Academic literature on the topic 'Neutron diffraction'

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Journal articles on the topic "Neutron diffraction"

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Artioli, Gilberto. "Single-crystal neutron diffraction." European Journal of Mineralogy 14, no. 2 (March 22, 2002): 233–39. http://dx.doi.org/10.1127/0935-1221/2002/0014-0233.

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Jorgensen, James D., and John M. Newsam. "Neutron Powder Diffraction." MRS Bulletin 15, no. 11 (November 1990): 49–55. http://dx.doi.org/10.1557/s088376940005836x.

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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. Steady development of instrumentation and data analysis techniques, however, has now made it possible to obtain comparably precise structural information from neutron diffraction experiments on powder samples. Such studies have played a prominent role in solid state physics, chemistry, and materials science in recent years. The special capabilities that have contributed to the success of this technique include atomic cross sections that are often favorable for a particular structural problem, high neutron penetrating power, the excellent resolution achieved with state-of-the-art diffractometers, and steadily advancing analysis techniques that facilitate obtaining structural information from a diverse range of polycrystalline materials.As Axe, Pynn, and Hayter note in their introductory article in this issue of the MRS BULLETIN, atomic scattering cross sections for neutrons are not simply a function of atomic number, as is the case for x-rays. The scattering is predominantly from the nuclei (thus avoiding the form factor diminution observed for x-ray scattering), and coherent neutron scattering cross sections can, generally, be as large for light atoms as for heavy atoms. Light atoms, such as hydrogen (deuterium), oxygen, nitrogen, carbon, or lithium, can therefore be located in the presence of heavier atoms. This advantage has led to the widespread use of neutron powder diffraction for studing metal hydrides and, more recently, oxide superconductors.
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MEKATA, Mamoru. "Neutron Diffraction." RADIOISOTOPES 44, no. 4 (1995): 256–66. http://dx.doi.org/10.3769/radioisotopes.44.256.

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WU, XIANG-YAO, BAI-JUN ZHANG, XIAO-JING LIU, BING LIU, CHUN-LI ZHANG, and JING-WU LI. "QUANTUM THEORY OF NEUTRON DIFFRACTION." International Journal of Modern Physics B 23, no. 15 (June 20, 2009): 3255–64. http://dx.doi.org/10.1142/s0217979209052601.

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Phenomena of electron, neutron, atomic, and molecular diffraction have been studied in many experiments, and these experiments have been explained by some theoretical works. We study neutron single and double-slit diffraction with a new quantum mechanical approach. The calculation results are compared with the experimental data obtained with cold neutrons.
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Delapalme, A. "Use of Extinction Corrections in Neutron Diffraction Experiments." Australian Journal of Physics 41, no. 3 (1988): 383. http://dx.doi.org/10.1071/ph880383.

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The study of extinction by neutrons reveals many features of the extinction problem: theory and practical cases, polarised and unpolarised neutron cases. Special attention is given to the usual extinction corrections for neutron diffraction experiments, showing the relative importance of structure factor, wavelength, Lorentz factor, mosaic and the path of neutrons through the crystal. Two problems are reviewed: (a) how to detect the presence of extinction in both cases of a single crystal experiment with polarised and unpolarised neutrons; and (b) after experimental evidence for extinction in a neutron diffraction experiment, how to follow a reliable way to correct the neutron diffraction data in both cases of polarised and unpolarised neutron experiments. Some examples are given.
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Brokmeier, H. G. "Neutron Diffraction Texture Analysis of Multi-Phase Systems." Textures and Microstructures 10, no. 4 (January 1, 1989): 325–46. http://dx.doi.org/10.1155/tsm.10.325.

