Measurement of the Prompt Neutron Decay Constant of the NORA Reactor by the Interval Distribution Technique

The prompt neutron decay constant of the NORA reactor for a number of subcritical states has been determined by means of count-interval distribution measurements. The theoretical model agrees well with the experimental results. The technique has been compared with the Feynman and Mogilner methods. With the count-interval distribution technique, a better accuracy of the results has been achieved in a shorter time of measurement, as expected from the theory.