Development of a continuous radon concentration monitoring system in underground soil

S. Yamamoto*, K. Tarutani, K. Yamasoto, D. Iskandar, T. Iida


研究成果: Conference article査読

8 被引用数 (Scopus)


A continuous radon (Rn-222) concentration monitoring system for use in underground soil was developed and tested. The system consists of a 19-mm-diameter, 1100-mm-long detector assembly and a microprocessor based data logger. A small volume chamber is installed at the tip of the detector assembly. A thin ZnS(Ag) scintillator film inside the chamber and a photomultiplier tube (PMT) detect alpha particles from radon and its daughters. When the system is in measurement, the detector part is buried into underground soil. An energy resolution of approximately 70 % full width half maximum (FWHM) was obtained for 5.5 MeV alpha particles from Am-241. Both the rise time and fall time for the system were measured to be approximately 1-2 h. Temporal variations in underground radon concentration at different depths were investigated simultaneously using four sets of the developed system. The results confirmed that the developed system is useful for continuous measurement of radon concentration in underground soil.

ジャーナルIEEE Transactions on Nuclear Science
3 I
出版ステータスPublished - 2001 6月
イベント2000 Nuclear Science Symphosium (NSS) - Lyon, France
継続期間: 2000 10月 152000 10月 20

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 原子力エネルギーおよび原子力工学
  • 電子工学および電気工学


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