The static structure factors S( Q) of liquid normal H-2 and D-2 have been measured in the wave-vector region 5 nm(-1) < Q < 30 nm(-1) through X-ray scattering using two independent sets of data. While the first set has been derived using a standard liquid diffraction geometry, the second has been worked out integrating the dynamic structure factors S( Q, omega), measured through inelastic X-ray scattering spectroscopy. In the latter case the first spectral-moment sum rule has been used to obtain directly absolute static structure factor values. A comparison with quantum and classical Monte Carlo simulations shows that a quantitative agreement with the experimental data for both H-2 and D-2 can be obtained only if quantum effects are properly taken into account.
Cunsolo, A., Pratesi, G., Colognesi, D., Verbeni, R., Sampoli, M., Sette, F., et al. (2002). Microscopic structure in liquid hydrogen and deuterium: An X-ray scattering study. JOURNAL OF LOW TEMPERATURE PHYSICS, 129(3-4), 117-131 [10.1023/A:1020840005615].
Microscopic structure in liquid hydrogen and deuterium: An X-ray scattering study
Senesi, R.Membro del Collaboration Group
;
2002-01-01
Abstract
The static structure factors S( Q) of liquid normal H-2 and D-2 have been measured in the wave-vector region 5 nm(-1) < Q < 30 nm(-1) through X-ray scattering using two independent sets of data. While the first set has been derived using a standard liquid diffraction geometry, the second has been worked out integrating the dynamic structure factors S( Q, omega), measured through inelastic X-ray scattering spectroscopy. In the latter case the first spectral-moment sum rule has been used to obtain directly absolute static structure factor values. A comparison with quantum and classical Monte Carlo simulations shows that a quantitative agreement with the experimental data for both H-2 and D-2 can be obtained only if quantum effects are properly taken into account.File | Dimensione | Formato | |
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