Energy filter for a Geiger-Muller tube

Details Energy filter for a Geiger-Muller tube Energy filter for a Geiger-Muller tube

1984-01-12

1986-08-26

DeMeo, Palmer C.

Electric lamp and discharge devices

Geiger-mueller type

313112, H01J 4706, H01J 518

Patent

active

046085114

ABSTRACT:
A gamma ray energy filter for a improving the uniformity of response of a Geiger-Muller tube comprises only two spaced filter bodies. To improve the uniformity of the energy response, the two filter bodies consist of a lead/tin alloy containing substantially less than 95% but not substantially less than 40%, and suitably 50-60%, of lead. To improve the polar response particularly in directions away from the normal to the longitudinal axis of the tube, and at quite low energies, adjacent edges of the filter bodies are inclined to the longitudinal axis over a majority of their radial thickness at less than 45.degree., and circumferentially-spaced apertures with axes inclined to the longitudinal axis are provided in at least one of the bodies.

REFERENCES:
patent: 4501989 (1985-02-01), von der Brake

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