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Neutron diffraction methods for texture analysis are closely parallel to well-known X-ray diffraction techniques. The chief advantage of neutron diffraction over X-ray diffraction, however, arises from the fact that the interaction of neutrons with matter is relatively weak, and consequently the penetration depth of neutrons is 102–103 times larger than that of X-rays. Hence neutron diffraction is an efficient tool for measuring textures in multi-phase systems. Based on the high transmission of a neutron beam the effect of anisotropic absorption in multi-phase materials can be neglected in most cases. Moreover, the analysis of bulk textures becomes possible, such that textures in a wide variety of multi-phase systems can be studied which are of special interest in engineering and science (metals, alloys, composites, ceramics and geological specimens).
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Guthrie, Malcolm, Reinhard Boehler, Jamie Molaison, Karunakar Kothapalli, Antonio dos Santos, and Christopher Tulk. "Neutron diffraction in diamond anvil cells." Acta Crystallographica Section A Foundations and Advances 70, a1 (August 5, 2014): C895. http://dx.doi.org/10.1107/s2053273314091049.

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Neutron diffraction provides many unique advantages for structural studies of materials under extremes of pressure. In addition to the famous sensitivity to light atom positions, neutrons are sensitive to long-range magnetic order and have an extremely high spatial resolution. However, a major downside of neutron techniques, that is keenly felt in high pressure studies, is the comparative weakness of available sources. Some of these limitations have been recently overcome at the Spallation Neutron Source, ORNL, using a newly developed supported diamond-anvil device. For the first time, this new capability allows the possibility of conducting neutron diffraction measurements at pressures approaching 100 GPa. These new developments will be discussed with a look towards the prospects for advances in neutron scattering at high pressure in the near future.
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KAMIYAMA, Takashi. "Neutron Powder Diffraction." Nihon Kessho Gakkaishi 46, no. 4 (2004): 259–67. http://dx.doi.org/10.5940/jcrsj.46.259.

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Ressouche, E. "Polarized neutron diffraction." École thématique de la Société Française de la Neutronique 13 (2014): 02002. http://dx.doi.org/10.1051/sfn/20141302002.

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Freund, Andreas K., Hao Qu, Xiang Liu, Mike Crosby, and Changyong Chen. "Optimization of highly oriented pyrolytic graphite applied to neutron crystal optics." Journal of Applied Crystallography 55, no. 2 (February 16, 2022): 247–57. http://dx.doi.org/10.1107/s1600576722000127.

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The neutron diffraction properties of highly oriented pyrolytic graphite (HOPG) are reviewed using experimental results that have been obtained by diffraction of high-energy gamma rays, X-rays and neutrons. The interpretation of the empirical data based on diffraction theory leads to generic diagrams that display the performance of HOPG as a function of crystal thickness, mosaic spread and neutron wavelength. The analysis of the relation between the defect structure and diffraction properties demonstrates the usefulness of a detailed X-ray diffraction study to maximize the efficiency of composite neutron monochromators and analyzers. The optimization procedure is illustrated by the configuration of a double-focusing monochromator.
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Dissertations / Theses on the topic "Neutron diffraction"

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Wang, Duan Qiang. "Strain measurement using neutron diffraction." Thesis, Open University, 1996. http://oro.open.ac.uk/57651/.

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This thesis contains a study of improvement and application of strain measurement technique using neutron diffraction. A dedicated neutron strain scanner - ENGIN, funded by Ee. has been developed at ISIS. It has two radial collimators, allowing for the first time, measurements taken simultaneously at two orthogonal directions; uses Pawley refinement permitting both whole pattern and individual peak profile analysis and its positioner allow's specimens weighing 250 kg to be placed with an accuracy of 100 um. Strain measurement using neutron diffraction has been investigated under two extreme circumstances: very shallow (within 1 mm near surface) and very deep in materials (hundred of mm). Near-surface measurement requires both the accurate determination of the effective measurement position associated with precise location of specimen, calculation of centroid and correction for an anomalous near-surface effect. The strain measurements on a shot-peened surface in titanium alloy were carried out using the methodology mentioned above. The result is comparable to that obtained from X-ray diffraction. The latter was exploited by studying the effect of wavelength-dependent attenuation in materials. Experiments and theoretical analysis on aluminium and iron show that the effect is small for a strain scanner using radial collimator and time-of-flight technique. However, the reduction of the diffraction peak intensity, as a function of the amount of material in the beam path, reveals that great care should be taken when measuring texture as a function of depth in materials. The neutron diffraction technique was applied to several sets of engineering strain measurements. Firstly, 3-D residual stresses surrounding a cold expanded hole in a high strength aluminium alloy plate were measured. The result agrees well with that from modified Sachs' method after taking the effect of gauge volume averaging into account. Second, measurements of strain distributions in a Q-joint under zero and 30 kN load have been carried out, which provides a confirmation of the excellence of the joint design as the fastener system has completely shielded the fastener hole from deleterious tensile strains under operational loading. Finally, calibration strain measurement for an energy dispersive neutron transmission spectrometer was performed for the first time and it is found that the transmission spectrometer is feasible for strain and phase transformation measurement.
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Lobban, Colin. "Neutron diffraction studies of ices." Thesis, University College London (University of London), 1998. http://discovery.ucl.ac.uk/10065569/.

