Search for H2- resonances in the detachment of H- by electron impact with a high-resolution cooler ring.

Abstract

Electron-impact detachment of ${\mathrm{H}}^{\mathrm{\ensuremath{-}}}$ was studied with the TARN II storage ring (at the Institute for Nuclear Study, University of Tokyo) and the associated high-resolution electron beam. The relative cross sections were measured for the relative energies between electron and ion from 0 to 60 eV in search of the ${\mathrm{H}}^{2\mathrm{\ensuremath{-}}}$ resonances that were reported earlier. No evidence was found for the existence of these resonance states. \textcopyright{} 1996 The American Physical Society.