RF neutron spin flippers in time of flight Spin-Echo Resolved Grazing Incidence Scattering (SERGIS)

Neutrons scattered or reflected from a diffraction grating are subject to a periodic potential analogous to the potential experienced by electrons within a crystal. Hence, the wavefunction of the neutrons can be expanded in terms of Bloch waves and a dynamical theory can be applied to interpret the scattering phenomenon. In this paper, a dynamical theory is used to calculate the results of neutron spin-echo resolved grazing-incidence scattering (SERGIS) from a silicon diffraction grating with a rectangular profile. The calculations are compared with SERGIS measurements made on the same grating at two neutron sources: a pulsed source and a continuous wave source. In both cases, the spin-echo polarization, studied as a function of the spin-echo length, peaks at integer multiples of the grating period but there are some differences between the two sets of data. The dynamical theory explains the differences and gives a good account of both sets of results.

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Phospholipid membrane dynamics at the solid–liquid interface studied with grazing incidence neutron spin echo spectroscopy

Journal of Physics Conference Series ◽

10.1088/1742-6596/1316/1/012001 ◽

2019 ◽

Vol 1316 ◽

pp. 012001

Author(s):

Olaf Holderer ◽

Sebastian Jaksch ◽

Piotr Zolnierczuk ◽

Michael Ohl ◽

Henrich Frielinghaus

Keyword(s):

Spin Echo ◽

Grazing Incidence ◽

Membrane Dynamics ◽

Liquid Interface ◽

Neutron Spin ◽

Phospholipid Membrane ◽

Neutron Spin Echo ◽

Solid Liquid Interface ◽

Solid Liquid

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Using Neutron Spin Echo Resolved Grazing Incidence Scattering to Investigate Organic Solar Cell Materials

Journal of Visualized Experiments ◽

10.3791/51129 ◽

2014 ◽

Author(s):

Andrew J. Parnell ◽

Adam Hobson ◽

Robert M. Dalgliesh ◽

Richard A. L. Jones ◽

Alan D. F. Dunbar

Keyword(s):

Solar Cell ◽

Organic Solar Cell ◽

Spin Echo ◽

Grazing Incidence ◽

Neutron Spin ◽

Neutron Spin Echo

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Wide Angle Neutron Spin Echo and Time-of-Flight Spectrometer

Neutron Spin Echo Spectroscopy - Lecture Notes in Physics ◽

10.1007/3-540-45823-9_4 ◽

2002 ◽

pp. 35-47 ◽

Cited By ~ 1

Author(s):

C. Pappas ◽

A. Triolo ◽

F. Mezei ◽

R. Kischnik ◽

G. Kali

Keyword(s):

Spin Echo ◽

Time Of Flight ◽

Neutron Spin ◽

Wide Angle ◽

Neutron Spin Echo

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Grazing incidence neutron spin echo spectroscopy: instrumentation aspects and scientific opportunities

Journal of Physics Conference Series ◽

10.1088/1742-6596/528/1/012025 ◽

2014 ◽

Vol 528 ◽

pp. 012025 ◽

Cited By ~ 3

Author(s):

O Holderer ◽

H Frielinghaus ◽

S Wellert ◽

F Lipfert ◽

M Monkenbusch ◽

...

Keyword(s):

Spin Echo ◽

Grazing Incidence ◽

Neutron Spin ◽

Neutron Spin Echo ◽

Spectroscopy Instrumentation

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Influence of NaCl on the Structure and Dynamics of Phospholipid Layers

Frontiers in Physics ◽

10.3389/fphy.2021.628219 ◽

2021 ◽

Vol 9 ◽

Author(s):

Sebastian Jaksch ◽

Olaf Holderer ◽

Henrich Frielinghaus ◽

Alexandros Koutsioubas ◽

Piotr Zolnierczuk ◽

...

Keyword(s):

Spin Echo ◽

Dynamical Behavior ◽

Grazing Incidence ◽

Dynamical Analysis ◽

Neutron Spin ◽

Head Group ◽

Surface Mode ◽

Neutron Spin Echo ◽

Water Head ◽

Multilayer Stacks

We present a structural and dynamical analysis of the influence of NaCl on multilayer stacks of phospholipids on a solid surface. To this end, multilayer stacks of phospholipids (L-α-phosphatidylcholine, abbreviated as SoyPC) are investigated with neutron reflectometry, grazing-incidence small-angle neutron scattering (GISANS) and grazing-incidence neutron-spin echo spectroscopy (GINSES). We show both that the NaCl influence on the structure is predominantly on water-head group interface and also, that the change in dynamics is restricted to an associated change in the inter-plane viscosity. Using this knowledge, it is possible to model the dynamical behavior of a phospholipid membrane in response to a salt concentration of the solvent using only a single parameter, namely the in-plane viscosity. The excellent agreement with our previously published model also strongly supports the existence of a thermally excited surface mode in phospholipid membranes for close-to-physiological conditions.