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This thesis reports on a series of neutron diffraction measurements on ices in the medium-pressure range of the phase diagram in order to address several outstanding issues. The structure of ice II under its thermodynamic conditions of stability is unknown. Previous studies have used helium gas as the pressurising medium, which is included within the ice structure. Argon gas has been used in this work as the pressure medium, and the detailed structure of ice II is presented and discussed. Similarly, the structure of ice V under its conditions of stability is established for the first time by this work. For ices III and V, the presence of orientational order is controversial with the results obtained from structural studies on recovered samples differing from conclusions drawn from dielectric and spectroscopic measurements. The results obtained in this work indicate partial ordering of the water molecules which, for ice V, appears to be both temperature and pressure dependant. Ice IV is a metastable phase of ice that is difficult to form. A structure has been proposed on the basis of samples recovered to ambient pressure at 110 K . This work has successfully prepared ice IV at high temperature and pressure and a structure refinement confirms, for the first time, that the proposed structure is correct. During studies within the established stability region of ice V, features were observed which could not be identified as any ice or clathrate phase. Further work in this region has successfully formed and retained one such phase. The structure has been solved and the phase identified as a new ice structure. The topology of this phase is unlike that of any known solid water structure, and contains a mixture of seven- and eight-membered rings. General issues concerning hydrogen-bonding, compressibility and expansivity of these phases are discussed.
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Tait, Kimberly. "Inelastic Neutron Scattering and Neutron Diffraction Studies of Gas Hydrates." Diss., The University of Arizona, 2007. http://hdl.handle.net/10150/194926.

