Patent ID: 8729482

Claim:
A scintillation radiation detector capable of discriminating between neutron events and gamma-ray events, comprising: a scintillator; an optical filter; a first photodetector to which a first part of light emitted from the scintillator is introduced via the optical filter; and a second photodetector to which a second part of light emitted from the scintillator is introduced not via the optical filter, wherein, for a set of two wavelengths of A nm and (A+B) nm, the scintillator emits at least a light having the wavelength of A nm and a light having the wavelength of (A+B) nm when irradiated by gamma-ray, emits a light having the wavelength of A nm when irradiated by neutrons, and does not emit a light having the wavelength of (A+B) nm when irradiated by neutrons; and the optical filter blocks the light having the wavelength of A nm and transmits the light having the wavelength of (A+B) nm.