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A grazing incidence neutron spin echo study of near surface dynamics in p(MEO2MA-co-OEGMA) copolymer brushes

Colloid & Polymer Science ◽

10.1007/s00396-018-4421-9 ◽

2018 ◽

Vol 296 (12) ◽

pp. 2005-2014 ◽

Cited By ~ 3

Author(s):

Stefan Wellert ◽

Jessica Hübner ◽

Dikran Boyaciyan ◽

Oxana Ivanova ◽

Regine von Klitzing ◽

...

Keyword(s):

Spin Echo ◽

Grazing Incidence ◽

Neutron Spin ◽

Surface Dynamics ◽

Near Surface ◽

Neutron Spin Echo ◽

Copolymer Brushes

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Measurements of Dynamic Contributions to Coherent Neutron Scattering

Colloids and Interfaces ◽

10.3390/colloids2030031 ◽

2018 ◽

Vol 2 (3) ◽

pp. 31

Author(s):

Sebastian Jaksch ◽

Alexandros Koutsioubas ◽

Stefan Mattauch ◽

Olaf Holderer ◽

Henrich Frielinghaus

Keyword(s):

Neutron Scattering ◽

Spin Echo ◽

Coherent Scattering ◽

Grazing Incidence ◽

Membrane Properties ◽

Neutron Spin ◽

Dynamic Mode ◽

Phospholipid Membranes ◽

Biologically Relevant ◽

Scattering Contribution

In this manuscript, we are investigating the contribution of dynamic membrane properties of phospholipid membranes to coherent scattering signals under grazing incidence. Spectroscopic measurements under grazing incidence can provide useful insight into the properties of biological membranes; however, they are often impeded by weak signals. By using grazing-incidence small-angle neutron scattering (GISANS) to identify a dynamic scattering contribution, we are able to independently corroborate the existence of a previously found dynamic mode, now measured by grazing-incidence neutron spin echo spectroscopy (GINSES). Additionally, by increasing the speed of measurement compared to GINSES from several days to hours, we were able to explore the temperature behavior of this mode in phospholipid membranes. These dynamic modes of the membranes show a wavelength of around 700 Å in-plane of the membrane and are most pronounced around 37 ∘C and strongly decrease at lower temperatures below 25 ∘C before vanishing at 20 ∘C. We therefore speculate that they may be linked to biologically relevant functions of the membranes themselves. To our knowledge, this is the first report of an investigation of that membrane mode by means of GISANS.

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Comparison of dynamical theory and phase-object approximation for neutron scattering from periodic structures

Journal of Applied Crystallography ◽

10.1107/s0021889811032730 ◽

2011 ◽

Vol 44 (5) ◽

pp. 958-965 ◽

Cited By ~ 3

Author(s):

Rana Ashkar ◽

V. O. de Haan ◽

A. A. van Well ◽

R. Dalgliesh ◽

J. Plomp ◽

...

Keyword(s):

Neutron Scattering ◽

Periodic Structures ◽

Good Description ◽

Spin Echo ◽

Diffraction Gratings ◽

Grazing Incidence ◽

Dynamical Theory ◽

Neutron Spin ◽

Phase Object ◽

Neutron Spin Echo

Dynamical theory (DT) calculations have been successfully developed to explain neutron spin-echo resolved grazing-incidence scattering from diffraction gratings. The theory, without any adjustable parameters, has been shown in previous publications to accurately reproduce the sensitivity of the spin-echo polarization signal to sample specifications and scattering geometry. The phase-object approximation (POA), which is computationally less demanding than the DT, has also been used to analyze neutron spin-echo polarization data obtained from diffraction gratings. In this paper, POA and DT calculations are compared for neutron scattering from various diffraction gratings in different geometrical settings. POA gives a good description of the data for transmission cases, where the neutron beam is incident at large angles to the average grating surface. However, for the grazing-incidence reflection cases that were studied, the POA does not fit the data using the independently determined dimensions of the measured gratings. On the other hand, the good agreement between dynamical theory and the data from gratings with known profiles paves the way for its use to extract profile information from periodic samples with unknown structures.

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