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  1. No Access

    Article

    In situ quasi-elastic scattering characterization of particle size effects on the hydration of tricalcium silicate

    The effects of different particle size distributions on the real-time hydration of tricalcium silicate cement paste were studied in situ by quasi-elastic neutron scattering. The changing state of water in the ...

    A. J. Allen, J. C. McLaughlin, D. A. Neumann… in Journal of Materials Research (2004)

  2. No Access

    Chapter and Conference Paper

    Inelastic Neutron Scattering Measurement of Pozzolan Performance in Portland Cement

    Pozzolanic materials such as silica fume or fly ash are added to Portland cement concrete mixes to reduce shrinkage and increase durability. One measure of a pozzolan’s performance is its consumption of calciu...

    R. A. Livingston, W. Bumrongjaroen… in Nondestructive Characterization of Materia… (2003)

  3. No Access

    Article

    The NIST high-flux backscattering spectrometer

    The neutron-backscattering technique extends the dynamic range of neutron time-of-flight and conventional triple-axis spectrometers down to μeV energies and is ideal for the study of slow motions in complex li...

    R.M. Dimeo, Z. Chowdhuri, A. Meyer, P.M. Gehring, D.A. Neumann in Applied Physics A (2002)

  4. No Access

    Article

    The effects of confinement on rotational tunneling

    We have measured the effects of confinement on rotational tunnel splitting using neutron-backscattering spectroscopy for the molecular solid methyl iodide at low temperature. In particular, we have studied met...

    R.M. Dimeo, D.A. Neumann in Applied Physics A (2002)

  5. No Access

    Chapter

    Quasielastic and Inelastic Neutron Scattering Studies of Layered Silicates

    The application of quasielastic and inelastic neutron scattering to layered silicates is still in its infancy, however the ease of calculating the expected spectrum from a given dynamical model, the extreme se...

    D. A. Neumann in Access in Nanoporous Materials (2002)

  6. No Access

    Article

    Proefpersonen met een heupprothese die op verschillende manieren lopen met een stok: spieractiviteit van de heupabductoren

    Het uitoefenen van een ‘matige maar niet veeleisende’ kracht bij het leunen op de stok

    D. A. Neumann in Stimulus (1999)

  7. No Access

    Article

    Inelastic neutron scattering study of the hydration of tricalcium silicate

    Inelastic neutron scattering is applied for the first time to monitor directly the concentration of calcium hydroxide formed during the hydration of tricalcium silicate. Results taken between 10 and 40 °C show...

    S. A. FitzGerald, D. A. Neumann, J. J. Rush… in Journal of Materials Research (1999)

  8. No Access

    Article

    Een elektromyografische analyse van de abductoren van de heup tijdens belasting: implicaties voor bescherming van het heupgewricht

    Aan de hand, aan één lichaamszijde meegedragen objecten, die tussen de 3 en 30% van het lichaamsgewicht bedroegen, bleken, bij gezonde proefpersonen, de grootte van het emg van de heupabductoren aanmerkelijk te b...

    D. A. Neumann, A. D. Hasse in Stimulus (1995)

  9. No Access

    Article

    Orientational Dynamcs in White Phosphorus (P4)

    Above To = 196 K, white phosphorus, a solid composed of P4 molecules, exhibits a plastic crystal phase. Below this temperature, the structure is triclinic and orientationally ordered, with six molecules in a unit...

    W. A. Kamitakahara, F. Gompf, D. A. Neumann in MRS Online Proceedings Library (1994)

  10. No Access

    Article

    Application of Neutron Scattering Methods to Cementitious Materials

    A major part of the infrastructure is constructed of Portland cement concrete. Nevertheless, many aspects of this material are still not well understood. The main constituent of hydrated Portland cement is a h...

