ISSN:
1089-7690
Quelle:
AIP Digital Archive
Thema:
Physik
,
Chemie und Pharmazie
Notizen:
We report the results of small-angle neutron scattering measurements performed on supercritical heavy water at wave-number transfers between 0.07 and 0.36 Å−1. The data were collected along five different isochores at temperatures about 1.15, 2.20, and 5.50 °C higher than the measured critical temperature. The density, ρ, was in the range (ρc−0.062)〈ρ〈(ρc+0.082) g cm−3, where ρc is the critical density. The shape of the scattering spectra is represented by the expression previously used for those measured along the critical isochore [Bonetti et al., J. Chem. Phys. 112, 268 (2000)]. The temperature and density dependencies of the isothermal compressibility and the correlation length can be reasonably described using a parametric representation of the thermodynamic space and corrections to scaling that include odd terms to account for the asymmetry of the system. © 2001 American Institute of Physics.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1063/1.1392362
