Energy broadening of neutron depth profiles by thin polyamide films

A protective covering is often required for neutron depth profiling (NDP) measurements of sensitive materials (e.g., Li-ion batteries). Addition of this layer can increase NDP profile energy broadening and depth assignment uncertainty. This study evaluates the magnitude of these effects when polyimi...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2022-12, Vol.331 (12), p.5013-5025
Main Authors: Weaver, Jamie L., Job, Anna, Manandhar, Kedar, Takeuchi, Ichiro, Downing, R. Gregory
Format: Article
Language:English
Subjects:
Batteries
Chemistry
Chemistry and Materials Science
Cold neutrons
Diagnostic Radiology
Film thickness
Hadrons
Heavy Ions
Inorganic Chemistry
Lithium-ion batteries
Neutron beams
Neutron depth profiling
Nuclear Chemistry
Nuclear Physics
Physical Chemistry
Polyamide resins
Polyamides
Rechargeable batteries
Thin films
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Summary:A protective covering is often required for neutron depth profiling (NDP) measurements of sensitive materials (e.g., Li-ion batteries). Addition of this layer can increase NDP profile energy broadening and depth assignment uncertainty. This study evaluates the magnitude of these effects when polyimide films of variable thicknesses are placed over Li-rich solids. Key results include a modeled increase in cold neutron beam attenuation with increased film thickness, a methodology for estimating profile energy broadening using a sigmoidal function, and, when using a thick layer, that the broadening will add uncertainity to the zero-depth position and depth scale assignment.
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-022-08517-5