RADEX: an active monitor for continuous measurement of /sup 222/Rn flux in soil
A radon exhalation monitor, RADEX, was developed at the Environmental Measurements Laboratory. RADEX is an active radon monitor that continuously samples radon gas emanating from the soil. A hemispherical accumulator is placed on the soil and radon gas is drawn into the RADEX counter at a low, controlled flow rate. As /sup 222/Rn decays, the resulting radon daughters are focused by an electrostatic field, deposited directly onto a semiconductor detector, and counted. RADEX's ability to detect rapid changes in radon exhalation is made possible by analyzing RaA alphas with fast decay times. The pulses produced by the radon daughters are integrated hourly and are recorded. This system can operate unattended for 1 week, at which time a desiccant column must be changed. Thus, RADEX allows one to observe and to record continuously the radon flux from the soil. 8 references, 10 figures, 1 table.
- Research Organization:
- USDOE Environmental Measurements Lab., New York
- OSTI ID:
- 6822316
- Report Number(s):
- EML-428; ON: DE84014122
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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EMANOMETERS
DESIGN
RADON 222
SOILS
ALPHA DECAY RADIOISOTOPES
DAYS LIVING RADIOISOTOPES
EVEN-EVEN NUCLEI
HEAVY NUCLEI
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MEASURING INSTRUMENTS
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RADON ISOTOPES
440101* - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments