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Phys. Rev. A 59, 3655 - 3659 (1999)

Observation of resonance structure in the Na- photodetachment cross section

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Gunnar Haeffler, Igor Yu. Kiyan *, Dag Hanstorp, and Benjamin J. Davies †
Department of Physics, Chalmers University of Technology and Göteborg University, SE-412 96 Göteborg, Sweden

David J. Pegg
Department of Physics, University of Tennessee, Knoxville, Tennessee 37996

Received 16 November 1998

We have used a collinear laser-ion beam apparatus to investigate the partial cross section for the photodetachment of Na- via the Na(4s)+e-(εp) channel. The measured cross-section spectrum is compared to a recent R-matrix calculation [C.-N. Liu and A. F. Starace, preceding paper, Phys. Rev. A 59, 3643 (1999)]. The photodetachment cross section was measured in the energy range 4.657–4.880 eV. In this spectrum, we have identified four resonances that converge on the Na(4d) threshold. The energies and widths of the resonances were determined from the measured cross section. A semiempirical formula has also been used to predict the positions of the four resonances and to show that, in a semiclassical model, the resonances belong to the same 1Po series.


©1999 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.59.3655
DOI: 10.1103/PhysRevA.59.3655
PACS: 32.80.Gc, 32.80.Fb, 31.50.+w

* Permanent address: General Physics Institute, Russian Academy of Sciences, Vavilova St. 38, 117942 Moscow, Russia.
† Permanent address: Physics Department, Kalamazoo College, Kalamazoo, MI 49006-3295.

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