Apparatus for reducing pulse pileup in an elemental analyzer mea

Details Apparatus for reducing pulse pileup in an elemental analyzer mea Apparatus for reducing pulse pileup in an elemental analyzer mea

1977-07-05

1979-05-01

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

With means to inspect passive solid objects

250390, 328117, G01N 2300

Patent

active

041525965

ABSTRACT:
The active reduction of the number of analyzed events with pulse amplitudes which pileup has distorted improves measurement accuracy and response time in an apparatus for neutron-capture-based 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 measure their energy spectrum by pulse-height analysis. Circuits associated with this pulse-height analysis also detect the pileup of the signals of two or more independent gamma rays using one or more of several techniques. These techniques include multiple outputs from a special amplifier-discriminator system, which has been optimized for low pulse-pair resolving time and may have adaptive thresholds, and the requirement that the relative amplitudes of the outputs of slow and fast amplifiers be consistent with a single event producing both outputs. Pulse-width measurements are also included in the pileup detection.

REFERENCES:
patent: 3025400 (1962-03-01), Schultz
patent: 3508047 (1970-04-01), Mott et al.
patent: 3508048 (1970-04-01), Starnes

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