ТЕХНІКА ТА МЕТОДИ ЕКСПЕРИМЕНТУ DELAYED NEUTRON YIELD MEASUREMENT ON THERMAL NEUTRON INDUCED FISSION OF 237 Np USING CROSS-CORRELATION TECHNIQUE (original) (raw)

Abstract

The measurement procedure based on the continuous thermal neutron beam modulation with a mechanical chopper was developed for delayed neutron yield measurement of the thermal neutron induced fission of 237 Np. The idea of the procedure is similar to that, widely used in modern computer communications for the non-authorized data access prevention. The data is modulated with predefined pattern before transmission to the public network and only recipient that has the modulation pattern is able to demodulate it upon reception. For the thermal neutron induced reaction applications the thermal neutron beam modulation pattern was used to demodulate the measured delayed neutron intensity signals on the detector output, resulting nonzero output only for the detector signals correlated with the beam modulation. The comparison of the method with the conventional measurement procedure was provided and it was demonstrated that the cross-correlation procedure has special features making it superi...

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