THE GEOMETRIC PHASE EFFECT ON DIFFERENTIAL CROSS-SECTIONS IN CHEMICAL-REACTIONS - A CLASSICAL MECHANICAL APPROACH

The considerable agreement between experimental and theoretical produc t rotational state distributions for the D + H-2 reaction obtained wit h the inclusion of the geometric phase effect has created interest to see the influence of it on differential cross sections. Using the gene ral hyperspherical formulation of the vector potential arising due to an arbitrary position of the conical intersection of the adiabatic pot ential energy hypersurfaces, we have calculated the distribution of sc attering angles. This study has been carried out by quasi-classical tr ajectory calculations which require little computational effort. The f eatures obtained by our study are qualitatively the same as those obta ined quantum mechanically by Kuppermann and Wu. (C) 1998 Elsevier Scie nce B.V. All rights reserved.