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Gas hydrates (clathrates) are elevated-pressure (P) and low-temperature (T) solid phases in which gas molecule guests are physically incorporated into hydrogen-bonded, cage-like ice host frameworks. Natural clathrates have been found worldwide in permafrost and in ocean floor sediments, as well as in the outer solar system (comets, Mars, satellites of the gas giant planets). Diffraction patterns have been collected of gas hydrates at various methane and ethane compositions by preparing samples in an ex situ gas hydrate synthesis apparatus, and CO₂ gas hydrates were prepared in situ to look at the kinetics of formation. Storage of hydrogen in molecular form within a clathrate framework has been one of the suggested methods for storing hydrogen fuel safely, but pure hydrogen clathrates H₂(H₂O)₂ form at high pressures. It has been found that mixed clathrates (a stabilizer molecule in the large cage) and hydrogen gas together can reduce the pressures and temperatures at which these materials form. In situ neutron inelastic scattering experiments on hydrogen adsorbed into a fully deuterated tetrahydrofuran water ice clathrate show that the adsorbed hydrogen has three rotational excitations (transitions between J = 0 and 1 states) at approximately 14 meV in both energy gain and loss. These transitions could be unequivocally assigned the expected slow conversion from ortho- to para-hydrogen resulted in a neutron energy gain signal at 14 meV, at a temperature of 5 K (kT= 0.48 meV). A doublet in neutron energy loss at approximately 28.5 meV are interpreted as J = 1 → 2 transitions. In situ neutron inelastic scattering experiments on hydrogen adsorbed into ethylene oxide, a structure I former, were also carried out at the Los Alamos Neutron Scattering Center (LANSCE). There is convincing evidence (shifted rotational mode of molecular hydrogen) that hydrogen is capable of diffusing in the small cages of ethylene oxide clathrate. Values are also obtained for the librational modes of enclathrated ethylene oxide and several water translation modes. Also reported for the first time are the internal modes (higher frequencies) of ethylene oxide in ethylene oxide clathrate as measured by inelastic neutron scattering.
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Morrell, Jonathan T. "Experimental evaluation of polychromatic neutron diffraction." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/112368.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, 2017.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 57-58).
Neutron diffraction is a technique that allows scientists to measure the arrangement and motions of atoms in a crystalline lattice by observing neutrons scattering at angles that are characteristic of the interatomic distances of the crystal. This is useful for studying the response of crystals to stress, irradiation, or for observing their phases. This thesis implements and analyzes a technique known as polychromatic neutron powder diffraction, which has the potential to be used by an instrument to make many simultaneous neutron diffraction measurements. In this experiment, powder diffraction patterns were measured with a diffractometer in polychromatic mode, using both angle-dispersive and wavelength-dispersive scans of a silicon powder. The intensity and resolution of the Bragg peaks with the instrument in this configuration were compared to Bragg peaks measured by the same instrument in a monochromatic configuration. The intensity of the polychromatic mode was only comparable to the monochromatic mode with looser collimation, which had the consequence of increasing the widths of the measured peaks. This resulted in a polychromatic signal intensity that was greater than the monochromatic signal intensity, and a Bragg peak that was wider than the monochromatic Bragg peak. The effects of the collimators and the sample to detector distances were quantified in experiment and in ray-tracing simulations. While both the monochromatic and the polychromatic configurations had similar counting rates in this experiment, they were both limited by the high background due to the open-beam geometry. A successful implementation of a polychromatic instrument would require substantial filtering and shielding to overcome this effect.
by Jonathan T. Morrell.
S.B.
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Dashjav, Enkhtsetseg, Raphael Hermann, and Frank Tietz. "High-temperature Neutron Diffraction of Li1.2Al0.2Ti1.8P3O12." Diffusion fundamentals 21 (2014) 21, S.1-2, 2014. https://ul.qucosa.de/id/qucosa%3A32431.

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Reynolds, John Melton. "Neutron diffraction and reflection studies of superconductors." Thesis, University of Oxford, 1998. http://ora.ox.ac.uk/objects/uuid:bab01bde-f42e-41ca-830e-655d41499408.

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I have studied two magnetic properties of superconductors using different neutron scattering techniques. Due to their magnetic moment and lack of electrical charge, neutrons can provide an extremely sensitive probe into magnetism on a small scale. Unusual magnetic structures have previously been observed in the non-superconducting PrBa2Cu3O6+δ, in particular showing a coupling between the rare-earth and the Cu-O2 planes. For comparison, I have used elastic neutron scattering to measure the temperature dependent magnetic structure of the high-Tc superconductor NdBa2Cu3O7, and its nonsuperconducting reduced form NdBa2Cu3O6. The magnetic structures of both the Nd and Cu sub-lattices are presented. Measurements are shown for single crystals of both the oxygenated and reduced form, and also for a non-stoichiometric single crystal with Nd substituted on the Ba sites. I present a quantitative analysis of the magnetic moments, with account taken of the instrumental resolution including sample mosaicity and intrinsic peak shapes. No evidence was found for any coupling of the type seen in PrBa2Cu3O6+δ. Many of the underlying properties of superconductors are evidenced in the way magnetic fields are excluded in the different states. I have used polarized neutron reflectometry to measure the magnetic field profile in thin film superconductors. I present measurements for pure niobium and preliminary measurements for YBa2Cu3O7. The samples studied are much thicker than those previously measured, to provide a closer match to the bulk superconductor properties and allow meaningful measurements of the higher field states. For niobium, the applied field dependence is measured for fields covering the Meissner and mixed states, and models are compared for these states and the surface superconductivity state.
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Ibberson, Richard M. "Neutron power diffraction studies of molecular crystals." Thesis, University of Reading, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357200.

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Criswell, Leah. "Neutron diffraction and quasielastic neutron scattering studies of films of N-alkanes and a branched alkane absorbed on graphite." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/6010.

