Radiative capture of tritons by 14N and 17O levels above 19 MeV

Cross sections for the radiative capture of tritons by 14N have been measured in the incident energy range 0.8 to 3.3 MeV and found to be of order 200 --300 nb/sr. The 900 excitation functions exhibit resonant structures for the transitions to the 5/2+ ground state of 17O and the 1/2+ (0.87-MeV) first excited state. Multilevel S-matrix fits of both excitation functions and angular distributions, on the assumption that dipole transitions dominate, permit J/sup π/ assignments for the observed resonances to be limited to a very few possibilities; the best fit results, which are also most consistent with other relevant arguments, give the most likely assignments 3/2-, 5/2-, 1/2+, and 3/2- for states at 19.76, 20.39, 20.58, and 21.05 MeV, respectively, although the parities cannot be individually ascertained. The lower limit for the radiative widths GAMMA/sub γ/ ranges from 1 to 6 eV. An additional level also appears to be present at approx. 19.3 MeV