An experimental study on optimal chemical etching condition for CR-39 used in neutron detection

Yang LI; Xiaobin XIA; Zhen CAO; Guanghong WANG; Xiuqing XU; Yuhang ZHAO

doi:10.11889/j.0253-3219.2016.hjs.39.060402

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An experimental study on optimal chemical etching condition for CR-39 used in neutron detection

NUCLEAR ELECTRONICS AND INSTRUMENTATION | 更新时间：2021-05-24

- An experimental study on optimal chemical etching condition for CR-39 used in neutron detection
- NUCLEAR TECHNIQUES Vol. 39, Issue 6, Article number: 060402(2016)
- 作者机构：
  
  1.中国科学院上海应用物理研究所嘉定园区上海 201800
  2.中国科学院大学北京 100049
- 作者简介：
- 基金信息：
  
  Supported by Strategic Priority Research Program of Chinese Academy of Sciences (No.XDA02050100)
- DOI：10.11889/j.0253-3219.2016.hjs.39.060402
  CLC： TL815.7
- Received：07 March 2016，
  
  Revised：29 March 2016，
  
  Published：2016-06
- 稿件说明：
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Yang LI, Xiaobin XIA, Zhen CAO, et al. An experimental study on optimal chemical etching condition for CR-39 used in neutron detection[J]. Nuclear techniques, 2016, 39(6): 060402
DOI：

Yang LI, Xiaobin XIA, Zhen CAO, et al. An experimental study on optimal chemical etching condition for CR-39 used in neutron detection[J]. Nuclear techniques, 2016, 39(6): 060402 DOI： 10.11889/j.0253-3219.2016.hjs.39.060402.

摘要

CR-39化学蚀刻的主要影响因素有蚀刻温度、蚀刻液种类和浓度以及蚀刻时间等。本研究选用英国Track Analysis Systems公司的CR-39

采用正交法对蚀刻温度、蚀刻液浓度、蚀刻时间进行试验研究

并与公司推荐化学蚀刻条件下的径迹图像、径迹密度进行对比

得出的优化蚀刻条件是:蚀刻温度为85℃、NaOH蚀刻液浓度为7 mol

#183;L

-1

蚀刻时间为90 min。实验同时发现蚀刻温度是这三个因素中对化学蚀刻后净径迹密度影响最大的因素

而蚀刻时间的影响最小。该研究为CR-39应用于中子探测提供了更好的蚀刻条件

节省了实验时间。

Abstract

Background

CR-39 is an important solid-state nuclear track detector

which is widely used in neutron detection and environmental monitoring. Chemical etching is usually used to expand the track in the application of CR-39.

Purpose

The paper deals with chemical etching conditions of CR-39 and aims to get an optimal etching condition.

Methods

The three major factors to CR-39 chemical etching are etching temperature

etching time and etchant concentration (NaOH solution was used in this paper)

and they were studied by an orthogonal design test. The etching temperature was 75℃

85℃ and 95℃

respectively; the etching time was 90 min

170 min and 240min

respectively; the etchant concentration was 5.5 mol

#183;L

-1

6.25 mol

#183;L

-1

and 7 mol

#183;L

-1

respectively. Experimental data were analyzed with modified Grubbs rule and compared with the recommended chemical etching condition.

Results

The optimal chemical etching condition for CR-39 used in neutron detection is 7 mol

#183;L

-1

NaOH solution at 85℃ for 90min

which is better than the recommended chemical etching condition.

Conclusion

An optimal chemical etching condition for CR-39 used in neutron detection was provided

and the condition was with less time than the recommended one.

关键词

Keywords

references

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