Dynamics of colliding molecules : a theory of coherent neutron scattering for the plastic phase of CBr4
- 1 January 1984
- journal article
- Published by EDP Sciences in Journal de Physique
- Vol. 45 (3) , 587-596
- https://doi.org/10.1051/jphys:01984004503058700
Abstract
The cooperative dynamical behaviour of disordered rotating molecules subject to steric hindrance is studied by extending Glauber's kinetic Ising model. A mean-field level approximation of the transition probabilities is proposed which describes multiorientational systems with steric hindrance. The coherent neutron scattering function S(Q, ω) of CBr4 in its plastic phase is obtained. The invoked correlations induce a strong Q dispersion of the HWHM Γ(Q) which explains the experimental behaviourKeywords
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