Microscopic dynamics of glycerol: a QENS study

6th Meeting of the Spanish Neutron Scattering Association

Vispa, A.^1 ; Rovira-Esteva, M.^1 ; Ruiz-Martín, M.D.^1 ; Busch, S.^2 ; Unruh, T.^3 ; Pardo, L.C.^1 ; Tamarit, J. Ll^1

Grup de Caracterització de Materials, Departament de Física i Enginyieria Nuclear, Universitat Politècnica de Catalunya, Diagonal 647, Barcelona, Catalonia

08028, Spain^1

Department of Biochemistry, University of Oxford, United Kingdom^2

Lehrstuhl fur Kristallographie und Strukturphysik, Universität Erlangen, Germany^3

关键词: Diffusive mechanisms;    Fitting algorithms;    Incoherent neutron scatterings;    Liquid state;    Microscopic dynamics;    Model Selection;    Picosecond time scale;    Quasielastic;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/549/1/012013/pdf
DOI  :  10.1088/1742-6596/549/1/012013

来源: IOP

【 摘 要 】

We report on a quasielastic incoherent neutron scattering (QENS) experiment on liquid glycerol. QENS data were collected at the temperature T=380 K and with a resolution (FWHM) R=55μeV. The analysis of the quasielastic signal enables us to draw a consistent picture of the diffusive mechanism on a picosecond time scale and to compare with most recent models for glycerol dynamics. Model selection, performed with the fitting algorithm FABADA, gives us a preliminary description about the motions of the glycerol molecules in its liquid state.