A method for analysis of high-resolution quasielastic neutron scattering (QENS) spectra of water in porous media is proposed and applied to the case of water in hydrated tricalcium and dicalcium silicates. We plot the normalized frequency-dependent susceptibility as a function of a scaling variable \omega\/omega(p), where omega(p) is the peak position of the susceptibility function. QENS data have been scaled into a single master curve and fitted with an empirical formula proposed by Bergman to obtain three independent parameters describing the relaxation dynamics of hydration water in calcium silicates.
Dynamic scaling of quasielastic neutron scattering spectra from interfacial water / E. FRATINI; S.H. CHEN; P. BAGLIONI; J.C. COOK; J.R.D. COPLEY. - In: PHYSICAL REVIEW E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS. - ISSN 1539-3755. - STAMPA. - 65:(2002), pp. 010201-1-010201-4. [10.1103/PhysRevE.65.010201]
Dynamic scaling of quasielastic neutron scattering spectra from interfacial water
FRATINI, EMILIANO;BAGLIONI, PIERO;
2002
Abstract
A method for analysis of high-resolution quasielastic neutron scattering (QENS) spectra of water in porous media is proposed and applied to the case of water in hydrated tricalcium and dicalcium silicates. We plot the normalized frequency-dependent susceptibility as a function of a scaling variable \omega\/omega(p), where omega(p) is the peak position of the susceptibility function. QENS data have been scaled into a single master curve and fitted with an empirical formula proposed by Bergman to obtain three independent parameters describing the relaxation dynamics of hydration water in calcium silicates.File | Dimensione | Formato | |
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