Neutron inverse optics in layered materials

Helmut Kaiser; K. Hamacher; R. Kulasekere; Wing T. Lee; J. F. Ankner; Brian DeFacio; Paul F. Miceli; David L. Worcester

doi:10.1117/12.179750

8 July 1994 Neutron inverse optics in layered materials

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

Proceedings Volume 2241, Inverse Optics III; (1994) https://doi.org/10.1117/12.179750
Event: SPIE's International Symposium on Optical Engineering and Photonics in Aerospace Sensing, 1994, Orlando, FL, United States

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.

Citation Download Citation

Helmut Kaiser, K. Hamacher, R. Kulasekere, Wing T. Lee, J. F. Ankner, Brian DeFacio, Paul F. Miceli, and David L. Worcester "Neutron inverse optics in layered materials", Proc. SPIE 2241, Inverse Optics III, (8 July 1994); https://doi.org/10.1117/12.179750

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