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Feasibility evaluation of a neutron grating interferometer with an analyzer grating based on a structured scintillator

Published

Author(s)

Daniel S. Hussey, Youngju Kim, Jongyul Kim, Seung W. Lee

Abstract

We introduce an analyzer grating based on a structured scintillator fabricated by a gadolinium oxysulfide powder filling method for a symmetric Talbot-Lau neutron grating interferometer. The analyzer grating, based on a structured scintillator, is an alternative way to analyze the Talbot self-image of a grating interferometer without using an absorption grating to block neutrons. Since the structured scintillator of the analyzer grating itself generates signal for neutron detection, we do not need an additional scintillator screen as with the analyzer grating based on an absorption grating. We have developed and tested an analyzer grating based on a structured scintillator in our symmetric Talbot-Lau neutron grating interferometer to produce high fidelity absorption, differential phase, and dark-field contrast images. The acquired images have been compared to results of a grating interferometer utilizing a typical analyzer grating based on an absorption grating with two commercial scintillation screens, gadolinium oxysulfide (Gd2O2S) and lithium fluoride mixed with zinc sulfide (LiF:ZnS). We report the performance of the analyzer grating based on a structured scintillator, and evaluate its feasibility for the neutron grating interferometer. The analyzer grating, based on structured scintillator, enhances visibility and shows a great potential of economical fabrication, compact system design and so on.
Citation
Review of Scientific Instruments

Keywords

Neutrons, Grating interferometer, Analyzer grating, Structured scintillator, Visibility

Citation

, D. , Kim, Y. , Kim, J. and Lee, S. (2021), Feasibility evaluation of a neutron grating interferometer with an analyzer grating based on a structured scintillator, Review of Scientific Instruments, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=925115 (Accessed June 16, 2024)

Issues

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Created April 21, 2021, Updated May 3, 2021