Time-dependent Approach to Positron - Hydrogen Scattering
نویسندگان
چکیده
منابع مشابه
The Time - Dependent Approach to Inverse Scattering ∗
In these lectures I give an introduction to the time-dependent approach to inverse scattering, that has been developed recently. The aim of this approach is to solve various inverse scattering problems with time-dependent methods that closely follow the physical (and geometrical) intuition of the scattering phenomena. This method has been applied to many linear and nonlinear scattering problems...
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A problem to account for the direct electron-positron annihilation in positron-hydrogen scattering above the positronium formation threshold has been resolved within the time independent formalism. The generalization of the optical theorem is derived for the case when an absorption potential is present in the Hamiltonian. With this theorem the annihilation cross section is fully determined by s...
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Positronium-formation cross sections from positron-hydrogen collisions are calculated by solving a set of close-coupled, time-dependent partial differential equations. These cross sections are determined by propagating a time-evolving wave packet on a two-dimensional radial lattice and then projecting the wave function onto the stationary states of the atom. Calculations are performed through L...
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the aim of this study has been to find answers for the following questions: 1. what is the effect of immediate correction on students pronunciation errors? 2. what would be the effect of teaching the more rgular patterns of english pronunciation? 3. is there any significant difference between the two methods of dealing with pronuciation errore, i. e., correction and the teaching of the regular ...
15 صفحه اولTotal ionization cross section for electron-hydrogen scattering using a time-dependent close-coupling method.
A time-dependent close-coupling method is combined with a time-independent distorted-wave method to calculate the electron ionization cross section for hydrogen. A second-order differencing of the time propagator for the close-coupled equations is found to be very efficient. Low partial-wave close-coupling results are added to high partial-wave distorted-wave results to yield total ionization c...
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ژورنال
عنوان ژورنال: Australian Journal of Physics
سال: 1999
ISSN: 0004-9506
DOI: 10.1071/ph98101