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Title: Effect of air on energy and rise-time spectra measured by proportional gas counter

Air exerts a negative effect on radiation detection using a gas counter because oxygen contained in air has a high electron attachment coefficient and can trap electrons from electron-ion pairs created by ionization from incident radiation in counting gas. This reduces radiation counts. The present study examined the influence of air on energy and rise-time spectra measurements using a proportional gas counter. In addition, a decompression procedure method was proposed to reduce the influence of air and its effectiveness was investigated. For the decompression procedure, the counting gas inside the gas counter was decompressed below atmospheric pressure before radiation detection. For the spectrum measurement, methane as well as various methane and air mixtures were used as the counting gas to determine the effect of air on energy and rise-time spectra. Results showed that the decompression procedure was effective for reducing or eliminating the influence of air on spectra measurement using a proportional gas counter. (authors)
Authors:
;  [1] ;  [2] ; ;  [3] ;  [4]
  1. National Institute for Fusion Science, Toki, Gifu (Japan)
  2. IsoShieldJP, Co. Ltd., Kohata, Ufi-shi, Kyoto (Japan)
  3. Radioisotope Research Centre, Kyoto University, Kyoto (Japan)
  4. School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya (Japan)
Publication Date:
OSTI Identifier:
22429728
Resource Type:
Journal Article
Resource Relation:
Journal Name: Fusion Science and Technology; Journal Volume: 67; Journal Issue: 2; Conference: TRITIUM 2013: 10. International Conference on Tritium Science and Technology, Nice Acropolis (France), 21-25 Oct 2013; Other Information: Country of input: France; 5 refs.
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; AIR; ELECTRON ATTACHMENT; ELECTRONS; METHANE; OXYGEN; PROPORTIONAL COUNTERS; RADIATION DETECTION; SPECTRA