Development of a Small-Sized Radon Data Logger

A small-sized radon data logger and a electrostatic collecting radon monitor were developed for the continuous monitoring of environmental radon and radon daughters. A PIN photodiode (PD), an alpha particle detector, installed inside a container attracts radon daughters when charged electrostaticall...

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Bibliographic Details
Published inRADIOISOTOPES Vol. 45; no. 12; pp. 741 - 752
Main Authors TASAKA, Shigeki, SASAKI, Yoshimi
Format Journal Article
LanguageJapanese
Published Japan Radioisotope Association 15.12.1996
Subjects
data logger
electrostatic collection
PIN photo diode
radon
radon concentration
radon daughter
radon monitor
Super-Kamiokande
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Summary:A small-sized radon data logger and a electrostatic collecting radon monitor were developed for the continuous monitoring of environmental radon and radon daughters. A PIN photodiode (PD), an alpha particle detector, installed inside a container attracts radon daughters when charged electrostatically. Alpha particles are completely separated from each other according to the energy level. New logger has made it possible to analysis and save the radon data. Alpha particle count data from radon daughters are automatically integrated over preset time intervals and the energy regions. The desiccant P2O5 was placed in the bottom of the monitor, since the collection efficiency of 218Po atoms depends on the humidity of the air. We can get the 30 days continuous data logging at 30 min sampling frequency at any place with the car battery. We observed the radon concentration of the air inside the Super-Kamiokande dome from Jan-30 to Feb-8-1996. The average of radon concentration was found to be (46±13) Bq/m3.
ISSN:0033-8303
1884-4111
DOI:10.3769/radioisotopes.45.12_741