Time-Dependent Close-Coupling Calculations of Dielectronic Capture in He

MITNIK, D. M.; GRIFFIN, D. C.; PINDZOLA, M. S.

PHYSICAL REVIEW LETTERS

AIP, The American Physical Society

Año: 2002 vol. 88 p. 173004 - 173008

0031-9007

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.