Cold neutron imaging detection with a GSO scintillator

The pulse-height spectrum and two-dimensional image of a 0.5 mm thick GSO s cintillator were investigated for a 6 Angstrom cold neutron beam. The 31 an d 81 keV peaks resulting from neutron absorption by Gd nuclei were identifi ed in the pulse-height spectrum by using a photomultiplier tube. Images of 1.5 and 2.1 mm (FWHM) in diameter were observed for 1 and 2 mm diameter inc ident beams with an image intensifier and viewed by a CCD camera, correspon ding to a position resolution of 1.3 mm (FWHM). The result implies that a p osition resolution of better than 100 mu m would be achievable by employing a GSO scintillator thinner than 20 mu m. (C) 2000 Elsevier Science B.V. Al l rights reserved.