The angular distribution of photoelectrons ejected from the hydrated electron cluster (H2O)−18

The angular distribution of the photoelectrons ejected from the hydrated electron cluster (H2 O)−18 was measured to determine the spatial character of the orbital in which the excess electron resides. The asymmetry parameter β was determined to be 0.92±0.1, consistent with a roughly spherical orbital, similar to that of the hydrated electron in solution.