    Richard A. Livingston, D. A. Neumann, Andrew Allen… in MRS Online Proceedings Library (1994)

  11. No Access

    Article

    Neutron Scattering Studies of C61H2

    We report neutron diffraction measurements of orientational ordering, and inelastic neutron scattering measurements of the inter- and intra-molecular excitations, for the 6:5 an-nulene isomer (Cs symmetry) of C61

    D. A. Neumann, J. E. Fischer, J. R. D. Copley… in MRS Online Proceedings Library (1994)

  12. No Access

    Article

    Static and Dynamic Displacements in α-Phase FeCr

    A single crystal of α-Fe0.47Cr0.53 was annealed at 1100K, 5K above the a-phase transition temperature, for four days and then water quenched. A detailed investigation using X-ray synchrotron radiation was previou...

    J. L. Robertson, L. Reinhard, D. A. Neumann, S. C. Moss in MRS Online Proceedings Library (1994)

  13. No Access

    Article

    Using Quasielastic Neutron Scattering Techniques To Quantify Freezable Water In Portland Cement Paste

    Quasi-elastic neutron scattering provides detailed information of the atomic and molecular interactions responsible for a material's properties and is a direct and nondestructive method of measuring the motion...

    D. L. Gress, T. El-Korchi, R. A. Livingston… in MRS Online Proceedings Library (1994)

  14. No Access

    Article

    Design of a High-Flux Backscattering Spectrometer for Ultra-High Resolution Inelastic Neutron Measurements

    We discuss the design of a new backscattering spectrometer to be installed at the Cold Neutron Research Facility at the National Institute of Standards and Technology. Si (111) crystals cover both monochromato...

    P. M. Gehring, C. W. Brocker, D. A. Neumann in MRS Online Proceedings Library (1994)

  15. No Access

    Chapter and Conference Paper

    Heart Autoantibodies in Human Myocarditis and Cardiomyopathy: Virus and Skeletal Muscle Cross-reactivity

    Human myocarditis and idiopathic dilated cardiomyopathy (IDC) are clinical syndromes associated with multiple etiological mechanisms including cardiotropic virus infections, autoimmunity, cardiotoxic drugs, an...

    D. A. Neumann, G. S. Allen, C. R. Narins, N. R. Rose… in Idiopathic Dilated Cardiomyopathy (1993)

  16. No Access

    Article

    Rotations, Vibrations and Structure in Solid C60: Investigations by Neutron Scattering

    In a series of experiments on solid C60, the low-energy rotational dynamics of the molecules, the higher-energy vibrational spectra, and aspects of disorder in the static structure, have been studied. The nearly ...

    W. A. Kamitakahara, J. R. D. Copley, R. L. Cappelletti… in MRS Online Proceedings Library (1992)

  17. No Access

    Article

    Reflectivity and Grazing Angle Diffraction of Polarized Neutrons

    Using polarized-neutron reflectivity, one can determine the layer-averaged magnetic structure of films and multilayers with exquisite precision. By employing the closely related phenomenon of grazing-angle dif...

    J. F. Ankner, C. F. Majkrzak, D. A. Neumann, A. Matheny… in MRS Online Proceedings Library (1991)

  18. No Access

    Chapter

    Viruses and Myocarditis

    Autoimmune disease has often been postulated to result from the action of micro-organisms. The first autoimmune disease described in humans, paroxysmal cold haemoglobinuria, was associated with syphilis. Throu...

    N. R. Rose, D. A. Neumann, C. L. Burek… in The Role of Micro-organisms in Non-infecti… (1990)

  19. No Access

    Article

    Neutron Scattering Study of Layered Silicates Pillared with Alkylandnonium Ions

    Incoherent, inelastic neutron scattering has been used to study the vibrational spectra of tetramethylammonium montmorillonite and trimethylammonium vermiculite in the energy range 20–140 meV. For both systems...

    D. A. Neumann, J. M. Nicol, J. J. Rush, N. Wada… in MRS Online Proceedings Library (1989)

  20. No Access

    Article

    Charge Transfer and Bond Lengths in YBa2Cu3−xMxO6+y

    We discuss the effects of do** on the Cu chain sites in YBa2Cu3−xMxO6+y. The relationship between bond lengths obtained from neutron scattering and charge transfer is evaluated in terms of bond valence. In part...

    P. F. Miceli, J. M. Tarascon, L. H. Greene, P. Barboux… in MRS Online Proceedings Library (1989)

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