New measurement scheme to investigate low energy charge transfer in H $+$ H$_{2}^{+}$

The merged-beam apparatus at Oak Ridge National Laboratory (ORNL) in Oak Ridge, Tennessee, can reliably access low energy charge transfer in H $+$ H$_{2}^+ \to $ H$^{+} + $ H$_{2}$ and is able to benchmark the total cross section at 200 to under 0.1 eV/u, but is not equipped with a device that would provide the ro-vibrational state distribution of the primary molecular ions. A new experimental scheme, which will allow to upgrade the heretofore only total absolute cross section measurements to vibrationally resolved cross section measurements and will make comparison to state-to-state calculations (PRA \textbf{67} 022708 (2003) possible, will be presented.