Results 21 to 30 of about 50 (50)
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Grazing-angle neutron diffraction
Physical Review B, 1989We report the first grazing-angle neutron-diffraction experiment. Byrelaxing all collimations except that of the incident beam, we have obtainedadequate intensity to observe simultaneously the specularly reflected and(1/bar 1/1) grazing-angle diffracted beams from the (110) surface of alarge perfect silicon crystal.
Charles F. Majkrzak +3 more
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Neutron diffraction by Li2MgPb
Journal of Physics and Chemistry of Solids, 1963In order to determine which of the three possible atomic arrangements for face-centered cubic Li/sub 2/MgPb is most probable, neutron diffraction studies were conducted on powdered samples of Li/sub 2/MgPb. The observed intensities were in agreement with these calculated for Type 2: Pb at (0,0,0), Li at (1/2,1/2,1/2), and Li and Mg at (1/4,1/4,1/4)(3/4,
Donald E. Sands +2 more
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Neutron diffraction on actinides
Journal of the Less Common Metals, 1986The evperimental methods of elastic neutron scattering are briefly reviewed and their impact on the physics of the actinides is illustrated by typical evamples such as investigations of magnetic ordering in actinide monopnictides (incommensurate and multi-K structures), study of vuadrupolar ordering in UO2, form factor determination in USb and PuSb and
J Rossat-Mignod +5 more
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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1988
Abstract An Anger Camera PSD is due for installation soon on the Single Crystal Diffractometer (SXD) at the Spallation Neutron Source, ISIS. The camera has an active area of 300 × 300 mm, divided into 128 × 128 pixels, giving a resolution of 2–3 mm on the detector surface.
R.T. Lawrence, C.C. Wilson, J.B. Forsyth
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Abstract An Anger Camera PSD is due for installation soon on the Single Crystal Diffractometer (SXD) at the Spallation Neutron Source, ISIS. The camera has an active area of 300 × 300 mm, divided into 128 × 128 pixels, giving a resolution of 2–3 mm on the detector surface.
R.T. Lawrence, C.C. Wilson, J.B. Forsyth
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Need for Neutron Diffraction Instruments
Science, 1999The News Focus article by Robert F. Service “Wiggling and undulating out of an x-ray shortage” (27 Aug., p. [1342][1]) highlights the shortage of hard x-ray sources that has occurred after an explosion in demand from structural biologists. A greater shortage for U.S. structural biologists,
Paul Langan, Benno P. Schoenborn
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Journal of Magnetism and Magnetic Materials, 2004
Abstract The neutron diffraction on HoB12 samples reveals to antiferromagnetic order with wave-vector q =( 2 3 1 3 1 3 ) and (0 2 3 2 3 ) . Within statistics no further peaks were detected at low angles and the magnetic ordering is commensurate with a threefold cell size.
Konrad Siemensmeyer +5 more
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Abstract The neutron diffraction on HoB12 samples reveals to antiferromagnetic order with wave-vector q =( 2 3 1 3 1 3 ) and (0 2 3 2 3 ) . Within statistics no further peaks were detected at low angles and the magnetic ordering is commensurate with a threefold cell size.
Konrad Siemensmeyer +5 more
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MRS Bulletin, 1990
For many classes of materials, neutron diffraction is the best way to obtain detailed atomic-level structural information. Diffraction experiments on single crystals provide the most precise data, but sufficiently large specimens (>0.1–0.5 mm3) are often not available.
John M. Newsam, James D. Jorgensen
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For many classes of materials, neutron diffraction is the best way to obtain detailed atomic-level structural information. Diffraction experiments on single crystals provide the most precise data, but sufficiently large specimens (>0.1–0.5 mm3) are often not available.
John M. Newsam, James D. Jorgensen
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Neutron diffraction studies of and
Journal of Physics: Condensed Matter, 1999The structural and magnetic properties of the compounds and their nitrides have been studied by means of neutron diffraction and crystal-field calculation. Neutron diffraction studies show that the compounds and their nitrides exhibit -type structure, The vanadium atoms occupy 8i sites, and the nitrogen atoms occupy the 2b sites.
Yingchang Yang +7 more
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Extinction in neutron diffraction
Acta Crystallographica Section A, 1976This article re-analyses the extinction problem in diffraction. It has been proved that Hamilton's equations are valid only for mosaic crystals, type I. The solution of these equations has been found for any shape of crystal using general initial conditions.
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Neutron Diffraction by a Piezoelectric Resonator
Nature, 1971IT has been reported in neutron diffraction measurements that the neutron detector signal is enhanced and can be modulated when the diffraction crystal is piezoelectrically vibrated at a resonance frequency1–9. The time averaged enhancement is an increasing function of vibration amplitude and the modulation is at twice the resonator frequency.
Richard W. Englehart, Alan M. Jacobs
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