Radiant energy – Invisible radiant energy responsive electric signalling – Semiconductor system
Patent
1976-10-06
1978-08-01
Borchelt, Archie R.
Radiant energy
Invisible radiant energy responsive electric signalling
Semiconductor system
250255, 250364, G01T 122
Patent
active
041045238
ABSTRACT:
There is provided an improved radon-222 detector device for counting alpha particles originating from radon-222 gas including an alpha particle permeable window in one end of a body and a surface barrier type semiconductor detector adjacent thereto and spaced from the window, and characterized by a moisture attenuating means adjacent the window and the detector.
REFERENCES:
patent: 3056886 (1962-10-01), Glaude et al.
patent: 3558884 (1971-01-01), Babich et al.
patent: 3968371 (1976-07-01), Greendale
Borchelt Archie R.
Martin Marietta Corporation
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