Javier Dawidowski

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J. Dawidowski,1,* F. J. Bermejo,2,† M. L. Ristig,3 C. Cabrillo,4 and S. M. Bennington5 1Consejo Nacional de Investigaciones Científicas y Técnicas, Centro Atómico Bariloche and Instituto Balseiro, Comisión Nacional de Energía Atómica, Universidad Nacional de Cuyo, (8400) Bariloche, Argentina 2C.S.I.C., Department of Electricity and Electronics, University(More)
We present a new formalism to obtain momentum distributions in condensed matter from Neutron Compton Profiles measured by the Deep Inelastic Neutron Scattering technique. The formalism describes exactly the Neutron Compton Profiles as an integral in the momentum variable y. As a result we obtain a Volterra equation of the first kind that relates the(More)
We investigate anomalies ascribed to quantum entanglement phenomena recently reported in deep inelastc neutron scattering (DINS) measurements by an independent neutron technique on H(2)O/D(2)O mixtures. We performed transmission experiments to study several liquid H(2)O/D(2)O mixtures at room temperature in the epithermal energy range. We obtain the total(More)
The vibrational spectrum of hydrogen atoms in magnesium hydride has been studied by means of inelasticneutron and Raman-scattering experiments between 12 and 295 K. After careful evaluation of multiple scattering and multiphonon contributions, we provide a vibrational frequency spectrum up to 180 meV and the mean-square displacement of hydrogen atoms. The(More)
We present a method of analysis of inelastic neutron scattering (INS) experiments aiming at obtaining the density of phonon states in an absolute scale, as well as a reliable value of the mean-square displacement of the atoms. This method requires the measurement of the neutron total cross section of the sample as a function of energy, which provides a(More)
Thomas Lindenau, Manfred L. Ristig, Klaus A. Gernoth, Javier Dawidowski, and Francisco J. Bermejo Institut für Theoretische Physik, Universität zu Köln D–50937 Köln, Germany ristig@thp.uni-koeln.de School of Physics and Astronomy, The University of Manchester Manchester, United Kingdom k.a.gernoth@man.ac.uk Consejo Nacional de Investigationes Cientificas y(More)
We present a full set of procedures to evaluate the experimental corrections needed to derive physically meaningful quantities from the measured neutron intensities in inelastic neutron-scattering experiments. Multiple-scattering corrections are evaluated by means of a Monte Carlo code, in which a combination of experimental data and the Synthetic Model is(More)
J. Dawidowski,* F. J. Bermejo, M. L. Ristig, B. Fåk, C. Cabrillo, R. Fernández-Perea, K. Kinugawa, and J. Campo Consejo Nacional de Investigaciones Cientı́ficas y Técnicas, Centro Atómico Bariloche and Instituto Balseiro, Comisión Nacional de Energı́a Atómica, Universidad Nacional de Cuyo, (8400) Bariloche, Argentina Department of Electricity and(More)
F. J. Bermejo, B. Fåk, S. M. Bennington, K. Kinugawa, J. Dawidowski, M. T. Fernández-Dı́az, C. Cabrillo, and R. Fernández-Perea Consejo Superior de Investigaciones Cientı́ficas, Serrano 123, E-28006 Madrid, Spain Department of Electricity and Electronics, University of the Basque Country, P.O. Box 644, Bilbao 48080, Spain ISIS Facility, Rutherford Appleton(More)