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NEUTRON INCOHERENT SCATTERING OF ROTATIONAL AND TRANSITIONAL DYNAMICS IN ANISOTROPIC SYSTEMS – A NEW THEORETICAL APPROACH

N. Kirov1, J. Jordanova2,* , G. B. Hadjichristov1

Affiliation

  1. Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria
  2. Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria

Abstract

The rotational and translational contributions for the elastic incoherent structure factor (EISF) of neutron scattering in anisotropic systems are considered. New approaches are proposed, taking into account the molecular biaxiality and the steric hindrance of reorientational processes. The numerical data for EISF and intermediate scattering functions are in good agreement with the existing experimental data for aligned liquid crystals. The proposed new theoretical models are applicable to all kinds of anisotropic materials with rotational and translational degrees of freedom..

Keywords

Neutron incoherent scattering, Rotational dynamics, Transitional dynamics, Computer simulation.

Submitted at: Dec. 9, 2004
Accepted at: Jan. 26, 2005

Citation

N. Kirov, J. Jordanova, G. B. Hadjichristov, NEUTRON INCOHERENT SCATTERING OF ROTATIONAL AND TRANSITIONAL DYNAMICS IN ANISOTROPIC SYSTEMS – A NEW THEORETICAL APPROACH, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 1, pp. 215-222 (2005)