Space and time correlation in high velocity multiple electron transitions [electronic resource].
- Washington, D.C. : United States. Dept. of Energy, 1990. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- 10 pages : digital, PDF file
- Additional Creators:
- United States. Department of Energy and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- In collisions of high velocity projectiles of charge Z and velocity v, perturbations expansions in Z/v usually converge when Z/v<l. Under these conditions Z³ contributions to cross sections for two electron transitions (e.g. double excitation) may arise if there is interference between first order and second order contributions to the probability amplitude. Non-zero Z³ terms in two electron excitation or ionization cross sections occur if spatial electron correlation is present. For double excitation non-zero Z³ contributions require a correlation in time as well. This time correlation corresponds to quantum time ordering arising from virtual off-energy-shell intermediate states. As with second order amplitudes for Thomas singularities in single electron capture, the energy non-conserving amplitude is connected to the energy-conserving amplitude in second order in Z by a dispersion relation. Generalization to higher order transitions (e.g. triple excitation) is discussed.
- Published through SciTech Connect., 12/31/1990., "conf-901116--44", "DE93006814", 11. international conference on the applications of accelerators in research and industry,Denton, TX (United States),5-8 Nov 1990., McGuire, J.H.; Straton, J.C., and Kansas State Univ., Manhattan, KS (United States). J.R. MacDonald Lab.
- Funding Information:
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