Epithermal Neutron Radiography and Tomography on Large and Strongly Scattering Samples

Epithermal Neutron Radiography and Tomography on Large and Strongly Scattering Samples

Burkhard Schillinger, Aaron Craft

Abstract. Standard neutron imaging is usually performed with a thermal or cold spectrum, but sometimes, penetration of thermal or cold neutrons is not sufficient for thick samples, so higher energies should be tried e.g. on technical machine parts or on rock samples containing crystal water. A 1-2 mm cadmium filter effectively absorbs all neutrons with ener¬gies lower than 0.4 eV, but is relatively transparent for higher energies, including epithermal neutrons. Radiography and computed tomography measurements were recorded at Idaho Nation Laboratory in the USA and Heinz Maier-Leibnitz Institut (MLZ) at the FRM II reactor in Germany. Image quality was improved by better penetration and by filtering out scattered and thermalized neutrons.

Keywords
Neutron Imaging, Neutron Computed Tomography, Cadmium Filter, Epithermal Neutrons, Penetration

Published online 1/5/2020, 7 pages
Copyright © 2020 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Burkhard Schillinger, Aaron Craft, Epithermal Neutron Radiography and Tomography on Large and Strongly Scattering Samples, Materials Research Proceedings, Vol. 15, pp 142-148, 2020

DOI: https://doi.org/10.21741/9781644900574-22

The article was published as article 22 of the book Neutron Radiography

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

References
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