Isotopic and temperature effects on the photoemission and predissociation rates of N2+ (C2Σu+)

Radiative and nonradiative decay rates of the C-2 Sigma(+)(u) electronic state of N-2(+) are calculated as a function of the temperature. This makes it possible to study the effect of the temperature on the photoemission spectrum and on the ion yields I(N+) and I(N-2(+)). It is shown that the temperature has different effects on the isotopes N-28(2)+, N-29(2)+, and N-30(2)+. Our results confirm that, regardless of the temperature, predissociation is the dominant relaxation mechanism for vibrational states.nu ' >= 3 of the N-28(2)+ and N-29(2)+ molecules.