FURTHER COMMENTS ON ACCIDENTAL COINCIDENCES IN FAST-SLOW COINCIDENCE SYSTEMS

Journal Article · Thu Jun 01 04:00:00 EDT 1961 · Nuclear Instr. & Methods

DOI:https://doi.org/10.1016/0029-554X(61)90131-8· OSTI ID:4005727

Shera, E B

In the determination of the accidental coincidence rate in two-fold fast- slow coincidence systems by Mayer-Kuckuk and Nierhaus, a correction must be made in using their method for calculating the chance rate of a two-fold fastslow circuit since their calculations apply to a three-fold circuit. In a two-fold system a term is needed for the finite resolving time of the fast coincidence circuit. This term is N/sup 12/ = 2t/sub f/N/sub 1/N/sub 2/, where 2t/sub f/ is the resolving time of the fa st coincidence circuit and N/sub 1/N/sub 2/ are the counting rates from the amplitude selectors. This term can be determined by inserting an appropriate delay in either input to the fast coincidence circuit. When estimating the nnagnitudes of the remaining accidental terms, those derived by MayerKuckuk and Nierhaus, the effect of dead times in the detectors and electronic circuitry before the slow coincidence circuit should not be neglected just in case the detector or circuitry is inoperative for an interval following an event. (N.W.R.)

• Research Organization: Western Reserve Univ., Cleveland
• Sponsoring Organization: USDOE
• NSA Number: NSA-15-026256
• OSTI ID: 4005727
• Journal Information: Nuclear Instr. & Methods, Journal Name: Nuclear Instr. & Methods Vol. Vol: 12
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACCIDENTS
COINCIDENCE METHODS
COUNTERS
EFFICIENCY
ELECTRONIC EQUIPMENT
ENGINEERING AND EQUIPMENT
PULSES
RESOLUTION