Study of the liquid-methane ionization chamber

Hiroki Tanaka, Tetsuya Ariyoshi, Takeshi Uemura, Hidehiko Arima, Keisuke Maehata, Kenji Ishibashi, Yuzuru Matsumoto

Research output: Contribution to journalArticle

Abstract

A liquid-methane ionization chamber has potential for high-efficiency neutron detection. As a preliminary study, we constructed a liquid-methane ionization chamber to examine the response to γ-rays, α particles and neutrons. The chamber consisted of three disk-shaped parallel-plate electrodes immersed in liquid methane. Pulse height distributions were obtained using a charge-sensitive preamplifier to detect γ-rays emitted from 60Co, 22Na and 137Cs sources. The concentration of oxygen, an impurity in the liquid methane, was evaluated using an inverse electric-field method that made use of the large collection characteristics of ionized electrons generated by γ-rays. The response of the liquid-methane chamber to γ-rays was analyzed by searching for the position of the Compton-edge in the pulse-height distributions obtained for γ-rays of 1275 and 662 keV emitted by 22Na and 137Cs, respectively. The full-energy peak appeared in the pulse-height distribution of the output signals for the detection of α particles emitted by 241Am. A continuous pulse-height distribution was observed for neutrons emitted from an Am-Be source.

Original languageEnglish
Pages (from-to)613-621
Number of pages9
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume539
Issue number3
DOIs
Publication statusPublished - Mar 1 2005

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Liquid methane
Ionization chambers
ionization chambers
pulse amplitude
rays
methane
liquids
Neutrons
neutrons
chambers
preamplifiers
parallel plates
Electric fields
Impurities
impurities
Electrodes
Oxygen
electrodes
electric fields
Electrons

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation

Cite this

Study of the liquid-methane ionization chamber. / Tanaka, Hiroki; Ariyoshi, Tetsuya; Uemura, Takeshi; Arima, Hidehiko; Maehata, Keisuke; Ishibashi, Kenji; Matsumoto, Yuzuru.

In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 539, No. 3, 01.03.2005, p. 613-621.

Research output: Contribution to journalArticle

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