Online ISSN: 1884-4111 Print ISSN: 0033-8303
Radioisotopes 66(6): 207-216 (2017)


放射線教育実験に有用な針陽極空気GM管の特性Characteristics of Air GM Counter with Needle Anode Suitable for Radiation Education Experiment

1愛知工業大学Aichi Institute of Technology ◇ 470–0392 愛知県豊田市八草町八千草1247 ◇ 1247 Yachigusa, Yagusa-cho, Toyota-shi, Aichi Pref. 470–0392, Japan

2名古屋大学Nagoya University ◇ 464–8603 愛知県名古屋市千種区不老町 ◇ Furou-cho, Chikusa-ku, Nagoya, Aichi Pref. 464–8603, Japan

3中部原子力懇談会Chubu Atomic Power Conference ◇ 468–0008 愛知県名古屋市中区栄2–10–19 名古屋商工会議所6F ◇ 2–10–19 Sakae, Naka-ku, Nagoya, Aichi Pref. 468–0008, Japan

4春日井市立松原中学校Kasugai Municipal Matsubara Junior High School ◇ 486–0803 愛知県春日井市西山町3–838 ◇ 3–838 Nishiyama-cho, Kasugai-shi, Aichi Pref. 486–0803, Japan

受付日:2016年5月30日Received: May 30, 2016
受理日:2017年1月25日Accepted: January 25, 2017
発行日:2017年6月15日Published: June 15, 2017


A new GM counter was developed, which used air as counting gas, ethanol vapor as quenching gas, darning needle as anode, and plastic case with conductive paper as cathode. The characteristics of the performance of this counter were investigated by the calculation of gas gain together with equipotential curves around the needle tip and by the experimental results such as plateau curves and detection efficiencies depending on the incident position of β-rays into the counter and on the distance from the window to the needle tip. This counter is very easy to fabricate and has stable counting performance. It is therefore useful for radiation education experiments.

Key words: GM counter; air; needle anode; ethanol; quenching gas; handmade; plateau characteristics; detection efficiency; radiation education; operation mechanism

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