Determination of microquantitative U, Ra, Th, K in solid samples by low-energy γ spectrometer

Yanwu Dong; Qirong Zhou

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Determination of microquantitative U, Ra, Th, K in solid samples by low-energy γ spectrometer

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- Determination of microquantitative U, Ra, Th, K in solid samples by low-energy γ spectrometer
- Nuclear Techniques Vol. 10, Issue 6, (1987)
- 作者机构：
  
  北京铀矿选冶研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：14 April 1986，
  
  Published：1987-06
- 稿件说明：
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Yanwu Dong, Qirong Zhou. Determination of microquantitative U, Ra, Th, K in solid samples by low-energy γ spectrometer[J]. Nuclear techniques, 1987, 10(6): 33-35,61,62.
DOI：

Yanwu Dong, Qirong Zhou. Determination of microquantitative U, Ra, Th, K in solid samples by low-energy γ spectrometer[J]. Nuclear techniques, 1987, 10(6): 33-35,61,62. DOI：

摘要

近二十年来，核辐射测量仪器有了很大改进。采用反符合屏蔽技术以及用带有纯NaI光导的低钾NaI（Tl）晶体作主探测器，大大降低了本底和康普顿效应。加之采用大探测器、大样品，同时在保证仪器稳定条件下增加测量时间从而获得了较高灵敏度和较好的精密度。目前，低水平γ射线谱仪、大体积NaI（Tl）晶体多维γ射线谱仪等被广泛地用于地球、海洋、大气、地球外部大样品放射性同位素复杂谱的非破坏测量中

[1-4]

。

Abstract

This paper describes a sort of method measuring microquantitative U

K in solid samples by low energy γ spectrometer and the measured results were given. The weight of sample is 20 grams. The lithology of sample and the effect of selfabsorption is negligible. The accuracy of the method is better than 15% for environmental samples. The detection limit of the method is 2.0×10

-6

g/g

1.6×10

-3

g/g

2.6×10

-7

g/g

3.9× 10

-3

g/g for U

K respectively. The results of measured realistic samples is satisfactory.

关键词

Keywords

references

N. A. Wogman , IEEE Trans. Nucl. Sci. , NS-20 , 1 , 73 ( 1973 ).

R. W. Perkins , Nucl. Instr. Meth. , 33 , 71 ( 1965 ).

N. A. Wogman , Nucl. Instr. Meth. , 50 , 1 ( 1967 ).

J. S. Eldridge et al. , Nucl. Instr. Meth. , 112 , 1-2 , 319 ( 1973 ).

R. V. Rao , Geophs Res. Bull. , 12 , 2 , 91 ( 1974 ).

Nukleonika , 24 , 5 , ( 1979 ).

林莲卿和任天山，环境科学 , 3 , 2 , 44 ( 1982 )。

Ф. Я. Pовинский , Mетоды радиоизотопоного анализа продуктов нейтронной активашии и деления , Mосква, Aтомиздат , 1973 .

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