Javier Dawidowski

TL;DR: In this paper, an updated table of neutron scattering lengths and cross sections for most of the known nuclides, based on preexisting works, is presented, including the coherent and incoherent scattering lengths, as well as the spin-dependent scattering lengths b + and b −, in cases where this information is available.

TL;DR: In this article, the microscopic dynamics of several phases of solid ethanol are studied under the same thermodynamic conditions by inelastic neutron scattering, and it is found that the vibrational density of states of the orientational glass phase, where the molecules are arranged on an ordered lattice but with disordered orientations, is very similar to that of the structural glass phase.

TL;DR: The origin of the well-defined collective excitations found in liquid para-H2 by recent experiments is investigated and the results provide fully quantitative evidence of quantum effects on the dynamics of a simple liquid.

TL;DR: The existence of an orientationally disordered cubic phase of solid ethanol is revealed by x-ray diffraction and Raman spectroscopic measurements and the relevance of the presentings for current discussions on glassy dynamics is analyzed in some detail.

TL;DR: In this paper, the total cross section of polyethylene at room temperature was measured for neutrons with energies between 10 −3 and 10 eV, and it was shown that a synthetic scattering function is able to produce good agreement with the measured values.