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Thesis (Ph. D.)--University of Missouri-Columbia, 2007.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on March 11, 2008) Includes bibliographical references.
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Unruh, Troy Casey. "Development of a neutron diffraction system and neutron imaging system for beamport characterization." Thesis, Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/2324.

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Filippone, Roberto. "Martensite characterization in multiphase steels using neutron diffraction." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=32958.

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Previous use of the diffraction technique as a means of characterizing microstructure in multiphase steels has been generally limited to measurements of retained austenite. Other phases, specifically martensite, have not been examined in complex microstructures since there exists peak overlap with ferrite. This research looks at using neutron diffraction as a means to characterize martensite in a multiphase steel microstructure, thus providing a more complete characterization tool.
Three low carbon steels, comprised of a dual-phase, ferrite-martensite microstructure, were used in this study. Two diffraction methods were investigated; a direct deconvolution of the martensite peaks from the ferrite peak, and an indirect determination of martensite volume fraction from ferrite peak broadening. Lastly, mechanical properties were investigated in order to determine if a correlation exists with ferrite peak broadening.
The results indicate that the martensite phase has a prominent strain broadening effect in diffraction. The nature of this strain effect was hypothesized and a model was developed to confirm the findings. Finally, tensile testing showed that the mechanical properties were dependent on peak broadening and martensite volume fraction.
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Books on the topic "Neutron diffraction"

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Khidirov, Irisali. Neutron Diffraction. Rijeka, Croatia: Intech, 2012.

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Izyumov, Yurii A., and Ruslan P. Ozerov. Magnetic Neutron Diffraction. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4684-0712-9.

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P, Ozerov Ruslan, ed. Magnetic Neutron Diffraction. Boston, MA: Springer US, 1995.

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1917-, Bacon G. E., and International Union of Crystallography, eds. Fifty years of neutron diffraction: The advent of neutron scattering. Bristol: Hilger with the assistance of the International Union of Crystallography, 1987.

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Izyumov, Yu A., V. E. Naish, and R. P. Ozerov. Neutron Diffraction of Magnetic Materials. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3658-1.

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J, Howard Christopher, ed. Applications of neutron powder diffraction. New York: Oxford University Press, 2008.

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A, Izi͡umov I͡U. Neutron diffraction of magnetic materials. New York: Consultants Bureau, 1991.

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Izyumov, Yu A. Neutron Diffraction of Magnetic Materials. Boston, MA: Springer US, 1991.

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Izyumov, Yu A. Neutron diffraction of magnetic materials. New York: Consultants Bureau, 1991.

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Authier, André, Stefano Lagomarsino, and Brian K. Tanner, eds. X-Ray and Neutron Dynamical Diffraction. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4615-5879-8.

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Book chapters on the topic "Neutron diffraction"

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Frauenfelder, Hans. "Neutron Diffraction." In The Physics of Proteins, 437–40. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-1-4419-1044-8_30.

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Biggin, Susan. "Neutron Diffraction." In Molten Salt Techniques, 289–315. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4613-1847-7_5.

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Holden, Thomas M. "Neutron Diffraction." In Practical Residual Stress Measurement Methods, 195–223. Chichester, UK: John Wiley & Sons, Ltd, 2013. http://dx.doi.org/10.1002/9781118402832.ch8.

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Blakeley, Matthew Paul, and Stuart John Fisher. "Macromolecular Neutron Diffraction." In Encyclopedia of Biophysics, 1353–61. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-16712-6_658.

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Huot, Jacques, and Radovan Černý. "Neutron Powder Diffraction." In Neutron Scattering and Other Nuclear Techniques for Hydrogen in Materials, 31–89. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-22792-4_3.

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Chieux, P., and J. C. Dore. "Neutron Diffraction Techniques." In Hydrogen-Bonded Liquids, 101–16. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3274-9_8.

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Schlenker, M., and J. Baruchel. "Neutron diffraction topography." In International Tables for Crystallography, 124–25. Chester, England: International Union of Crystallography, 2006. http://dx.doi.org/10.1107/97809553602060000583.

