A device for detection of thermal neutrons, comprising a shell surrounding a core of plastic scintillator, gadolinium or cadmium, and metering device of the thermal neutrons associated

摘要

A device for detection of thermal neutrons, comprising a shell surrounding a core of plastic scintillator, gadolinium or cadmium, and metering device of the thermal neutrons associated. According to the invention, this detection device comprises a core (2), rich in gadolinium or cadmium, a shell in the scintillator of plastic (4) surrounding the core, and a conversion device of the photons (12), with an interface with the shell, and converting of the scintillation photons coming from the shell, in a signal representative of those - ci. The counting device comprises the detection device and a signal processing device (16) supplying a signal of the counting of thermal neutrons from the signal representing the scintillation photons. The present invention applies in particular to the detection of radiological material, to the nuclear radiation and the follow-up of the neutron nuclear criticality infrastructures.