T. Tanabe et al., SEARCH FOR H2- RESONANCES IN THE DETACHMENT OF H- BY ELECTRON-IMPACT WITH A HIGH-RESOLUTION COOLER RING, Physical review. A, 54(5), 1996, pp. 4069-4072
Electron-impact detachment of H- 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 H2- resonances that were reported earlier
. No evidence was found for the existence of these resonance states.