Neutron inverse optics in layered materials

Helmut Kaiser, K. Hamacher, R. Kulasekere, W. T. Lee, J. F. Ankner, Brian DeFacio, P. Miceli, David L. Worcester

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

11 Scopus citations

Abstract

Neutron specular reflectivity data obtained with a new grazing angle neutron spectrometer (GANS) from a NiC/Ti-multilayer sample were analyzed and modeled for reconstructing the scattering length density profile as a periodic step potential for the layered material. There is some ambiguity in the results due to the uniqueness problem with missing phase information. For more complex layered materials, there is often insufficient knowledge about the layers to use modeling reconstruction without phase information. In the second part, we present a method in which this problem is solved for diffraction data from lipid multilayers: due to changes in chemistry (isomorphous heavy atom method) the phases are determined directly and therefore the density profile of the lipid bilayer can be uniquely determined.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsMichael A. Fiddy
PublisherPubl by Society of Photo-Optical Instrumentation Engineers
Pages78-89
Number of pages12
ISBN (Print)0819415456
StatePublished - 1994
Externally publishedYes
EventInverse Optics III - Orlando, FL, USA
Duration: Apr 4 1994Apr 5 1994

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume2241
ISSN (Print)0277-786X

Conference

ConferenceInverse Optics III
CityOrlando, FL, USA
Period04/4/9404/5/94

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