Photoionization Efficiency (PIE) Curves and Appearance Energies (AE) which are matched to calculated ionization energies as described in a subsequent section. In this work, the AE is defined as the amount of energy needed to ionize and potentially fragment the gas phase molecule or cluster. The AE value is determined via visual identification of the first major rise of the PIE curve above the baseline, as has been done previously. These AE's are reported in detail in table with most AE's in the 10.5 eV range. The PIE's for fragments with masses below that of FA are reported in the SI in figure , however, their appearance energies are reported in table 1 for completeness.