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The first Born approximation and absolute scattering cross sections
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry, Quantum Chemistry.
1996 (English)In: Journal of Physics B: Atomic, Molecular and Optical Physics, ISSN 0953-4075, E-ISSN 1361-6455, Vol. 29, no 1, 97-113 p.Article in journal (Refereed) Published
Abstract [en]

The problem of bringing experimental electron-scattering cross sections to the absolute scale using the so-called Lassettre theorem is addressed. Experimental data that have been measured by electron-scattering experiments for different incident energies (in the range of 100 to 600 eV) and have been normalized on the basis of this theorem are compared with absolute cross sections that have been calculated within the first Born approximation by means of the complex-scaling method. The agreement is not found to be satisfactory even for the smallest values of momentum transfer. This, however, is a contradiction to Lassettre's theorem. A new normalization procedure for the experimental data is suggested that has yielded good agreement between the present calculated and the measured data even for a comparatively large range of momentum transfer. This indicates an extended range of validity of the first Born approximation.

Place, publisher, year, edition, pages
1996. Vol. 29, no 1, 97-113 p.
Keyword [en]
COMPLEX-COORDINATE METHOD, NONRELATIVISTIC COMPTON-SCATTERING, OSCILLATOR-STRENGTHS, ELECTRON-IMPACT, FURRYS PICTURE, BETHE SURFACE, HELIUM, IONIZATION, HE, IMPLEMENTATION
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:uu:diva-41951DOI: 10.1088/0953-4075/29/1/014OAI: oai:DiVA.org:uu-41951DiVA: diva2:69852
Note
UNIV KONSTANZ, FAK CHEM, D-78434 CONSTANCE, GERMANY. UNIV UPPSALA, DEPT QUANTUM CHEM, S-75120 UPPSALA, SWEDEN.Available from: 2007-02-14 Created: 2007-02-14 Last updated: 2017-12-05Bibliographically approved

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Froelich, Piotr

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