NIST Special PublicationThe Institute, 2001 |
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... hydrogen cold source to be installed during 2001. The cold source , which slows down thermal neutrons , is the round object located right - middle . Surrounding it is a vacuum jacket located just to the right and left of the cold source ...
... hydrogen cold source to be installed during 2001. The cold source , which slows down thermal neutrons , is the round object located right - middle . Surrounding it is a vacuum jacket located just to the right and left of the cold source ...
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... hydrogen cold source passed all required pressure tests , and the final assembly is now being prepared for insertion into the reactor in 2001. Finally , steady progress has been made in preparing for a license renewal application to the ...
... hydrogen cold source passed all required pressure tests , and the final assembly is now being prepared for insertion into the reactor in 2001. Finally , steady progress has been made in preparing for a license renewal application to the ...
Page 1
... hydrogen atoms than they do from heavy hydrogen ( deuterium ) , allowing selective study of individual regions of molec- ular systems . Finally , neutrons interact only weakly with materials , providing the opportunity to study samples ...
... hydrogen atoms than they do from heavy hydrogen ( deuterium ) , allowing selective study of individual regions of molec- ular systems . Finally , neutrons interact only weakly with materials , providing the opportunity to study samples ...
Page 8
... hydrogen is much larger than for virtually all the other elements . Over the past twenty years , neutron vibrational spectra have been collected for a broad array of both hydrogenous and non- hydrogenous systems utilizing a first ...
... hydrogen is much larger than for virtually all the other elements . Over the past twenty years , neutron vibrational spectra have been collected for a broad array of both hydrogenous and non- hydrogenous systems utilizing a first ...
Page 9
... hydrogen bonding interac- tions in the solid cause strong perturbations in the OH wagging mode predicted near 45 meV for the isolated molecule . 120 100 80 Energy ( meV ) 60 100 200 Temperature ( K ) Intensity Counts Neutron NO2 1 ...
... hydrogen bonding interac- tions in the solid cause strong perturbations in the OH wagging mode predicted near 45 meV for the isolated molecule . 120 100 80 Energy ( meV ) 60 100 200 Temperature ( K ) Intensity Counts Neutron NO2 1 ...
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Common terms and phrases
Activation Analysis Antiferromagnetic atoms Broholm71 Carbon Nanotubes Center for Neutron Chem Chen-Mayer Chopper cold neutron Crystal Structure D. A. Neumann 105 detector Determination Dynamics energy Erwin exchange bias Ferromagnetic FIGURE Fullerene Gaithersburg Gnäupel-Herold 199 Hydrogen Institute of Standards instrument intensity J. W. Lynn Lamaze lattice lithium Macromol Magnetic Order Magnetic Structure MBLA measurements Molecular molecules monochromator nanotubes NCNR neutron beam Neutron Depth Profiling Neutron Diffraction Neutron Reflectivity Neutron Reflectometry Neutron Research National Neutron Scattering Study NIST NIST Center Nucl P. C. Brand peak Phase Transitions phase-contrast image phonon Phys Polarized Polymer Powder Diffraction properties protein protons pyrazine Q. Z. Huang quasielastic R. M. Lindstrom 106 Radioanal reactor Research National Institute Residual Stress resolution sample Satija Small Angle Neutron solid Standards and Technology surface technique Technology Gaithersburg temperature thermal Thin Films Udovic University vortex x-ray Yildirim 105 Zeolites
Popular passages
Page 18 - ... nanoropes"[10]. The intertube interactions in nanoropes can be probed by applying external pressure to vary the intertube distance. For fullerenes, such high-pressure studies have yielded many interesting results including new compounds such as the pressure-induced polymeric phases of C«>- It is, therefore, of interest to inquire if similar covalent-bonding can occur between the nanotubes in a rope. This could have important consequences for nanoscale device applications and composite materials...
Page 19 - The new pressure-induced, high density phasesflO] reported here may provide a way of synthesizing novel carbon base materials with interesting physical properties. For example interlinking of the nanotubes may improve the mechanical performance of composites based on these materials. The change in the band gap of a SWNT with applied pressure can be exploited to realize various quantum devices on a single nanotube with variable and reversible electronic properties [10]. Finally we note that...
Page 19 - ... Fig.3(a)). This two dimensional interlinked structure is about four times stiffer than the ID interlinked phase and sixteen times stiffer than the vdW nanoropes. We observe that applying even higher pressures yields more complicated and denser phases for many of the nanoropes studied here (see Fig.3). For (9,0) nanoropes, we find that the nanotubes are interlinked along three directions forming a hexagonal network. The length of the intertube bond, dC-c= 1.644 A, is significantly elongated for...
Page 31 - NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD...
Page 9 - Laboratory for Research on the Structure of Matter and Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA...
Page 41 - Chemical Science and Technology Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899.
Page 19 - T. Yildirim, O. Gulseren, C. Kilic, and S. Ciraci, Phys. Rev. B 62, 12648 (2000).
Page 69 - Su TJ, Green RJ, Wang Y, Murphy EF, Lu JR, Ivkov R, Satija SK, 'Adsorption of lysozyme onto the silicon oxide surface chemically grafted with a monolayer of pentadecyl-1-ol', Langmuir, 2000 16 4999-5007.
Page 18 - Carbon nanotubes, originally discovered as by products of fullerene synthesis [1], are now considered to be the building blocks of future nanoscale electronic and mechanical devices [2]. It is therefore desirable to have a good understanding of their electronic and mechanical properties and the interrelations between them. In particular, single wall carbon nanotubes (SWNT) provide a system where the electronic properties can be controlled by the structure of the nanotubes and by various deformations...