Nuclear Techniques ›› 2016, Vol. 39 ›› Issue (6): 60402-060402.doi: 10.11889/j.0253-3219.2016.hjs.39.060402

• NUCLEAR ELECTRONICS AND INSTRUMENTATION • Previous Articles     Next Articles

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

LI Yang1,2, XIA Xiaobin1, CAO Zhen1, WANG Guanghong1, XU Xiuqing1,2, ZHAO Yuhang1   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-03-07 Revised:2016-03-29 Online:2016-06-10 Published:2016-06-12
  • Supported by:

    Supported by Strategic Priority Research Program of Chinese Academy of Sciences (No.XDA02050100)

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·L-1, 6.25 mol·L-1, and 7 mol·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·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.

Key words: CR-39, Solid state nuclear track detector (SSNTD), Neutron detection, Chemical etching, Orthogonal design test

CLC Number: 

  • TL815.7