Investigation of multiple ultrasmall-angle neutron scattering with the aid of a double-crystal diffractometer

Abov, Yu. G.; Dzheparov, F. S.; Elyutin, N. O.; Lvov, D. V.; Tyulyusov, A. N.

doi:10.1134/s1063778814100020

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…However, it is known that peak broadening can be also caused by magnetic scattering, specifically multiple small-angle neutron scattering via magnetic interactions (Bacon, 1975;Gerold & Kostorz, 1978;Š aroun, 2007;Kreyssig et al, 2009;Elyutin et al, 2013). Magnetic scattering occurs when the magnetic moment of the neutrons interacts with the local magnetization in a sample, and the peak can be broadened owing to fluctuations in the magnetization of domains in ferromagnetic specimens (Hughes et al, 1949;Weiss, 1951;Kalanov et al, 1973;Shilstein & Somenkov, 1984;Kraan et al, 2007;Abov et al, 2014). In refraction scattering at domain boundaries, the neutron mean free path is the average path between two boundaries of a domain, or average domain size.…”

Section: Introductionmentioning

confidence: 99%

Influence of multiple small-angle neutron scattering on diffraction peak broadening in ferritic steel

Woo

Shin

et al. 2015

J Appl Cryst

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Peak broadening of neutron diffraction was studied at various neutron wavelengths (1.24–2.61 Å). As the neutron beam path through a specimen increased, significant peak broadening was observed in ferritic steel, but not in austenitic steel. The peak broadening was reduced under a magnetic field applied perpendicular to the beam direction. Small‐angle neutron scattering results showed significant reduction in scattering intensities under a magnetic field of 1.2 T. It is suggested that the peak broadening can be attributed to multiple small‐angle neutron scattering by magnetic domains. Thus, a sufficiently strong magnetic field could enhance the deep penetration capability of neutron diffraction by reducing the peak broadening.

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Section: Introductionmentioning

confidence: 99%

Influence of multiple small-angle neutron scattering on diffraction peak broadening in ferritic steel

Woo

Shin

et al. 2015

J Appl Cryst

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Investigation of condensed matter by means of elastic thermal-neutron scattering

et al. 2016

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Neutron physics investigations of fundamental processes of statistical mechanics

Dzheparov

Gul'ko

Elyutin

et al. 2022

Int. J. Mod. Phys. A

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Studies in spin dynamics of disordered media and multiple ultra-small angle neutron scattering are considered. The experiments were carried out on unique installations designed in ITEP laboratory of neutron physics: beta-NMR spectrometer and universal neutron diffractometer. The main attention is paid to random walks in disordered systems and ultra-small angle neutron scattering (USANS) on objects with space correlations in positions of scatterers. Synthesis of concentration expansion, semi-phenomenological theory and numerical simulations produced satisfactory description of the nuclear polarization transfer within disordered 8Li–6Li spin subsystem in LiF single crystal. The theory of USANS starts from eikonal approximation for the scattering amplitude, which (a) reproduces the phenomenological Moliere–Bethe theory for the observable neutron angular distributions for uncorrelated random positions of scatterers, and (b) gives a possibility to take into account their spatial correlations.

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Investigation of multiple ultrasmall-angle neutron scattering with the aid of a double-crystal diffractometer

Cited by 3 publications

References 19 publications

Influence of multiple small-angle neutron scattering on diffraction peak broadening in ferritic steel

Influence of multiple small-angle neutron scattering on diffraction peak broadening in ferritic steel

Investigation of condensed matter by means of elastic thermal-neutron scattering

Neutron physics investigations of fundamental processes of statistical mechanics

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