Application of the Direct-Semidirect Model to the Interpretation ofE1andE2Strength inC14(ppol, γ0)N15

Abstract

Direct-semidirect radiative-capture calculations are compared to new detailed ${}_{}{}^{14}{}_{}{}^{}\mathrm{C}(p_{\mathrm{pol}}, {\gamma }_0){}_{}{}^{15}{}_{}{}^{}\mathrm{N}$ measurements in the giant-dipole-resonance region. The calculations provide a good description of the data by including only direct $E2\mathrm{}$ and direct plus collective $E1\mathrm{}$. The experimentally determined $E2\mathrm{}$ cross section exhausts (6.8±1.4)% of the isoscalar sum rule and shows no sign of a resonance.