NEUTRON DETECTOR, WITH SCINTILLATING PLASTIC, SURROUNDING A GADOLINIUM OR CADMIUM CORE, AND SCINTILLATING COVER DOPED OR COVERED BY BORON OR LITHIUM, AND ASSOCIATED NEUTRON COUNTING DEVICE

摘要

The invention relates to a neutron detector, with scintillating plastic, surrounding a gadolinium or cadmium core, and a scintillating cover doped or covered by boron or lithium, and associated neutron counting device. The neutron detector comprises a core (2), which is rich in gadolinium or cadmium, a shell (10) made of a plastic scintillator, which surrounds the core, and a photon-conversion device (16) which has an interface with the shell and which converts the scintillation photons from the shell into a signal representing same. According to the invention, the detector also comprises a scintillator layer (12) containing boron or lithium, which surrounds the shell. The counting device comprises the detector and a device (20) for processing a neutron counting signal from a signal representing scintillation photons. The invention can be used, in particular, for dose rate measurements.