Neutron scattering lengths and cross sections

Sears, V. F.

doi:10.1080/10448639208218770

Cited by 3,351 publications

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References 5 publications

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“…In contrast to the X-ray scattering factors of oxygen and nitrogen which are nearly identical, the coherent neutron scattering lengths are 9.370 fm for 14 N and 5.803 fm for 16 O, respectively [38], which yields a ratio of f( 14 N)/f( 16 O)= 1.615. Thus, using neutrons it should be possible to detect any significant amount of nitrogen in the b-Ga 2 O 3 lattice on any oxygen site or on interstitial sites, either randomly distributed or preferentially located on a specific site.…”

Section: Neutron Diffraction Data and Refinementmentioning

confidence: 91%

On the ammonolysis of Ga2O3: An XRD, neutron diffraction and XAS investigation of the oxygen-rich part of the system Ga2O3–GaN

Roehrens

Brendt

Samuelis

et al. 2010

Journal of Solid State Chemistry

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GaN Ammonolysis Oxynitrides Nitrogen solubility a b s t r a c tWe investigated the ammonolysis of b-Ga 2 O 3 at elevated temperatures by means of ex situ X-ray diffraction, ex situ neutron diffraction and in situ X-ray absorption spectroscopy. Within the detection limits of these methods, we can rule out the existence of a crystalline or amorphous oxynitride phase that is not derived from wurtzite-type GaN. No evidence for a b-Ga 2 O 3 related oxynitride phase was found, and the nitrogen solubility in b-Ga 2 O 3 was found to be below the detection limit of about 2-3 at% in the anionic sublattice. These findings were obtained by monitoring the anionic occupancy factors and the lattice parameters of the b-Ga 2 O 3 phase obtained from total diffraction pattern refinement with the Rietveld method and by linear combination fitting of the X-ray absorption spectra that were recorded during the ammonolysis.

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Section: Neutron Diffraction Data and Refinementmentioning

confidence: 91%

On the ammonolysis of Ga2O3: An XRD, neutron diffraction and XAS investigation of the oxygen-rich part of the system Ga2O3–GaN

Roehrens

Brendt

Samuelis

et al. 2010

Journal of Solid State Chemistry

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“…For neutron diffraction, the scattered intensity is proportional to the weighted average of the coherent scattering length of the elements. In the present case, from the published values for Ti, V, Cr, Zr, and Ni scattering the average scattering length of the matrix and the intergranular phase are respectively -0.3389fm and 0.3479fm 9 . In absolute value, these two numbers are smaller than the scattering length of vanadium (-0.3824 fm).…”

Section: Neutron Diffractionmentioning

confidence: 99%

Ti-based BCC Alloy: Dehydrogenation Characterization Using Synchrotron and Neutron Diffraction

et al. 2016

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Dehydrogenation of a BCC alloy of composition 52Ti-12V-36Cr doped with 4 wt.% Zr 7 Ni 10 was studied by diffraction using synchrotron and neutron radiations. In the case of synchrotron radiation dehydrogenation was imposed by raising the temperature while keeping the sample under vacuum. We found that prior to final dehydrogenation the FCC dihydride phase is becoming metastable. Neutron in-situ experiment was done by keeping the deuterided sample at 200°C and slowly reducing the pressure. This lead to a reduction of the occupation factor of deuterium in the FCC phase and an increase of the isotropic atomic temperature factor of deuterium.

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“…As will be illustrated in one example below, partial deuteration is of not much use, and one typically tries to substitute at least 95% of all hydrogen sites with deuterium (more is better). There are a few other "taboo" isotopes besides hydrogen [36]. Among them are 10 B, natural Gd and natural Cd, due to their huge absorbtion cross sections for thermal neutrons.…”

Section: Methodsmentioning

confidence: 99%

Crystals for neutron scattering studies of quantum magnetism

Yankova

Hüvonen

Mühlbauer

et al. 2012

Philosophical Magazine

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We review a strategy for targeted synthesis of large single crystal samples of prototype quantum magnets for inelastic neutron scattering experiments. Four case studies of organic copper halogenide S = 1/2 systems are presented. They are meant to illustrate that exciting experimental results pertaining to forefront many-body quantum physics can be obtained on samples grown using very simple techniques, standard laboratory equipment, and almost no experience in in advanced crystal growth techniques.

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Neutron scattering lengths and cross sections

Cited by 3,351 publications

References 5 publications

On the ammonolysis of Ga2O3: An XRD, neutron diffraction and XAS investigation of the oxygen-rich part of the system Ga2O3–GaN

On the ammonolysis of Ga2O3: An XRD, neutron diffraction and XAS investigation of the oxygen-rich part of the system Ga2O3–GaN

Ti-based BCC Alloy: Dehydrogenation Characterization Using Synchrotron and Neutron Diffraction

Crystals for neutron scattering studies of quantum magnetism

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