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中国科学院上海原子核研究所
收稿日期:1981-03-18,
纸质出版日期:1982-06
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陈学诗, 周生墨, 张怡萍, 等. 14MeV中子缓发X射线分析[J]. 核技术, 1982,05(3):38-39,42.
Xueshi Chen, Shengmo Zhou, Yiping Zhang, et al. The 14MeV neutron induced characteristic X-ray analysis[J]. Nuclear techniques, 1982, 05(3): 38-39,42.
14MeV快中子活化分析已在矿样、地质、考古和生物等样品的分析工作中获得了广泛的应用。一般来说,在10
9
n/cm
2
•s通量的条件下,14MeV快中子活化分析的测量灵敏度可达0.1~1mg。但是快中子引起的γ谱,包括基体引起的在内,一般都比较复杂,而且有些生成核能级的
K
电子俘获或内转换系数又特别大,由此发射的特征X射线数目比γ跃迁发射的γ射线数目大很多,即X/γ的值很大。对于这些核素,我们可测量它的缓发X射线谱,它比γ谱清晰得多,预计分辨能力也会更好些。
The possibility of measuring characteristic X-rays
emitted following IT or EC decay
for element analysis in 14 MeV neutron activation was investigated. The mass sensitivity was evaluated to 0.1~1 mg for most elements. X-ray spectra from Rh
Ag
Cd and In were observed clearly. This technique is particularly advantageous for those nuclides of which the IT or EC ratio is large and for those samples of which the matrix consists of light elements and which contain a considerable number of intermediate or heavy element to be detected.
J. Janczyszyn and S. Kwiecinski , J. Radioanal. Chem. , 56 , 1-2 , 153 ( 1980 ).
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