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Full-Text Articles in Physics
Electron Detachment In Negative-Ion Collisions. Iii. Model Calculations., T. S. Wang, John B. Delos
Electron Detachment In Negative-Ion Collisions. Iii. Model Calculations., T. S. Wang, John B. Delos
Arts & Sciences Articles
With the use of a previously developed close-coupling theory, and simple models for the energy gap and propagator that arise in that theory, calculations are made of the properties of the survival probability for the negative ions and of the energy spectrum of detached electrons. Special attention is given to interference effects that might be seen under favorable circumstances.
Bound State Semiclassical Wave Functions, Stephen Knudson, John B. Delos, D. W. Noid
Bound State Semiclassical Wave Functions, Stephen Knudson, John B. Delos, D. W. Noid
Arts & Sciences Articles
The semiclassical theory developed by Maslov and Fedoriuk is used to calculate the wave function for a two‐dimensional bound state system. We investigate in detail an eigenstate of a coupled anharmonic oscillator system. The primitive semiclassical wave function is obtained from the characteristic function S and the density function J. Each of these functions consists of four branches corresponding to the four possible directions of motion of the classical trajectory through any point. The interference from the four branches determines the basic structure of the wave function. A uniform approximation gives a wave function which is well behaved along …
Probability Conservation In Theories Of Collisional Ionization And Detachment, M. L. Du, John B. Delos
Probability Conservation In Theories Of Collisional Ionization And Detachment, M. L. Du, John B. Delos
Arts & Sciences Articles
The semiclassical local-complex-potential theory has been widely used to describe detachment and ionization in atom-atom and ion-atom collisions. However, it has been shown that the resulting formulas do not conserve probability. In this paper, we show that the problem arises from the inconsistent treatment of the effects of interference, tunneling, and diffraction. A more complete theory is based upon the close-coupling expansion, which leads to an infinite set of coupled equations. A method for solving such sets of equations was developed in earlier work. Here we implement that method using a new iterative numerical scheme, and we show that the …