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Howard, C. J., and E. H. Kisi. "Neutron powder diffraction." In International Tables for Crystallography, 66–101. Chester, England: International Union of Crystallography, 2019. http://dx.doi.org/10.1107/97809553602060000938.

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Von Dreele, R. B. "11. NEUTRON POWDER DIFFRACTION." In Modern Powder Diffraction, edited by David L. Bish and Jeffrey E. Post, 333–72. Berlin, Boston: De Gruyter, 1989. http://dx.doi.org/10.1515/9781501509018-014.

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Schlenker, Michel, and José Baruchel. "Neutron Topography." In X-Ray and Neutron Dynamical Diffraction, 177–86. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4615-5879-8_11.

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Conference papers on the topic "Neutron diffraction"

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Buttimore, N. H., Roberto Fiore, Igor Ivanov, Alessandro Papa, and Jacques Soffer. "Forward Helion Scattering and Neutron Polarization." In DIFFRACTION 2008: International Workshop on Diffraction in High Energy Physics. AIP, 2009. http://dx.doi.org/10.1063/1.3122170.

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Kopeliovich, B. Z., I. K. Potashnikova, Iván Schmidt, and J. Soffer. "Forward neutron production by polarized protons." In DIFFRACTION 2012: International Workshop on Diffraction in High Energy Physics. AIP, 2013. http://dx.doi.org/10.1063/1.4802143.

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"Imaging Based Detector with Efficient Scintillators for Neutron Diffraction Measurements." In Neutron Radiography. Materials Research Forum LLC, 2020. http://dx.doi.org/10.21741/9781644900574-13.

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"High-resolution Detector for Neutron Diffraction and Quantification of Subsurface Residual Stress." In Neutron Radiography. Materials Research Forum LLC, 2020. http://dx.doi.org/10.21741/9781644900574-16.

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Togawa, Manabu, Roberto Fiore, Igor Ivanov, Alessandro Papa, and Jacques Soffer. "Measurements of leading neutron production in polarized pp collisions at RHIC-PHENIX." In DIFFRACTION 2008: International Workshop on Diffraction in High Energy Physics. AIP, 2009. http://dx.doi.org/10.1063/1.3122165.

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GRAY, EVAN, and ERICH KISI. "STRUCTURE DETERMINATION BY NEUTRON POWDER DIFFRACTION." In Proceedings of the Sixth Summer School of Neutron Scattering. WORLD SCIENTIFIC, 1998. http://dx.doi.org/10.1142/9789814447270_0003.

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HEWAT, A. W. "NEUTRON POWDER DIFFRACTION AND NEW MATERIALS." In Proceedings of the Eighth Summer School on Neutron Scattering. WORLD SCIENTIFIC, 2000. http://dx.doi.org/10.1142/9789812792150_0004.

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Rupp, Romano A. "Optically Recorded Diffraction Elements for Neutron Scattering." In The European Conference on Lasers and Electro-Optics. Washington, D.C.: Optica Publishing Group, 1998. http://dx.doi.org/10.1364/cleo_europe.1998.cthc1.

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Eight years ago we reported for the first time on neutron diffraction from holographic gratings written in light-sensitised poly(methyl methacrylate) [1] Since then, several improvements have been achieved: Replacement of a methyl group by nitrogen in poly(cyano acrylate) increases the coherent scattering amplitude by a factor of approximately 2.5 without significant deterioration of the amplitude of the light-optical holographic grating. Incoherent neutron scattering is further reduced by perdeuteration and the effect of the low lateral coherence of the neutron beams could be accounted for. By now holographic gratings with neutron diffraction efficiencies of more than 70 % for neutron wavelengths of about 4 nm can be produced. By exploiting the inherent nonlinearity of the kinetics of the photopolymerization process gratings with spatial frequencies of nearly 10,000 lines/mm have been achieved recently [2].
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"Diffraction Line-Broadening Analysis of Al2O3/Y-TZP Ceramic Composites by Neutron Diffraction Measurement." In Mechanical Stress Evaluation by Neutron and Synchrotron Radiation. Materials Research Forum LLC, 2018. http://dx.doi.org/10.21741/9781945291678-8.

