Development of a continuous radon concentration monitoring system in underground soil

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

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

Abstract

A continuous radon (Rn-222) concentration monitoring system in underground soil was developed and tested. The system consists of 19mm diameter, 1100mm long detector and a microprocessor based data logger. A small volume chamber is installed at the tip of the detector part. In the chamber, a thin ZnS(Ag) scintillator film 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. Energy resolution of approximately 70% full width half maximum (FWHM) was obtained for 5.5MeV alpha particles from Am-241. Both rise time and fall time of the system were measured to be approximately 1 to 2 hours. Time variations of the radon concentration in different depth of the underground soil were successively obtained using the four sets of the developed system. With these results, it is confirmed that the developed system is useful for continuous measurements of radon concentration in underground soil.

Original languageEnglish
Pages6/313-6/316
Publication statusPublished - 2000
Externally publishedYes
Event2000 IEEE Nuclear Science Symposium Conference Record - Lyon, France
Duration: 2000 Oct 152000 Oct 20

Conference

Conference2000 IEEE Nuclear Science Symposium Conference Record
Country/TerritoryFrance
CityLyon
Period00/10/1500/10/20

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Radiology Nuclear Medicine and imaging

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