Abstract
n this article we survey some new theoretical results on double excitation processes of ground state helium by electrons and positively charged particles such as positrons (e+) and carbon nuclei (C6+). Our interest lies in the high energy regime and in geometries for which the ejected electron is very much slower than the incident and scattered charged particle, which in our approximation are represented by plane waves. Under these conditions we may think of the collision as exciting a continuum state ???f of the isolated atom. In the case of excitation-ionization this state consists of the ejected electron, momentum K, moving in the field of an excited He+ ion, for example, the system {He+(2s or 2p) + e-(K)}.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
P. J. Marchalant, C. T. Whelan and H. R. J Walters, Second order effects in (e, 2e) excitation-ionization of helium to He +(n = 2). J. Phys. B, 31: 1141, (1998)
P. J. Marchalant, J. Rasch, C. T. Whelan, D. H. Madison and H. R. J Walters, First and second order calculations of (e, 2e) excitation - ionization of helium. J. Phys. B, 32: L705, (1999)
P. J. Marchalant, C. T. Whelan and H. R. J. Walters, Excitation-ionization and excitation-autoionization of helium, in Coincidence Studies of Electron and Photon Impact ionization, Colm T. Whelan, H. R. J. Walters, eds., Plenum Press, New York, (1997).
P. J. Marchalant, J. Rasch, C. T. Whelan and H. R. J. Walters, New results for double excitation processes helium targets, in New Directions in Atomic Physics, Colm T. Whelan et al, eds., Plenum Press, New York, (1999).
J. Rasch, P. J. Marchalant, C. T. Whelan, D. Madison and H. R. J. Walters,. In this volume.
T. Kinoshita. J. Phys. B, 105: 1490, (1957)
T. Koga. Z. Phys. D, 34: 71, (1995)
R. J. Tweed and J. Langlois,. J. Phys. B, 20: 5213, (1987)
F. W. Bryon and C. J. Joachain, Correlation effects in atoms. I. helium. Phys. Rev, 146: 1, (1966)
A. Crowe and D. G. McDonald Processes other than simple outer shell ionization, in: (e, 2e) and Related Processes, Colm T. Whelan, H. R. J. Walters, A. Lahmam-Bennani, and H. Ehrhardt, eds., Kluwer Academic Publisher, (1993).
J. Lower and E. Weigold, Correlations in the autoionizingregion of He measured by the (e, 2e) technique. J. Phys. B, 23: 2819, (1990)
C. Dupre; A. Lahmam-Benani, A. Duget, F. Mota-Furtado, P. F. Oahony and C. Dal Cappello, (e, 2e) triple differential cross sections for the simultaneous ionization and excitation of helium. J. Phys. B, 25: 259, (1992)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2001 Springer Science+Business Media New York
About this chapter
Cite this chapter
Marchalant, P.J., Whelan, C.T., Rasch, J., Walters, H.R.J., Madison, D.H. (2001). On the Importance of the Second Order Term for Double Excitation Processes of Helium by Charged Particles. In: Berakdar, J., Kirschner, J. (eds) Many-Particle Spectroscopy of Atoms, Molecules, Clusters, and Surfaces. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-1311-7_25
Download citation
DOI: https://doi.org/10.1007/978-1-4615-1311-7_25
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4613-5491-8
Online ISBN: 978-1-4615-1311-7
eBook Packages: Springer Book Archive