Ideal response function of a 3He proportional counter to thermal neutrons determined by different length counters |
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| Affiliation: | 1. Quantum Radiation Division, National Institute of Advanced Industrial Science and Technology (AIST), National Metrology Institute of Japan (NMIJ), 1-1-1 Umezono, Tsukuba-shi, Ibaraki 305-8568, Japan;2. Research Reactor Institute, Kyoto University, Noda, Kumatori, Sennan, Osaka 590-0494, Japan;1. Chemistry Division, Bhabha Atomic Research Centre (BARC), Trombay, Mumbai 400085, India;2. Government College (A), CGNSRC, Department of Physics, Rajhmundry, A.P., India;1. Department of Occupational and Environmental Medicine, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuoku, Chiba 260-8670, Japan;2. Department of Epidemiology and Public Health, Kanazawa Medical University, 1-1 Daigaku, Uchnada, Ishikawa 920-0293, Japan;3. Department of Community Health Nursing, Kanazawa University School of Health Sciences, 5-11-80 Kodatsuno, Kanazawa, Ishikawa 920-0942, Japan;1. Institute of Life Science and Biotechnology, Beijing Jiaotong University, Beijing 100044, China;2. Beijing Institute of Biotechnology, Beijing 100071, China;1. Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Torun, Poland;2. Institute of Physics, Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology, Al. Piastow 17, 70-310 Szczecin, Poland;1. Tokuyama Corporation, 1-1 Mikage-cho, Shunan-shi, Yamaguchi 745-8648, Japan;2. Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu, Kitakyushu, Fukuoka 808-0196, Japan |
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| Abstract: | The gas multiplication distributions along the anode wires of 3He proportional counters with different sensitive lengths of 10, 15 and 20 cm were measured using a collimated thermal neutron beam at the Kyoto University Reactor facility. The ideal response function excluding the effect of electric field distortion near the boundaries of the anode wire was derived by taking into account the difference between pulse height spectra measured by two different length counters. The pulse height spectrum calculated by the NRESPG Monte Carlo code assuming the ideal gas multiplication region showed relatively good agreement with the response function derived from the measurements. Both the energy resolution of the full energy peak at 764 keV and the peak ratio to the entire pulse height spectrum were improved markedly. |
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