States of 13N in the 20-30 MeV region

Proton transitions to the ground, 4.43, 7.66 and 9.64 MeV states of 12C arising from the 10B(3He, p) reaction have been investigated at bombarding energies between 1.2 and 12 MeV. Excitation functions for the four particle groups were taken at 150°. Angular distributions of the p0 and p1 groups were measured at twelve energies and total cross sections were obtained. In addition angular distributions were obtained for the p2 and p3 groups at a bombarding energy of 5 4 MeV. The experiment provides evidence for excited states of 13N at energies of 22, 24.5, 26 and 28 MeV.