Charge exchange at very low collision energies

摘要

Two of simplest collision systems one can study are H~+ + H(1s) and H~+ + D(1s). Electron transfer is resonant in the first and nearly resonant in the latter becasue of the 3.7 meV gap between H(1s) and D(1s). Once the collision velocity becomes small enough quantum effects become more pronounced. However, these very low energies, of a few meV, are inaccessible using standard collision techniques. We hereby suggest a method in which a dissociating HD~+ molecular ion is the "accelerator" used to measure electron transfer in the H~++ D(1s) collision system down to a few meV. when a HD molecule is ionizaed quickly about 1