Collisions of ground state N+ ions with N-2 were investigated in a Guided Ion Beam (GIB) apparatus at center-of-mass (CM) collision energies up to 10 eV. Isotopic labeling of the target gas, N-15(2), was used as one criterion to distinguish electron transfer, atom transfer, and isotope exchange channels. The absolute cross sections are in good agreement with previous measurements. By combining the GIB technique with time-of-flight analysis (acronym GIB-TOF) more detailed information on the reaction dynamics has been obtained. The product velocity distributions measured for N-15(2)+ and (NN+)-N-14-N-15 indicate that both, electron and atom transfer, have to be divided into at least two parts, a direct one and one which seems to be characteristic for a long lived complex. The branching ratios derived for these four channels show a strong energy dependence. The mean product kinetic energy indicates that the remaining nitrogen atom is most probably formed in the metastable N(D-2) state. For the nearly thermoneutral N-14(+)-N-15(+) isotope exchange it was observed that a significant fraction of the translational energy is transferred into internal excitation of the neutral molecule. (C) 2000 American Institute of Physics. [S0021-9606(00)00616-4].