Compact detector for radon and radon daughter products

Details Compact detector for radon and radon daughter products Compact detector for radon and radon daughter products

1987-05-20

1989-09-19

Hannaher, Constantine

Radiant energy

Geological testing or irradiation

2504721, G01V 500

Patent

active

RE0330655

ABSTRACT:
A compact low cost track registration detector for radon gas and radon daughter products includes a housing with a removable closure cap for retaining a strip of track registration material having the property of forming damage tracks along paths traversed by alpha particles. The strip is retained within the housing by integrally formed upstanding ribs located closely adjacent diametrically opposite inner side wall portions of the housing, a first set of ribs forming a pedestal support and second set of longer ribs providing transverse support. A microporous filter impervious to particles and radon daughter products admits only radon gas to the interior of the housing. The apertured closure cap has a central solid portion providing a radiation shield for the upper surface of the strip to enable the lower exposure surface to be readily distinguished after the detector has been retrieved from an exposure site. The housing is fabricated from a pure polyethylene material free from any residual alpha particle radiation. A flexible strip wrapped about the exterior of the housing affords both a hanging strap and an information sheet for user entry of exposure information.

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M. Urban and E. Piesch, "Low Level Environmental Radon Dosimetry With a Passive Track Etch Detector Device", Radiation Protection Dosimetry, vol. 1, No. 2, (1981), pp. 97-109.
Chruscielewski et al., "The Performance of Passive Differentiating Track Detectors Containing a Diffusion Barrier", Radiation Protection Dosimetry, vol. 2, No. 1, pp. 27-32, (1981).
Urban, M., "Passive One-Element Track Etch Dosemeter for Simultaneous Measurement of Radon, Thoron and Decay Products in Air", Nuclear Tracks, vol. 12, Nos. 1-6, pp. 685-688, 1986.
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