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Rate of n-fold Accidental Coincidences


THE rate of accidental coincidences between two Geiger counters is given by R2 = 2.N1.N2.t, where N1, N2 are the rates of the two single counters and t is the resolving time of the recorder. This formula is sometimes generalized for n-fold coincidences as Rn = N1.N2...Nn.(2t)n-1. This formula is, however, incorrect and it should be replaced by Rn = + terms in tn. .(1)

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JÁNOSSY, L. Rate of n-fold Accidental Coincidences. Nature 153, 165 (1944).

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