Radiant energy – Invisible radiant energy responsive electric signalling – Neutron responsive means
Patent
1987-02-12
1988-08-23
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
Neutron responsive means
250391, G01N 2322, G01N 23222
Patent
active
047663197
ABSTRACT:
The nuclear moisture-density gauge of the present invention employs a low activity neutron radiation source and a low activity gamma radiation source. In order to achieve more accurate density measurements at the relatively low count rates which results from the use of a low activity gamma source, the present invention is provided with means for generating a correction signal which is a function of the moisture content of the test material and which represents the amount of gamma radiation emitted from the test material resulting from the neutron capture reaction due to the presence of neutron capture elements, such as hydrogen, present in the test material. This correction signal is applied to the uncorrected density signal obtained from the gauge to thereby obtain a corrected density measurement which is unaffected by background gamma radiation caused by the presence of neutron capture elements in the test material. The gauge is also provided with means for correcting naturally occurring background gamma radiation from the test material.
REFERENCES:
patent: 2781453 (1957-02-01), Belcher et al.
patent: 3072790 (1963-01-01), Hopkinson et al.
patent: 3544793 (1970-12-01), Bless et al.
patent: 4028267 (1977-06-01), Christell et al.
patent: 4152600 (1979-05-01), Berry
patent: 4424444 (1984-01-01), Smith, Jr. et al.
patent: 4525854 (1985-06-01), Molbert et al.
patent: 4542472 (1985-09-01), Toms
patent: 4581599 (1986-04-01), Toms
Volarovich et al., "Use of the Neutron-Gamma Method to Determine the Bulk Density and Moisture of Peat", 5/1974, pp. 406-408.
Howell Janice A.
Rauchholz William F.
Troxler Electronic Laboratories, Inc.
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