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|dc.description.abstract||1H- or 4He-contained gas mixtures are usually used to detect fast neutrons, which relies on elastic scattering between fast neutrons and light gas molecules. In this research, gas mixtures of 4He/CO2 (80:20 and 70:30) and 4He/CO2/C4H10 (70:23:7) were flowed through a 10 cm×10 cm triple-Gas Electron Multiplier (GEM) detector at a constant flow rate of 3.0 L/hr in order to detect fast neutrons. Comparisons of relative efficiencies, relative gains, and detection uniformity for all gas types were investigated by measuring signal counts and signal amplitudes. Results showed that a gas mixture of 4He/CO2 (80:20) had the highest relative efficiency and relative gains amongst all gas mixture types. In terms of detection uniformity, detection efficiency at the center of the active area was approximately 20% higher than areas close to the detector edges. Details of basic knowledge of GEM, experimental procedures, results and discussion are included in this article.||en_US|
|dc.publisher||Science Faculty of Chiang Mai University||en_US|
|dc.title||Comparative Study of a GEM-based Fast Neutron Detector Using 4He/CO2 and 4He/CO2/C4H10 Gas Mixtures||en_US|
|article.title.sourcetitle||Chiang Mai Journal of Science||en_US|
|article.stream.affiliations||Department of Applied Radiation and Isotopes, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand.||en_US|
|article.stream.affiliations||Department of Physics, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand.||en_US|
|article.stream.affiliations||Thailand Center of Excellence in Physics, CHE, Bangkok, 10400, Thailand.||en_US|
|Appears in Collections:||CMUL: Journal Articles|
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