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Electron Capture from Coherent Elliptic Rydberg Atoms

Thomas Ehrenreich, Brett D DePaola, Lars Michael Kristensen, T Bové, Erik Horsdal-Pedersen, P. Sørensen

Published May 1, 1998• 0 citations
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Electron capture from oriented elliptic Rydberg atoms

Thomas Ehrenreich, J. C. Day, Søren B. Hansen +3 more

Electron capture cross sections for coherent elliptic Rydberg states have been measured as a function of eccentricity. The ion impact velocity was parallel to the minor axis of the associated, classical elliptic orbit and both clockwise and anticlockwise orbital motion of the electron were studied. The incoming ions were 2.5 keV 23 Na + and the Rydberg target, with principal quantum number n=25, was formed by laser excitation of Li atoms with subsequent adiabatic switching of crossed, external electric and magnetic fields. A strong dependence on eccentricity and sense of orbital motion was found.

Journal of Physics B Atomic Molecular and Optical Physics•Jul 28, 1994•37 citations

Control of autoionization widths: Doubly excited coherent elliptic states

Daniel Janby, Lars Bojer Madsen, Valentin N. Ostrovsky

Doubly excited coherent elliptic states (DECESs) of an atom could be produced by exciting an atomic electron to a Rydberg state, applying the adiabatic field-switching technique to obtain a coherent elliptic state (CES) and by subsequent excitation of an atomic core electron into a low-lying excited state. The DECESs decay by autoionization and radiative transitions. As an example, the autoionization widths are calculated for DECESs in He. The dependence of the widths on the eccentricity of the CES, principal quantum number of the Rydberg electron, orientation of the inner electron orbital and electron exchange is studied and interpreted.

Physical Review A•Jun 8, 2006•3 citations

Toward Creating a Rutherford Atom

David M. Villeneuve

Rydberg atoms are atoms with a highly excited electron. In his Perspective, Villeneuve explains that by creating a coherent superposition of Rydberg states, the electron can be made to behave almost like a classical Rutherford atom. He highlights the report by Maeda et al., who show that they can force the electron wave packet to remain localized for thousands of highly elliptical orbits around the nucleus, much like a miniature planetary system. Such experiments help to bridge the gap between the quantum mechanical world and our everyday classical world.

Science•Mar 18, 2005•1 citation
Electron capture cross sections for coherent elliptic Rydberg states have been measured as a function of eccentricity. The ion impact velocity was parallel to the minor axis of the associated, classical elliptic orbit and both clockwise and anticlockwise orbital motion of the electron were studied. The incoming ions were 2.5 keV 23 Na + and the Rydberg target, with principal quantum number n=25, was formed by laser excitation of Li atoms with subsequent adiabatic switching of crossed, external electric and magnetic fields. A strong dependence on eccentricity and sense of orbital motion was found.
Doubly excited coherent elliptic states (DECESs) of an atom could be produced by exciting an atomic electron to a Rydberg state, applying the adiabatic field-switching technique to obtain a coherent elliptic state (CES) and by subsequent excitation of an atomic core electron into a low-lying excited state. The DECESs decay by autoionization and radiative transitions. As an example, the autoionization widths are calculated for DECESs in He. The dependence of the widths on the eccentricity of the CES, principal quantum number of the Rydberg electron, orientation of the inner electron orbital and electron exchange is studied and interpreted.
Rydberg atoms are atoms with a highly excited electron. In his Perspective, Villeneuve explains that by creating a coherent superposition of Rydberg states, the electron can be made to behave almost like a classical Rutherford atom. He highlights the report by Maeda et al., who show that they can force the electron wave packet to remain localized for thousands of highly elliptical orbits around the nucleus, much like a miniature planetary system. Such experiments help to bridge the gap between the quantum mechanical world and our everyday classical world.