Photoionization mass spectrometry of kinetic energy-selected ions. The translational energy distribution of N+ /N2 in the inner-shell ionization energy range

Abstract

An ion retarding potential difference (IRPD) method has been used to investigate the ion yield and kinetic energy distributions of N + /N 2 produced by photoionization mass spectrometry using synchrotron radiation. Photoion yield curves of energy selected N + ions are deduced. Translational energy distributions of N + at energies of the N(1s)→π*, N(1s)→ (nl) 1 and above the N(1s) -1 threshold are determined. Comparison is made with previous photoion-photoelectron coincidence work using time-of-flight (TOF) measurements.