Neutron cross sections of cold moderators: An approximate algorithm for the description of synthetic kernels for molecular solids

Autor:	O. Lovotti, J.R. Granada, F. Cantargi, M.M. Sbaffoni, S. Petriw
Rok vydání:	2006
Předmět:	Physics Scattering Neutron scattering Condensed Matter Physics Small-angle neutron scattering Neutron temperature Electronic Optical and Magnetic Materials Computational physics Molecular solid Neutron cross section Neutron Electrical and Electronic Engineering Atomic physics Neutron moderator
Zdroj:	Physica B: Condensed Matter. :1309-1311
ISSN:	0921-4526
DOI:	10.1016/j.physb.2006.06.110
Popis:	An approximate synthetic scattering function aimed at the description of the interaction of thermal neutrons with hydrogenous molecular solids has been developed. At low incident neutron energies, lattice modes and molecular rotations are accounted for, through an expansion of the scattering law in few phonon terms. Simple representations of the molecular dynamical modes are used, in order to produce a reasonable description of neutron scattering kernels and cross sections with a minimum set of input data. As the neutron energies become much larger than that corresponding to the characteristic Debye temperature and to the rotational energies of the molecular solid, the “phonon formulation” transforms into the synthetic model for molecular gases. Results of the application to the cases of methane and ice are given.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::534c8768d0c139479a2d6df5b4ebd3a2 https://doi.org/10.1016/j.physb.2006.06.110 Zobrazit plný text záznamu Full Text from ScienceDirect