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Mikula, Pavol, Miroslav Vra´na, Lubos Mra´z, and Leif Karlsson. "High-Resolution Neutron Diffraction Employing Bragg Diffraction Optics: A Tool for Advanced Nondestructive Testing of Materials." In ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2008. http://dx.doi.org/10.1115/esda2008-59174.

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The present paper deals with an efficient use of high-resolution neutron diffraction for material research studies, namely for studies of internal stresses. It is demonstrated that a conventional neutron diffractometer equipped with focusing elements can be used as neutron strain/stress scanner with medium power neutron sources. Principles of this enhanced technique are introduced and an example of internal strain/stress measurements in the vicinity of welds is presented.
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Reports on the topic "Neutron diffraction"

1

Copley, John R. D. Neutron powder diffraction. Gaithersburg, MD: National Institute of Standards and Technology, 1998. http://dx.doi.org/10.6028/nist.ir.6204.

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2

Gonzalez, Javier M. Applications of Neutron Diffraction Protein Crystallography. Office of Scientific and Technical Information (OSTI), December 2012. http://dx.doi.org/10.2172/1057605.

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3

Wang, X. L., S. Spooner, C. R. Hubbard, B. Taljat, and Z. Feng. Characterization of welding residual stresses with neutron diffraction. Office of Scientific and Technical Information (OSTI), March 1998. http://dx.doi.org/10.2172/672109.

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4

Goldstone, J. A., M. A. M. Bourke, and N. Shi. Internal strain measurement using pulsed neutron diffraction at LANSCE. Office of Scientific and Technical Information (OSTI), December 1994. http://dx.doi.org/10.2172/10103853.

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5

Brown, Donald W., Bjorn Clausen, Thomas A. Sisneros, and Maria A. Okuniewski. Neutron Diffraction Measurement of Residual Stresses in ?OSU Plate.? Office of Scientific and Technical Information (OSTI), June 2013. http://dx.doi.org/10.2172/1084566.

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6

Vogel, S. G., D. J. Alexander, I. J. Beyerlein, M. A. Bourke, and D. W. Brown. Investigation of Texture in ECAP Materials Using Neutron Diffraction. Fort Belvoir, VA: Defense Technical Information Center, January 2003. http://dx.doi.org/10.21236/ada426148.

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7

Sadergaski, Luke, Sam Schrell, Kaara Patton, and Matthias Frontzek. The First Neptunium Dioxide Neutron Diffraction Experiment at HFIR. Office of Scientific and Technical Information (OSTI), October 2021. http://dx.doi.org/10.2172/1826018.

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8

Holden, T., J. Root, and R. Hosbons. CWI1988-Andi-12 Neutron Diffraction of Axial Residual Strains in the Vicinity of a Girth Weld. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), April 1988. http://dx.doi.org/10.55274/r0011390.

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Recent research has shown that neutron diffraction is a practical non-destructive method for determining residual strains in the vicinity of a girth weld in line pipe. The basis of the technique is that the distance between planes of atoms is used as a miniature, directional, internal strain gauge, just as for X-ray measurements. However, the penetration of neutrons into metals ls from 1000 to 10,000 times greater than that of X-rays, so that measurements may easily be made throughout the thickness of steel pipe including the region of the weld itself. The purpose of the present measurements was to characterize the axial residual strains remaining in linepipe after two pieces had been joined with a girth weld. This report summarizes the measurements of the axial residual strains in each of two pipes of thickness 11 and 16 mm at the 6:00, 1:30 and 10:00 positions.
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9

Winton, William W., Sven C. Vogel, Helmut M. Reiche, David M. Waschezyn, Jose A. Gasca, Christopher D. Hatch, and Adam Warniment. RF Heater for in situ Neutron Diffraction and Proton Radiography. Office of Scientific and Technical Information (OSTI), November 2013. http://dx.doi.org/10.2172/1107122.

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10

Yelon, William B. In-Situ Neutron Diffraction Studies of Complex Hydrogen Storage Materials. Office of Scientific and Technical Information (OSTI), May 2013. http://dx.doi.org/10.2172/1079211.

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