COLLECTIVE EXCITATIONS IN LIQUID DEUTERIUM - NEUTRON-SCATTERING AND CORRELATED-DENSITY-MATRIX RESULTS

Article

关键词: MOLECULAR LIQUIDS;    SELF-DIFFUSION;    SOLID HYDROGEN;    GAS;   

DOI  :  10.1103/PhysRevB.47.15097

来源: SCIE

【 摘 要 】

The collective dynamics of liquid deuterium is studied by means of inelastic neutron scattering (INS) at 20.14 K and under 2 bars of applied pressure using two different incident energies. The low-incident-energy (high-energy-resolution) spectra are studied in detail by means of a time-of-flight (TOF) technique, whereas the finite-frequency response is investigated using a higher incident energy on a triple-axis spectrometer (TAS). The main finding of our work is the observation by the latter experimental technique of well-defined collective excitations up to a momentum transfer of 3.8 angstrom-1. Comparisons are established with the dispersive behavior observed in other liquid systems as well as with the predictions from recent correlated-density-matrix calculations.

【 授权许可】

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