Differential cross-section and analyzing-power angular distributions have been measured for the elastic scattering of 159.4 MeV protons on ${}_{}{}^{14}{}_{}{}^{}\mathrm{N}$ and for the inelastic transitions to the 2.31-MeV and 3.95-MeV states. Elastic-scattering data for $\overrightarrow{\mathrm{p}}$+${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ and inelastic data for the ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}(\overrightarrow{\mathrm{p}}, {\mathrm{p}}^{\prime }){}_{}{}^{12}{}_{}{}^{}\mathrm{C}\left(4.44\mathrm{} \mathrm{MeV}\right)$ reaction have also been obtained at the same energy as a normalization check. The ${}_{}{}^{14}{}_{}{}^{}\mathrm{N}(\overrightarrow{\mathrm{p}}, {\mathrm{p}}^{\prime }){}_{}{}^{14}{}_{}{}^{}\mathrm{N}\left(2.31\mathrm{} \mathrm{MeV}\right)$ transition has been analyzed in the distorted-wave impulse approximation. This transition has long been regarded as a favorable test for the tensor component of the effective nucleon-nucleon interaction. Calculations employing wave functions that provide the necessary cancellation of the $L=0\mathrm{}$ central-interaction transition strength do not provide a good description of the differential cross-section angular distribution. It is suggested that more complicated reaction mechanisms, e.g., (p,d)(d,p′) contributions, may be needed to describe this transition.

NUCLEAR REACTIONS ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}(\overrightarrow{\mathrm{p}}, \mathrm{p})$, ($\overrightarrow{\mathrm{p}}, {\mathrm{p}}^{\prime }$), $E_x=4.44\mathrm{}$ MeV; ${}_{}{}^{14}{}_{}{}^{}\mathrm{N}(\overrightarrow{\mathrm{p}}, \mathrm{p})$, ($\overrightarrow{\mathrm{p}}, {\mathrm{p}}^{\prime }$), $E_x=2.31, 3.95$ MeV; $E_{\mathrm{p}}=159.4\mathrm{}$ MeV. Measured $\sigma \left(\theta \right)$, $A_y\left(\theta \right)$, ${\theta }_{\mathrm{lab}}=7.5\mathrm{}°-45\mathrm{}°$. DWIA analysis of 2.31-MeV transition.

• Received 25 February 1983

DOI:https://doi.org/10.1103/PhysRevC.28.969