| 摘要 |
<p>A neutron spectrometer (2) is described. The neutron detector (2) comprises a conversion layer (4) provided on an outer surface of a spherical core (6) of neutron-moderating material. The conversion layer comprises a neutron absorbing material and a phosphor material. The spherical core is arranged to receive photons emitted from the phosphor material of the conversion layer. The neutron detector further comprises a photodetector (10) optically coupled to the spherical core and arranged to detect the photons emitted from the conversion layer. The conversion layer is provided with a diffusely reflective surface orientated toward the centre of the spherical core arranged to diffusely reflect the photons emitted from the conversion layer and wherein the spherical core is arranged to guide the photons to the photodetector.</p> |
