便携式α谱仪中真空度影响特征试验研究  

Experimental Study on Vacuum Level Impacting Features Based on Portable α Spectrometer

作　　者：黄连美[1] 庹先国[1,2] 成毅[1] 李哲[1] 刘春来[1] 

机构地区：[1]地学核技术四川省重点实验室,成都理工大学610059 [2]地球探测与信息技术教育部重点实验室,成都理工大学610059

出　　处：《核电子学与探测技术》2010年第11期1512-1515,1524,共5页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金(40974065);科技部创新方法工作专项子题(2008IM021500);科技厅科技成果转化项目(2008GZ0197)

摘　　要：针对真空度对α能谱分析中峰位、能量分辨率及探测效率的影响,开展了基于自主研发的便携式α谱仪真空度影响特征试验研究,在保证其它实验条件一致的情况下,对六种真空状态下的239Pu标准面源进行了测试。结果表明,α能谱峰位、能量分辨率与真空度呈线性关系,随真空度增大,能谱峰位线性增加,能量分辨率随之线性变好;探测效率随真空度指数规律增加。根据上述测量结果,分别建立了三者与真空度之间的影响特征方程。建议在工作条件允许的情况下,加大真空度,提高谱仪性能。For the influence of vacuum level on peak position,energy resolution and detection efficiency in α Spectrum analysis,the experimental study based on self-developed portable α spectrometer was carried out.Given other experimental conditions consistency,we tested 239Pu standard source on the impact of six kinds of vacuum level.The results show that,α spectrum peak channel and energy resolution have linear relationships with vacuum degree,both of them increase linearly with vacuum level,detection efficiency increases exponentially with it.Meanwhile,according to measured results,the characteristic equations were established respectively.The proposal is that,in working conditions permitting,we can increase vacuum level,improve the performance of α spectrometer.

关 键 词：α能谱分析 真空度 峰位 能量分辨率 探测效率 

分 类 号：TL817[核科学技术—核技术及应用]