Document Type
Article
Department/Program
Physics
Journal Title
Physical Review A
Pub Date
10-2000
Publisher
American Physical Society
Volume
62
Issue
4
Abstract
We present data on the photoabsorption spectrum of lithium atoms in an electric field at energies between the saddle point of the Stark potential and below the field-free ionization threshold. The spectrum displays a sequence of sharp resonances and a sequence of broad ones. We find that the broad resonances arise from the classically forbidden reflection of waves above a dynamical potential barrier. The recurrence spectrum is also observed and it is dramatically affected by above-barrier reflections. We have developed a semiclassical theory that interprets the spectra using quasiclassical trajectories that undergo above-barrier reflection.
Recommended Citation
Kondratovich, V.; Delos, John B.; Spellmeyer, Neal; and Kleppner, Daniel, Classically Forbidden Recurrences in the Photoabsorption Spectrum of Lithium (2000). Physical Review A, 62(4).
https://doi.org/10.1103/PhysRevA.62.043409
DOI
https://doi.org/10.1103/PhysRevA.62.043409
