Low background α, β simultaneous measurements using single proportional counter

Zhangzhi Wang; Weizhi Lü; Shuilong Wu; Yongkang Zhu; Yongkang Tan

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Low background α, β simultaneous measurements using single proportional counter

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- Low background α, β simultaneous measurements using single proportional counter
- Nuclear Techniques Vol. 05, Issue 2, (1982)
- 作者机构：
  
  1.中国科学院上海原子核研究所
  2.上海市卫生防疫站
  3.上海市计量技术研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：16 December 1981，
  
  Published：1982-04
- 稿件说明：
移动端阅览
Zhangzhi Wang, Weizhi Lü, Shuilong Wu, et al. Low background α, β simultaneous measurements using single proportional counter[J]. Nuclear techniques, 1982, 05(2): 9-12,21.
DOI：

Zhangzhi Wang, Weizhi Lü, Shuilong Wu, et al. Low background α, β simultaneous measurements using single proportional counter[J]. Nuclear techniques, 1982, 05(2): 9-12,21. DOI：

摘要

本文介绍用单个流气式多丝正比计数管进行α、β同时测量的新方法，它与同类型产品采用复合管的方法比较，测量效率较高。例如探测

Sr-

Y的效率大于80%（2x），本底小于1cpm；探测

239

Pu的效率大于75%（2x），本底小于0.05cpm。在一般低水平样品测量时间内（如60min），仪器可探测的最低水平为4×10

-13

Ci。

Abstract

A new method

by which we use single gas-flow multi-wire proportional counter for

αβ

simultaneous measurements

is recommended. Its measuring efficiency is higher than that of same kinds of products using multiple counters. For example

the detecting efficiency for

Sr-

Y is more than 80% (2π)

with the background less than 1cpm; the detecting efficiency for

239

Pu is more than 75% (2π)

with the background less than 0.05cpm. The lowest level the instrument can detect is 4×10

-13

Ci during the measuring period for general low level samples (for example 60 minutes).

关键词

Keywords

references

国营262厂，多阳极丝流气式正比计数管在低水平测量中的应用，全国核探测器和核电子学会议资料， 1979 年．

P. J. Campion , Nucl. Instr. Meth. , 112 , 75 （ 1973 ）.

王章智等，正比计数管中后脉冲的抑制，上海原子核学会1981年年会论文摘要汇编，7003 .

Numelec , NU-15 very low alpha and beta activity measurement , 1980 .

国际辐射防护委员会第22号报告，原子能出版社， 1974 年．

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