Radiant energy – Invisible radiant energy responsive electric signalling – With means to inspect passive solid objects
Patent
1977-09-22
1979-10-16
Smith, Alfred E.
Radiant energy
Invisible radiant energy responsive electric signalling
With means to inspect passive solid objects
250255, G01N 2300, G01V 500
Patent
active
041714857
ABSTRACT:
An apparatus for analyzing the spectral data in an elemental analyzer measuring gamma rays arising from neutron capture in bulk substances is disclosed. The formation of optimally-weighted linear sums of the number of counts in various portions of the energy spectrum of neutron-capture gamma rays improves measurement accuracy in an apparatus for on-line elemental analysis of bulk substances. Within the apparatus, the analyzed bulk substance is exposed to neutrons, and neutron capture generates prompt gamma rays therefrom. A detector interacts with some of these gamma rays to produce electrical signals used to convert their energy spectrum to digital form by pulse-height analysis. A small computer uses this digitized spectrum to construct the weighted linear sums corresponding to at least one interesting element. Generally, several elements are measured, and the computer forms ratios between the elemental sums to provide relative concentration measurements which are independent of absolute counting rates. The instrument also contains a calibration plug to verify performance, a digital data link to allow the computer to be remote from the gamma-ray detector and devices to display the results of the measurement and/or to communicate them to external equipment. Measurement of an element principally present in the instrument structure permits the computer to correct the measurement of an interesting element in the bulk substance for its presence in the structure.
REFERENCES:
patent: 3053388 (1962-09-01), Tittle
patent: 3676675 (1972-07-01), Ransohoff et al.
Doble Arthur V.
Howell Janice A.
MDH Industries Inc.
Smith Alfred E.
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