(See the Isobar Diagram for 18N)
Mass of 18N: The mass excesses of 18N derived from the 14C(18O, 14N)18N and 18O(t, 3He)18N reactions are 13.217 ± 0.040 and 13.274 ± 0.030 MeV: the weighted mean is 13.254 ± 0.024 MeV. However (1982OL01) suggest, on the basis of theoretical considerations, that the first three excited states of 18N may lie within 150 keV of the ground state, and that the resolution of the above experiments was such that the ground state may not have been the state primarily populated: we therefore adopt 13.25 ± 0.10 MeV.
The 18N mass excess is reported to be 13.29 ± 0.06 MeV. There is some suggestion of excited states at Ex = 0.53 ± 0.06 and 0.83 ± 0.06 MeV (1980KRZX; prelim.).
At E(18O) = 92.2 MeV two groups are observed with differential cross sections of 16.5 and 3.3 μb/sr at θc.m. ≈ 6°, corresponding to the ground state of 18N (see "Mass of 18N" above) and to an excited state at Ex = 575 ± 25 keV (1980NA14).