Results 321 to 330 of about 193,469 (357)
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Small Angle Scattering of Thermal Neutrons
Physical Review, 1950Experiments on the small angle scattering of thermal neutrons by powders are compared with theory. The available theories, which closely resemble those for small angle scattering of x-rays, are found to give a satisfactory account of the results. In general, the neutrons are scattered into a Gaussian distribution in angle whose width is directly ...
D. Meneghetti +3 more
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Small angle neutron scattering in a superparamagnet
Journal of Magnetism and Magnetic Materials, 1992Abstract Small angle neutron scattering (SANS) measurements and neutron depolarisation have been performed in superparamagnetic Fe particles. The particles size and interparticle distance are close to the values obtained from electron microscopy and magnetization.
C. Djega-Mariadassou +5 more
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Small angle neutron scattering in Ni3Al
Journal of Applied Physics, 1982The temperature dependence of small angle neutron scattering in weakly ferromagnetic Ni3Al has been investigated by means of multi-detector small-angle spectrometers at A.E.R.E. Harwell and I.L.L. Grenoble. Measurements are reported in three stoichiometric samples with residual resistivity ratios [RRR=ρ(293 K)/ρ(4.2 K)] of up to 40 and in a Ni rich ...
N. R. Bernhoeft +3 more
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Multiple Small-Angle Neutron Scattering
Journal of Neutron Research, 1999Over the past decade, a multiple small-angle neutron scattering (MSANS) formalism has been developed to enable researchers to derive microstructural parameters from multiply-scattered small-angle neutron data. The MSANS formalism is particularly useful in ceramic science and materials research because it is applicable to samples that are thicker (>
Susan Krueger +2 more
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Small-angle neutron scattering
2000Abstract Small-angle scattering (SAS) of X-rays or neutrons arises from scattering density fluctuations of the order 10—100 A. In biological studies, samples are usually solutions of macromolecules in this size range. Depending on the experimental conditions such as macromolecular concentration, for example, SAS provides information on ...
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Small angle scattering of fast neutrons
Nuclear Instruments and Methods, 1971Abstract The reasons for interest in small angle scattering of fast neutrons are outlined. Apparatus developed for investigating small angle scattering of 3.5 MeV neutrons emitted in the 2H(d,n)3He reaction using a 1 MeV accelerator is described and its performance assessed.
K.Masood Ali +2 more
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Small Angle Neutron Scattering on Polymers
Journal of Neutron Research, 1999Many polymer molecules can be isotopically labelled by substituting deuterium for hydrogen on the polymer chain. The labelling method minimally perturbs the thermodynamics of polymeric systems while providing superb contrast for neutron experiments. In this article, some of the uses of small angle neutron scattering and neutron reflectivity for the ...
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Small-angle neutron scattering and neutron reflectometry
1993Diffraction methods, interpreted loosely, could be applied to the techniques of wide-angle X-ray scattering, small-angle X-ray scattering, electron diffraction, small-angle neutron scattering, small-angle light scattering and reflectometry. Each of the above techniques is defined by the size range explored and the property that causes the scattering ...
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Phase-sensitive small-angle neutron scattering
Journal of Applied Crystallography, 2014A method is described for determining the neutron scattering length density distribution of a molecular-scale object directly from phase-sensitive small-angle neutron scattering (SANS). The structure factor amplitude is obtained through the use of a reference structure for a collection of randomly oriented, identical objects in the dilute solution ...
Brian B. Maranville +6 more
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Quokka: The Small-Angle Neutron Scattering Instrument
Neutron News, 2009In April 2009, we commenced commissioning experiments on Quokka – the 40 m total flight-path pinhole small-angle neutron scattering (SANS) instrument at the Australian research reactor, OPAL (Figure 1) [1,2].
William A. Hamilton +2 more
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