Calculation of C-13(p, gamma)N-14 and N-14(gamma, p)C-13 cross sections

The radiative proton capture C-13(p,gamma)N-14 and the inverse N-14(gamma,p )C-13 reactions show unusually narrow and strong resonance peaks at E-p = 1 .7476 MeV and E-gamma = 9.172 MeV, respectively. In the present work, calcu lations of the cross sections for the C-13(p,gamma)N-14 and the N-14(gamma, p)C-13 reactions are performed using both the Breit-Wigner single-resonance formula and the radiative direct-capture model. The result calculated usin g the direct-capture reaction theory implies that the strong resonance peak in the cross section for the reaction C-13(p,gamma)N-14 at E-p = 1.7476 Me V is due to the capture of particles having a d(3/2) wave by the C-13 core nucleus.