Self-distribution-function procedure in elastic incoherent neutron scattering for biosystems molecular motion characterization

Issue title: From Molecule to Tissue: XIII European Conference on the Spectroscopy of Biological Molecules, Palermo, Italy, August 28–September 2, 2009, Part 2 of 2

Article type: Research Article

Authors: Magazù, Salvatore^; | Migliardo, Federica^; | Benedetto, Antonio | Gonzalez, Miguel | Mondelli, Claudia

Affiliations: Dipartimento di Fisica, Università di Messina, Messina, Italy | Laboratoire de Dynamique et Structure des Matériaux Moléculaires, UNESCO–L'Oreal University of Lille I, Villeneuve d'Ascq, France | Consiglio Nazionale delle Ricerche – Istituto Officina dei Materiali, Institut Laue–Langevin, Grenoble, France

Note: [] Corresponding author: Salvatore Magazù, Dipartimento di Fisica, Università di Messina, C. da Papardo n°31, P.O. Box 55, Vill. S. Agata, 98166 Messina, Italy. Tel.: +39 0906765025; Fax: +39 090395004; E-mail: [email protected].

Abstract: In the present contribution we present a new procedure for the Mean Square Displacement (MSD) determination from Elastic Incoherent Neutron Scattering (EINS) where the connection between the Self-Distribution Function (SDF) and the measured EINS intensity profile is highlighted. We show how the SDF procedure allows both the total and the partial MSD evaluation, through the total and the partial SDFs. The procedure is applied on EINS data collected, by the IN13 backscattering spectrometer (ILL, Grenoble), on aqueous mixtures of sucrose and trehalose.

Keywords: Molecular motions, self-distribution function, mean square displacement, resolution effects, elastic incoherent neutron scattering, homologous disaccharides

DOI: 10.3233/SPE-2010-0454

Journal: Spectroscopy, vol. 24, no. 3-4, pp. 387-391, 2010