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Phys. Rev. Lett. 85, 4028 - 4031 (2000)

High-Resolution Vacuum-Ultraviolet Spectroscopy of an Electron-Cooled D- Beam

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M. K. Raarup, U. V. Pedersen *, V. V. Petrunin †, P. Balling, and T. Andersen
Institute of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark

Received 23 May 2000

The shape parameters for the lowest-lying 1Po resonance, 2{0}3-, of D- have been measured using high-resolution vacuum-ultraviolet spectroscopy. The experiment was performed at the storage ring ASTRID, and the resonance was resolved by applying electron cooling to reduce the velocity spread of the ion beam. The resonance has a width of 37(3) μeV while the asymmetry parameter q of the Fano profile is -16(3). These values present the first critical test of a large number of theoretical calculations.


©2000 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.85.4028
DOI: 10.1103/PhysRevLett.85.4028
PACS: 32.80.Gc, 39.30.+w

* Present address: Institute for Storage Ring Facilities, University of Aarhus, DK-8000 Aarhus C, Denmark.
† Present address: Institute for Physics, University of Odense, DK-5230 Odense M, Denmark.

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