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Time-dependent close-coupling calculations of dielectronic capture in He
D M Mitnik1, D C Griffin, M S Pindzola
1Department of Physics, Rollins College, Winter Park, Florida 32789, USA.
Abstract:
We report on the first time-dependent close-coupling calculation of dielectronic capture into a doubly excited state of a two-electron atom. An incoming electron is represented by a Gaussian wave packet which collides with singly ionized helium in its ground state. The close-coupling equations describe the propagation of the total compound wave function on a two-dimensional radial lattice. By projecting this wave function onto a doubly excited state of neutral helium, we can determine the probability amplitude for dielectronic capture into one of these states and the subsequent autoionization from it.
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