Computations were performed for calculating cross sections of electron impact scattering from astro-physical targets CaF, HCN and H2S at energies lower than their ionization potential. The results show that the use of...Computations were performed for calculating cross sections of electron impact scattering from astro-physical targets CaF, HCN and H2S at energies lower than their ionization potential. The results show that the use of highly accurate R-matrix method which includes all the relevant physics and chemistry of the molecule in its formalism generate features significantly different from the simple static exchange calculation. The data obtained shows interesting structures in the eigen-phase sums which may be attributed to the dissociation channel of the molecule.展开更多
An axisymmetric formulation for modeling three-dimensional deformation of structures of revolution is presented.The axisymmetric deformation model is described using the cylindrical coordinate system.Large displacemen...An axisymmetric formulation for modeling three-dimensional deformation of structures of revolution is presented.The axisymmetric deformation model is described using the cylindrical coordinate system.Large displacement effects and material nonlinearities and anisotropy are accommodated by the formulation.Mathematical derivation of the formulation is given,and an example is presented to demonstrate the capabilities and efficiency of the technique compared to the full three-dimensional model.展开更多
文摘Computations were performed for calculating cross sections of electron impact scattering from astro-physical targets CaF, HCN and H2S at energies lower than their ionization potential. The results show that the use of highly accurate R-matrix method which includes all the relevant physics and chemistry of the molecule in its formalism generate features significantly different from the simple static exchange calculation. The data obtained shows interesting structures in the eigen-phase sums which may be attributed to the dissociation channel of the molecule.
文摘An axisymmetric formulation for modeling three-dimensional deformation of structures of revolution is presented.The axisymmetric deformation model is described using the cylindrical coordinate system.Large displacement effects and material nonlinearities and anisotropy are accommodated by the formulation.Mathematical derivation of the formulation is given,and an example is presented to demonstrate the capabilities and efficiency of the technique compared to the full three-dimensional model.
