Abstract
Two pronounced dips in the photodetachment cross section have been observed at photon energies of 12.650±0.004 and 12.837±0.004 eV, just below the hydrogenic threshold. These energies were reached by crossing a uv laser beam with a relativistic beam. The dips are interpreted as the first two members of a Feshbach resonance series, of the "+" type, converging on . Fano line shapes have been fitted to these structures to extract their intrinsic widths and line profile indices.
- Received 5 September 1979
DOI:https://doi.org/10.1103/PhysRevLett.43.1715
©1979 American Physical Society