Collapsible detector for short and long term measurements of rad

Details Collapsible detector for short and long term measurements of rad Collapsible detector for short and long term measurements of rad

1990-04-10

1991-12-03

Hannaher, Constantine

Radiant energy

Invisible radiation responsive nonelectric signalling

250253, 250255, G01T 100

Patent

active

050702475

ABSTRACT:
The device is a collapsible alpha track registration detector which will cost less to use and which can be used for measuring radon concentration over short and long term exposure times. The device includes a collapsible housing, defining an interior volume, in which is a strip of track registration material which forms damage tracks along paths traversed by alpha particles emitted during radioactive decay. The strip is retained within the housing on a cardboard holder to locate the strip at a predetermined location within the housing. The housing is a combination of a gusseted plastic bag and cardboard such that when collapsed it is a flat container but when in use it appears as a prism. The selected cardboard and plastic bag block particles and radon daughter products while admitting air and radon to the interior of the housing. The plastic bag has a hole to allow air to enter when being placed in use but the hole is sealed to one of the cardboard faces which prevents unwanted leakage. The detector includes a data form for entry of exposure information. The device with instructions will fit into a standard business envelope. Following use, the apparatus can become the return mailer.

REFERENCES:
patent: 4518860 (1985-05-01), Alter et al.
patent: 4847494 (1989-07-01), Alvarez

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