Performance of Slow Neutron Pixel Detector
NIM A Vol. 542, pages 283-287
Semiconductor pixel radiation detector systems have recently made significant progress achieving excellent spatial
resolution, high sensitivity, wide dynamic range and low noise. The hybrid silicon pixel device ofMedipix type
developed at CERN was originally designed for position sensitive single X-ray photon detection. We have adapted this
device to a position sensitive detector ofslow neutrons by covering the detector surface with a 6LiF neutron converter.
Neutrons are converted to tritons and alpha particles which are subsequently detected by the silicon pixel detector. The
basic parameters ofsuch a pixel neutron sensitive device were investigated using thermal neutron beams. Tests for
neutron imaging applications and comparison with currently used devices for neutron radiography (CCD camera with
scintillator, imaging plates) were performed. The aim of this article is to demonstrate the exceptional good spatial
resolution for neutrons (up to 8.5 lp/mm in the case of Medipix-2 option), reasonable neutron detection efficiency with
very low sensitivity to background gamma radiation, low noise, perfect linearity and wide dynamic range. Results and
future prospects are presented in this article.
Cite article as:
J. Vacík, "Performance of Slow Neutron Pixel Detector", NIM A Vol. 542, pages 283-287 (2005)