0105605 - UJF-V 20043164 RIV NL eng J - Journal Article
Jakubek, J. - Pospíšil, S. - Uher, J. - Vacík, Jiří - Vavřík, D.
Properties of the single neutron pixel detector based on the Medipix-1 device.
[Vlastnosti jednopixelového neutronového detektoru založeného na detektoru Medipix-1.]
Nuclear Instruments & Methods in Physics Research Section A. Roč. 531, 1/2 (2004), s. 276-284. ISSN 0168-9002. E-ISSN 1872-9576
R&D Projects: GA ČR GA202/03/0891
Institutional research plan: CEZ:AV0Z1048901
Keywords : neutron detection * pixel detectors * slow neutron
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 1.349, year: 2004

Neutron transmission radiography (neutronography) is based on the attenuation of radiation passing through matter. Thanks to different values of neutron and X-ray attenuation coefficients in matter, neutronography can image material properties which cannot be obtained by roentgenography (e.g. materials containing light elements such as Hydrogen in plastic or biological samples). The reliable performance of the neutron detecting device is essential for the acquisition of high-quality neutronograms. A single neutron pixel detector based on a single X-ray photon pixel Medipix-1 detector device is presented. Slow neutrons are converted in a converter layer into heavy charged particles which are subsequently detected by the Medipix-1 device. Detection efficiency, spatial resolution and other detector properties are determined for different converter materials ((LiF)-Li-6, B-10) and compared with results of Monte-Carlo simulations. Several neutronograrns of real objects demonstrating the capabilities and possible applications of the technique are presented.

V článku je navržen jedno-pixelový neutronový detektor založený na kombinaci detektoru Medipix-1 (pro detekci Roetgenového záření) a tenkého konvertoru neutronů (LiF nebo B) pro konverzi na těžké nabité částice. Detekční efektivita systému byla stanovena pro různé tloušťky konvertoru a experimentální hodnoty byly porovnány s výsledky simulací Monte-Carlo. Několik neutronogramů reálných objektů demonstruje schopnosti a možné aplikace navržené detekční metody.
Permanent Link: http://hdl.handle.net/11104/0012841