A liquid scintillation nuclear activity metrology instrument

Zhangzhi Wang; Hanmin Chen; Ruiqin Chen; Yunxia Lan

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A liquid scintillation nuclear activity metrology instrument

更新时间：2022-09-13

- A liquid scintillation nuclear activity metrology instrument
- Nuclear Techniques Vol. 09, Issue 6, (1986)
- 作者机构：
  
  中国科学院上海原子核研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：22 December 1985，
  
  Published：1986-06
- 稿件说明：
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Zhangzhi Wang, Hanmin Chen, Ruiqin Chen, et al. A liquid scintillation nuclear activity metrology instrument[J]. Nuclear techniques, 1986, 09(6): 4-9,58.
DOI：

Zhangzhi Wang, Hanmin Chen, Ruiqin Chen, et al. A liquid scintillation nuclear activity metrology instrument[J]. Nuclear techniques, 1986, 09(6): 4-9,58. DOI：

摘要

本文描述用液体闪烁计数法直接测定

、

发射体溶液放射性活度的计量仪器。该仪器包括三个光电倍增管的符合探测器和三个输出计数道；以三重对两重符合计数率之比（TDCR）为猝灭参数，通过外推效率曲线至TDCR=1直接得到核素的活度。该仪器用于放射性活度绝对测量至少有两个突出的优点：1．精确度较高，对

H、

Ni和

C等多种

、

核素其总测量不确定度（3σ）在0.5—1.5%；2．操作简便，测量迅速。

Abstract

A new precise instrument for determination of the absolute disintegration of β

α emitter solutions by the method of liquid scintillation counting is described. The instrument includes a triple phototube liquid scintillation detector and three output counting channels which are used for the number of triple coincidences Nc

the number of sum of double coincidences N

and the number of sum of single phototube counting N

seperately. This instrument is based on the principle of extrapolating the triple to double coincidence ratio (TDCR) to unity.

Examples of application of the instrument for

H and

C are given.

The instrument has two main advantages: 1. Higher accuracy. The overall measurement uncertainty(3σ)

for

S and

C etc. is in 0.5—1.5%. 2. Easy to operate. The measurement time is much less than usual metrology instrument.

关键词

Keywords

references

蓝云霞和李铭尧，核技术， 5 ， 1 （ 1986 ）。

K. Pochwalski and T. Radoszewski , Rep. Inst. Nucl. Res. Swierk, 1848/OP 1 DI/E/A （ 1979 ）.

王楚和吴学周，核电子学与探测技术， 5 ， 4 , 204 （ 1985 ）。

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