of a new portable uranium X-ray fluorescence analyzer

作　　者：程锋[1] 葛良全[1] 赖万昌[1] 胡克亮 郭伟[1] 

机构地区：[1]成都理工大学地学核技术四川省重点实验室,四川成都610059 [2]新疆地矿局,新疆乌鲁木齐830000

出　　处：《铀矿地质》2008年第6期375-379,368,共6页Uranium Geology

基　　金：中国地质调查局项目"野外现场手提式X荧光仪的研制与示范"(编号:1212010560204)的资助。

摘　　要：本文主要介绍了新一代便携式X射线荧光仪在铀分析中的应用研究。该仪器主要由电制冷Si-PIN半导体X射线探测器和内嵌工控微机多道谱仪系统组成,整机重约2 kg,利用同位素源产生的X(γ)射线激发待测样品。进行241Am源和109Cd源在对铀的激发效率、基体干扰方面的对比分析研究,选出了241Am源作为分析铀元素的同位素激发源,并测定了该仪器对铀元素的探测下限,为今后的铀矿勘查、开采提供了一种新型、轻便、现场快捷的分析技术和手段。The paper presents a new portable uranium X-ray fluorescence analyzer and its application in uranium mine grade analysis. The analyzer consists of Si-PIN X-ray detector with electro thermal cooler and a multi-channel MCA based on an embedded computer. The analyzer is about 2 kg weight. Based on the research on the excitation efficiency and matrix effect with different sources, ^241 Am isotope sources was finally chosen as the ideal excitation sources to analyze uranium, the analytical limit was setled for the element of uranium. The analyzer can provide a new technique and method for the future uranium mine prospecting and exploitation with several advantages such as light and easy to operate, etc .

关 键 词：铀矿勘查 X射线荧光 同位素激发源 

分 类 号：P619.14[天文地球—矿床学] O657.34[天文地球—地质学]