scholarly journals X-ray Scattering and O–O Pair-Distribution Functions of Amorphous Ices

2018 ◽  
Vol 122 (30) ◽  
pp. 7616-7624 ◽  
Author(s):  
Daniel Mariedahl ◽  
Fivos Perakis ◽  
Alexander Späh ◽  
Harshad Pathak ◽  
Kyung Hwan Kim ◽  
...  
Keyword(s):  
Distribution Functions ◽  
X Ray ◽  
X Ray Scattering ◽  
Amorphous Ices ◽  
Pair Distribution Functions ◽  
Ray Scattering

Combination of EXAFS and Differential Anomalous X-ray Scattering for Studying Ni 2 Zr Amorphous Alloy

1992 ◽  
Vol 47 (12) ◽  
pp. 1191-1196 ◽  
Author(s):  
Yu. A. Babanov ◽  
A. F. Sidorenko ◽  
V. R. Shvetsov ◽  
M. Bionducci ◽  
G. Licheri ◽  
...  
Keyword(s):  
Amorphous Alloy ◽  
Mechanical Alloying ◽  
Distribution Functions ◽  
Anomalous Scattering ◽  
X Ray ◽  
Amorphous Sample ◽  
X Ray Scattering ◽  
Partial Distribution ◽  
Pair Distribution Functions ◽  
Ray Scattering

Abstract In this paper we report a first application of the new idea of combining EXAFS and differential anomalous scattering techniques to obtain partial distribution functions for a binary amorphous sample. This method has been successfully employed in extracting Ni-Ni and Ni-Zr pair distribution functions for Ni2Zr prepared by mechanical alloying. A comparison with results from previous studies is also reported.

Structural Study of a Decagonal Al75Fe15Ni10 Alloy by Anomalous X-ray Scattering (AXS) Method

1991 ◽  
Vol 46 (7) ◽  
pp. 605-608 ◽  
Author(s):  
E. Matsubara ◽  
Y. Waseda ◽  
A. P. Tsai ◽  
A. Inoue ◽  
T. Masumoto
Keyword(s):  
Structural Study ◽  
Radial Distribution ◽  
Distribution Functions ◽  
Radial Distribution Functions ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

A structural study of an as-quenched decagonal Al75Fe15Ni10 alloy has been carried out by anomalous x-ray scattering (AXS) as well as ordinary x-ray diffraction. The environmental radial distribution functions (RDFs) for Fe and Ni determined by the AXS measurements turned out to resemble each other and to be similar to the ordinary RDF obtained by ordinary x-ray diffraction. These results clearly show that the Ni and Fe atoms are homogeneously distributed and occupy the same sites in the decagonal structure of Al75Fe15Ni10.

What can x-ray scattering tell us about the radial distribution functions of water?

2000 ◽  
Vol 113 (20) ◽  
pp. 9149-9161 ◽  
Author(s):  
Jon M. Sorenson ◽  
Greg Hura ◽  
Robert M. Glaeser ◽  
Teresa Head-Gordon
Keyword(s):  
Radial Distribution ◽  
Distribution Functions ◽  
Radial Distribution Functions ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals Phase densities and lamellar morphologies of semicrystalline polyethylenesviaabsolute small-angle X-ray scattering measurements

2015 ◽  
Vol 48 (5) ◽  
pp. 1498-1506 ◽  
Author(s):  
Monika Basiura-Cembala ◽  
Kurt Erlacher ◽  
Jan Skov Pedersen ◽  
Bart Goderis
Keyword(s):  
Amorphous Phase ◽  
Small Angle ◽  
Volume Fraction ◽  
Distribution Functions ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Ray Scattering ◽  
Model Independent ◽  
The Absolute ◽  
Ray Scattering

With the crystalline volume fraction from small-angle X-ray scattering (SAXS) and the density of the crystalline phase from wide-angle X-ray diffraction, the amorphous phase density of two representative polyethylenes was calculated as a function of temperature using the absolute total SAXS scattering power or invariant. The density of the amorphous phase in semicrystalline polyethylene is crystallinity independent and is lower than melt-extrapolated values reported in the literature. Model-independent SAXS-based crystallinity values can be calculated with the aid of the densities of the crystalline and amorphous phase and the absolute SAXS invariant. Such model-independent crystallinity values can be used in SAXS curve-shape analysis procedures to obtain the average thickness of the crystalline and amorphous layers also in the case of non-ideal lamellar semicrystalline polymer morphologies for which the number-average long period cannot be retrieved from the maxima in correlation functions or interface distribution functions.

scholarly journals Structural Analysis of Melt-Spun Polymer-Optical Poly(Methyl Methacrylate) Fibres by Small-Angle X-ray Scattering and Monte-Carlo Simulation

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 779
Author(s):  
Jan Kallweit ◽  
Thomas Vad ◽  
Felix Krooß ◽  
Thomas Gries ◽  
Mohmmed Houri ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Structural Properties ◽  
Small Angle ◽  
Processing Parameters ◽  
Distribution Functions ◽  
Saxs Data ◽  
X Ray ◽  
X Ray Scattering ◽  
Melt Spun ◽  
Ray Scattering

The structural properties, mainly the spatial variation of density and chain interaction, of melt-spun polymer optical fibres (POFs) are investigated by small-angle X-ray scattering (SAXS) and compared to Monte-Carlo polymer simulations. The amorphous PMMA POFs had been subjected to a rapid cooling in a water quench right after extrusion in order to obtain a radial refractive-index profile. Four fibre samples with different processing parameters are investigated and the SAXS data analysed via Guinier approach. Distance-distribution functions from the respective equatorial and meridional SAXS data are computed to extract the fibres’ nanostructures in the equatorial plane and along the fibre axis, respectively. Temperature profiles of the cooling process are simulated for different locations within the fibre and taken as input for Monte-Carlo simulations of the polymer structure. The simulation results agree with the SAXS measurements in terms of the cooling profile’s strong influence on the structural properties of the fibre: slower cooling in the centre of the fibre leads to stronger interchain interaction, but also results in a higher density and more homogenous materials with less optical scattering.

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