Method and apparstus for determining random coincidence count rate in a scintillation counter utilizing the coincidence technique

Patent · Tue Jan 01 04:00:00 EST 1980

OSTI ID:5540667

Horrocks, D L

A method and 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 are described. A firstdelay 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 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. 8 claims.

• Assignee: Beckman Instruments, Inc.
• Patent Number(s): US 4181855
• OSTI ID: 5540667
• Country of Publication: United States
• Language: English

Related Subjects

440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
AMPLIFIERS
COINCIDENCE CIRCUITS
COUNTING RATES
DELAY CIRCUITS
DESIGN
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
MEASURING INSTRUMENTS
RADIATION DETECTORS
SCINTILLATION COUNTERS