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DOI 10.1140/epja/i2007-10432-4 Regular Article Nuclear Structure and Reactions
 

Summary: DOI 10.1140/epja/i2007-10432-4
Regular Article ­ Nuclear Structure and Reactions
Eur. Phys. J. A (2007)
THE EUROPEAN
PHYSICAL JOURNAL A
Focusing of high-energy particles in the electrostatic field of a
homogeneously charged sphere and the effective momentum
approximation
A. Astea
and D. Trautmann
Department of Physics and Astronomy, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland
Received: 8 May 2007 / Revised: 4 July 2007
Published online: 31 July 2007 ­ c Societ`a Italiana di Fisica / Springer-Verlag 2007
Communicated by V. Vento
Abstract. The impact of the strongly attractive electromagnetic field of heavy nuclei on electrons in quasi-
elastic (e, e ) scattering is often accounted for by the effective momentum approximation. This method
is a plane wave Born approximation which takes the twofold effect of the attractive nucleus on initial-
and final-state electrons into account, namely the modification of the electron momentum in the vicinity
of the nucleus, and the focusing of electrons towards the nuclear region leading to an enhancement of
the corresponding wave function amplitudes. The focusing effect due to the attractive Coulomb field of a

  

Source: Aste, Andreas - Institut für Physik, Universität Basel

 

Collections: Physics