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Quantum manifestations of scattering orbits in the scaled spectrum of a non-hydrogenic atom in crossed fields

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Jianguo Rao1, D Delande2 and K T Taylor1

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LETTER TO THE EDITOR

Evidence for scattering closed orbits for the Rydberg electron of the singly excited helium atom in crossed electric and magnetic fields at constant scaled energy and constant scaled electric field strength has been found through a quantum calculation of the photo-excitation spectrum. A particular 3D scattering orbit in a mixed regular and chaotic region has been investigated and the hydrogenic 3D closed orbits composing it identified. To the best of our knowledge, this letter reports the first quantum calculation of the scaled spectrum of a non-hydrogenic atom in crossed fields.


PACS

32.80.-t Photoionization and excitation

34.50.Fa Electronic excitation and ionization of atoms (including beam-foil excitation and ionization)

32.30.-r Atomic spectra

31.15.-p Calculations and mathematical techniques in atomic and molecular physics

Subjects

Atomic and molecular physics

Computational physics

Dates

Issue 1 (14 January 2002)

Received 10 July 2001, in final form 19 November 2001

Published 19 December 2001



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