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J. Imaging 2017, 3(4), 60; doi:10.3390/jimaging3040060

Performance of the Commercial PP/ZnS:Cu and PP/ZnS:Ag Scintillation Screens for Fast Neutron Imaging

Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Lichtenbergstr. 1, 85748 Garching, Germany
Bavarian Research Institute of Experimental Geochemistry and Geophysics (BGI), University of Bayreuth, 95440 Bayreuth, Germany
RC Tritec AG/LumiNova AG, Speicherstrasse 60 a, CH-9053 Teufen, Switzerland
Laboratory for Neutron Scattering and Imaging (LNS), Paul Scherrer Institut, WBBA 108, CH-5232 Villigen, Switzerland
ZTWB Radiochemie München, Technische Universität München, Lichtenbergstr. Walther-Meißner-Str. 3, 85748 Garching, Germany
Author to whom correspondence should be addressed.
Received: 31 October 2017 / Revised: 1 December 2017 / Accepted: 7 December 2017 / Published: 10 December 2017
(This article belongs to the Special Issue Neutron Imaging)
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Fast neutron imaging has a great potential as a nondestructive technique for testing large objects. The main factor limiting applications of this technique is detection technology, offering relatively poor spatial resolution of images and low detection efficiency, which results in very long exposure times. Therefore, research on development of scintillators for fast neutron imaging is of high importance. A comparison of the light output, gamma radiation sensitivity and spatial resolution of commercially available scintillator screens composed of PP/ZnS:Cu and PP/ZnS:Ag of different thicknesses are presented. The scintillators were provided by RC Tritec AG company and the test performed at the NECTAR facility located at the FRM II nuclear research reactor. It was shown that light output increases and the spatial resolution decreases with the scintillator thickness. Both compositions of the scintillating material provide similar light output, while the gamma sensitivity of PP/ZnS:Cu is significantly higher as compared to PP/ZnS:Ag-based scintillators. Moreover, we report which factors should be considered when choosing a scintillator and what are the limitations of the investigated types of scintillators. View Full-Text
Keywords: fast neutron imaging; neutron scintillator screens; neutron imaging detectors, ZnS phosphors fast neutron imaging; neutron scintillator screens; neutron imaging detectors, ZnS phosphors

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Makowska, M.G.; Walfort, B.; Zeller, A.; Grünzweig, C.; Bücherl, T. Performance of the Commercial PP/ZnS:Cu and PP/ZnS:Ag Scintillation Screens for Fast Neutron Imaging. J. Imaging 2017, 3, 60.

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