Scattering Matrix Determination by Asymptotic Analysis of Complex Scaled Resonance Wavefunctions: Model Cl + H2 Nonadiabatic Dynamics

摘要

It has previously been shown that partial widths of resonance states can be calculated by the asymptotic analysis of the complex scaled resonance wave function [U. Peskin, N. Moiseyev, and R. Lefebvre, J. Chem. Phys. 92, 2902 (1990)] and by the complex coordinate scattering theory [N. Moiseyev and U. Peskin, Phys. Rev. A 42, 255 (1990)]. Here we use these methods for the first time to calculate complex partial width amplitudes. The complex amplitudes are independent of the complex scaling parameters and are used for calculating the resonance contribution to the scattering matrix (the S matrix) in the case of Cl+H2 scattering described by two coupled one-dimensional potential energy curves. The background contribution to the S matrix was calculated by the use of one ClH2 potential energy curve only. The sum of the resonance and the background contributions provides accurate complex S matrix elements and transition probabilities, even at the resonance energy for which total reflection is obtained due to the interference between the two contributions. © 1999 American Institute of Physics. Scattering matrix determination by asymptotic analysis of complex scaled resonance wave functions: Model Cl+H2 nonadiabatic dynamics (PDF Download Available). Available from: http://www.researchgate.net/publication/234920681_Scattering_matrix_determination_by_asymptotic_analysis_of_complex_scaled_resonance_wave_functions_Model_ClH2_nonadiabatic_dynamics [accessed Nov 30, 2015].