Radon progeny detector

Details Radon progeny detector Radon progeny detector

1989-03-20

1990-10-16

Hannaher, Constantine

Radiant energy

Geological testing or irradiation

250432R, G01V 500, G01N 2101

Patent

active

049637304

ABSTRACT:
A radon progeny detector for measuring the concentration of attached and unattached fractions in an atmosphere. A laminar flow of air is drawn sequentially through a diffusion screen and a particle trap. Unattached progeny having a particle size of 10 nm or less are captured upon the mesh of the diffusion screen. Attached progeny pass into the trap where the attached progeny are captured by a filter. Radiation detecting strips for recording radiation from alpha and beta particles emitted by the progeny are mounted on both sides of the diffusion screen and adjacent the particle trap to record the concentrations of both fractions.

REFERENCES:
patent: 3614421 (1971-10-01), Alter et al.
patent: 3665194 (1972-05-01), Alter et al.
patent: 3922555 (1975-12-01), Chapuis et al.
patent: 4185199 (1980-01-01), Droullard et al.
patent: 4385236 (1983-05-01), Hassib et al.
patent: 4518860 (1985-05-01), Alter et al.
patent: 4704537 (1987-11-01), Urban et al.
patent: 4801800 (1989-01-01), Scheible
patent: 4847503 (1989-07-01), Tetley et al.

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