Results 251 to 260 of about 44,705 (305)

Neutron Diffraction by Crystals

Nature, 1949
IN considering the new technique of neutron diffraction by crystals it is necessary to discuss: (1) the properties of neutrons ; (2) their sources, methods of observation and measurement ; (3) their interaction with matter (4) experimental methods ; (5) results of experiments.
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Neutron Diffraction

1986
Abstract Neutrons are a principal tool for the study of lattice vibrational spectra in materials. This article provides a detailed account of fission and spallation methods of neutron production that are capable of producing sufficient intensity to be useful in neutron scattering research.
W.B. Yelon, F.K. Ross, A.D. Krawitz
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Grazing-angle neutron diffraction

Physical Review B, 1989
We 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.
, Ankner, , Zabel, , Neumann, , Majkrzak
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Neutron diffraction study of carbonmonoxymyoglobin

Journal of Molecular Biology, 1991
Neutron diffraction data from a crystal of carbonmonoxymyoglobin were refined by PROLSQ, a modern restrained least-squares procedure in reciprocal space, in conjunction with a solvent analysis technique, to a final R-factor of 11.3%. The ligand CO occupies two sites and its binding conformations are distorted from the linear conformation. The N epsilon
X D, Cheng, B P, Schoenborn
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Diffraction in neutron imaging—A review

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2018
Abstract Neutron imaging is a highly successful experimental technique ever since adequate neutron sources were available. In general, neutron imaging is performed with a wide wavelength spectrum for best flux conditions in transmission geometry. Neutrons provide outstanding features in the penetration of many structural materials, which often makes ...
Woracek, Robin, Santisteban, Javier, Fedrigo, Anna, Strobl, Markus   +3 more
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Need for Neutron Diffraction Instruments

Science, 1999
The 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,
P, Langan, B P, Schoenborn
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Neutron Diffraction by a Piezoelectric Resonator

Nature, 1971
IT 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.
R W, Englehart, A M, Jacobs
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SWCN characterization by neutron diffraction

Physica B: Condensed Matter, 2004
Single-wall carbon nanotube structure has been investigated by neutron diffraction using the SANDALS time of flight diffractometer (at R.A.L.). The Q range of the detector allows for the determination of single the tube diameter, diameter distribution, and mean number of tubes in the bundle. Results are compared to theoretical predictions.
A Giannasi ab, M Celli, JL Sauvajol, M Zoppi, DT Bowron   +4 more
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Neutron diffraction of interphase nuclei

Journal of Molecular Biology, 1982
Abstract The neutron small-angle diffraction patterns obtained with native interphase nuclei are quite featureless and difficult to interpret. However, the difference between two patterns which have been obtained before and after having induced a change in the packing of the more stable structural entities, e.g.
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Neutron Diffraction Analysis of Myoglobin

Nature, 1969
A preliminary analysis of myoglobin proves that neutron diffraction analysis of proteins is feasible and should reveal the position of fixed hydrogen atoms.
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