Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1986-11-21
1988-08-16
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
250363R, 250368, G01T 120
Patent
active
047646772
ABSTRACT:
A scintillation detector is provided which has a scintillation member comprised of a substance which converts energy received in the form of an ionizing particle to light. The scintillation member, such as a thallium-activated alkali halide crystal, is sealed in a housing containing an atmosphere which is substantially non-reactive to the scintillation member at temperatures ranging from about 100.degree. C. to about 250.degree. C. Examples of suitable atmospheres include the noble gases including helium, neon argon, krypton, xenon and radon; nitrogen; carbon dioxide, a vacuum, and other atmospheres, such as mixtures of these or air which has been substantially depleted of oxygen. Processes for the manufacture of the detector are taught where the scintillation member is encapsulated in a non-reactive atmosphere such as ones listed above. Alternatively, the reactive atmosphere can be washed from the housing or the sealed housing can be evacuated and refilled with a non-reactive atmosphere.
REFERENCES:
patent: 3950646 (1976-04-01), Whitlock
patent: 4004151 (1977-01-01), Novak
patent: 4158773 (1979-06-01), Novak
patent: 4177378 (1979-12-01), Stevens
patent: 4360733 (1982-11-01), Novak et al.
patent: 4383175 (1983-05-01), Toepke
Baron et al., "A Gas Scintillation Detector for Soft X-Radiation", Instruments and Experimental Techniques, USSR, vol. 17, No. 3, pt. 1, pp. 693-695, Patent Associated Literature--May 1974.
Fowler et al., "Experimental Flight of a Large Spherical Gas Scintillator", Nuclear Instruments and Methods, vol. 119, No. 2, pp. 381-387, Jul. 1974.
Northrop et al., "Relative Scintillation Efficiencies of Noble Gas Mixtures", 10/1958, Nuclear Instruments, pp. 207-212.
Andresen et al., "A Sealed Xenon Gas Scintillation Proportional Counter for X-ray Astronomy", 2/1976, IEEE Transactions on Nuclear Science, vol. NS-23, No. 1, pp. 473-475.
Bicron Corporation
Howell Janice A.
Rauchholz William F.
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