Charge localization—I The ion kinetic energy spectra of ortho‐, meta‐ and para‐phenylenediamine

Abstract The ion kinetic energy spectra of o ‐, m ‐and p ‐phenylendiamine are presented. Decompositions of doubly‐charged ions are given for the three isomers. From the width of the peaks, the energy released is measured and the equivalent intercharge distance is calculated. The results are discussed in terms of possible structures of the various ions. Also, metastable transitions which could give rise to peaks corresponding to energies below that of the mainion beam are listed and the results discussed. Significant differences were observed among the energy spectra of the three isomers.