Van der Donket al. reply

Merged beam measurement of the dissociative recombination of HCN+and HNC+

“…One could imagine correlating this change with the finite energy resolution of the MEIBE apparatus. In previous experiments, we have identified resonant structures, the widths of which indicate that the resolution is of the order of a few meV or less [43][44][45]. We decided to investigate how this would impact upon our data at low energies.…”

Stimulated radiative recombination of and

“…In the MEIBE experiment described here, previous experiments [11,20] have demonstrated that narrow resonances can be resolved using this apparatus. This is surprising if one assumes that the beam should have, as noted above, an energy spread of 0.1 eV.…”

“…While this technique is certainly very successful, it can necessitate extremely long counting times to achieve adequate statistical counting accuracy if small cross sections are being studied in the presence of large backgrounds. In some previous experiments [20,25] counting times as long as 24 h per data point have been used. In these experiments, the total neutral particle flux was detected using surface barrier detectors and the only means available to minimize the background noise contribution was to ensure that the interaction region was maintained under ultra-high vacuum (10 −9 -10 −10 Torr) conditions.…”

Dissociative Recombination With Ion Storage Rings

“…Whereas H 2 + was chosen for the first theory-experiment comparison (44)(45)(46)(47), its isotopomer HD + is preferred in storage ring experiments. The reason is that the replacement of one of the hydrogen atoms by deuterium adds dipole moment to the ion, which guarantees a fast vibrational relaxation by emission of infrared radiation.…”