钐元素Kα荧光能谱及荧光产额的研究  

Research on K_α Energy Spectrum and Fluorescence Yield of Samarium

作　　者：霍彬彬 陈成[2,3] 吴金杰[2] 左国平[1] 张帅[2,4] 李婷[2,3] 

机构地区：[1]南华大学,湖南衡阳421001 [2]中国计量科学研究院,北京100029 [3]成都理工大学,四川成都610059 [4]中国石油大学,北京102200

出　　处：《计量学报》2017年第6期786-789,共4页Acta Metrologica Sinica

摘　　要：针对钐元素的K荧光能谱进行研究分析,利用MCNP程序模拟荧光装置,计算得到荧光产额及荧光纯度随辐射体氧化钐(Sm_2O_3)厚度和次级过滤材料氧化铈(CeO_2)厚度的变化关系:Sm_2O_3厚度为0.4 mm时,K荧光产额达到饱和;CeO_2为0.55 mm时,K_α荧光纯度达到最大值96.6%;实验显示,X光机管电压越大,荧光产额越大;管电压为80 kV时,荧光纯度达到最高82.3%。The relationship between fluorescence quality and thickness of radiator Sm203 or secondary filter CeO2 by simulating fluorescence instrument with MCNP program was described. When the thickness of Sm2 03 reached 0. 4 mm, K fluorescence yield is saturated. When the thickness of CeO2 was 0. 55 mm, Kα fluorescence purity optimum value is 96. 6%. The results show that the higher X-ray tube voltage is, the bigger fluorescence yield is. Fluorescence purity reached optimum 82. 26% when X-ray tube voltage was 80 kV.

关 键 词：计量学 K荧光 K吸收限 蒙特卡洛模拟 

分 类 号：TB98[一般工业技术—计量学]