The

P. De Felice, Xh. Myteberi

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Abstract

A212Rn Reference Measurement System was recently developed at ENEA. The system is based on a radon transfer and counting system calibrated by a226Ra standard liquid solution. The reference counting instrument is a cylindrical electrostatic cell with a Si detector. It is used for the detection of the electrostatically collected218Po ions produced in the decay of222Rn. The activity of222Rn gas in a spherical glass bulb can be measured in the Reference Measurement System by a particular procedure that does not require volume determinations or any assumption of total radon removal from the liquid226Ra solution. The combined uncertainty estimated for the calibration of222Rn sources as in a typical gas transfer system is about 1% (one standard deviation). The Reference Measurement System and the operational procedure adopted by ENEA are described together with a short outline of the transfer instrument based on a Nal(Tl) well-type detector used for calibration purposes.
Original languageEnglish
Pages (from-to)445 - 451
Number of pages7
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume369
Issue number2-3
DOIs
Publication statusPublished - 1 Feb 1996
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation

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