Nuclear Techniques ›› 2016, Vol. 39 ›› Issue (7): 70202-070202.doi: 10.11889/j.0253-3219.2016.hjs.39.070202

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Impact of different filters for measuring α radioactive aerosol energy spectrum

XIA Yuan, ZENG Guoqiang, GU Yi, LAI Maolin, ZHANG Kaiqi, WANG Tao   

  1. College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu 610059, China
  • Received:2016-03-20 Revised:2016-04-24 Online:2016-07-10 Published:2016-07-08
  • Supported by:

    Supported by National Natural Science Foundation of China (No.41474159, No.41204090), Youth Fund Projects of Sichuan Province (No.2015JQO035)

Abstract:

Background: Filters are important parts of α radioactive aerosol measurement system. The characters of different filters causing energy peak tailing will interfere the result of artificial radioactive aerosol measurement, or might even make results failure. Purpose: The work aims to test peak tailing of different filters in measuring α radioactive aerosol energy spectrum. Methods: The research collects α radioactive aerosol on different filters by aerosol sampling device and uses α spectrometer to measure peak tailing of 214Po (7.68 MeV). Results: The results show that the peak tailing is minimized when hybrid filters with pore size of 0.45 μm was adopted. When high-flow system is applied, the filters' pore size are expected to be reduced to 0.3 μm. Hybrid fibers are better than PTFE (Polytetrafluoroethylene) and PES (Polyethersulfone) filters in reducing peak tailing with the same pore size (0.45μm). Conclusion: The research provides important basis on how to select filters to reduce peak tailing in measuring α radioactive aerosol energy spectrum.

Key words: Radioactive aerosol, Filter membrane, Peak tailing, &alpha, energy spectrum

CLC Number: 

  • TL84