Abstract
We report on the first experimental observation of a new threshold behavior observed in the partial channel in photodetachment of . It arises from the repulsive polarization interaction between the detached electron and the residual atom, which has a large negative dipole polarizability. In order to account for the observation in the channel, we have developed a semiclassical model that predicts an exponential energy dependence for the cross section. The measurements were made with collinear laser-ion beams and a resonance ionization detection scheme.
- Received 20 July 2011
DOI:https://doi.org/10.1103/PhysRevLett.108.033004
© 2012 American Physical Society