Method and apparatus for determining random coincidence count rate in a scintillation counter utilizing the coincidence technique
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United States of America Patent
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Jan 1, 1980
Grant Date -
N/A
app pub date -
Jan 30, 1978
filing date -
Jan 30, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and related apparatus for the reliable determination of a random coincidence count attributable to chance coincidences of single-photon events which are each detected in only a single detector of a scintillation counter utilizing two detectors in a coincidence counting technique. A first delay device is employed to delay output pulses from one detector, and then the delayed signal is compared with the undelayed signal from the other detector in a coincidence circuit, to obtain an approximate random coincidence count. The output of the coincidence circuit is then applied to an anti-coincidence circuit, where it is corrected by elimination of pulses coincident with, and attributable to, conventionally detected real coincidences, and by elimination of pulses coincident with, and attributable to, real coincidences that have been delayed by a second delay device having the same time parameter as the first.
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- Non-US Classification not provided for expired patents
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