Theory and calculation of resonances and autoionization of two-electron atoms and ionsTechniques for calculating the electron scattering from one-electron hydrogen-like targets on the basis of the Feshback formalism, are discussed. The principal similarities between resonance parameters in the Feshbach formalism and the corresponding Breit-Wigner quantities, are described in detail. Special attention is devoted to a description of the Fano line shape parameter q, and a technique for formulating it in terms of a projector operator is proposed. The theoretical methods are illustrated by numerical calculations for 1S, 3P, and 1D states of H(-) below the first excited threshold of the target atom. Calculations of 1,3S 1,3P, 1,3D states for He are also presented.
Document ID
19860041729
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Temkin, A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Bhatia, A. K. (NASA Goddard Space Flight Center Greenbelt, MD, United States)