Directional gamma ray monitor

Details Directional gamma ray monitor Directional gamma ray monitor

1985-02-04

1987-06-23

Howell, Janice A.

Radiant energy

Calibration or standardization methods

250374, 2505051, G01D 1800, G01T 118

Patent

active

046755233

ABSTRACT:
A directional gamma ray monitor is based on a method for measuring the gamma ray flux within a small solid angle. The method entails measuring the flux incident on a detector 36, measuring the flux incident on the detector 36 when behind a shielding block 50, which is arranged to subtend the said small solid angle with the detector 36, and determining the difference between the two measurements. In an apparatus for carrying out the method, the shielding block 50 is moved between a position when it is on the axis of a gamma ray detector 36 and a position where it is displaced from the axis of the gamma ray detector 36.

REFERENCES:
patent: 3529153 (1970-09-01), Zimmerman et al.
patent: 4424443 (1984-01-01), Reuland
Morfill, G., "A Directional Low Energy Gamma-Ray Detector", Proc. Conf. on Transient Cosmic Gamma and X-Ray Sources (1974), p. 206.
Benson, J., " . . . Passively Anti-Collimated (PAC) Gamma-Ray Telescope", North-Holland Publishing Co. (1981), pp. 613-617.

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