The fusion cross section of the ${}_{}{}^{10}{}_{}{}^{}\mathrm{B}$ + ${}_{}{}^{14}{}_{}{}^{}\mathrm{N}$ system has been measured at five energies covering the range ${E_{14}}_{\mathrm{N}}=86-180\mathrm{}$ MeV. Angular distributions of fusion and direct reaction components for products from $Z=3\mathrm{}$ to $Z=11\mathrm{}$ have been determined. Hauser-Feshbach calculations of the $Z$ distributions, energies and angular distributions of the evaporation residues are presented and compared to the data. The fusion cross section decreases slowly with increasing energy and reaches a maximum angular momentum of about $21\pm 1\hslash$. The fusion cross section is discussed in terms of entrance channel models and compound nucleus formation and is compared to that of the ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ + ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ system. The experimental total reaction cross sections are in good agreement with optical model calculations with parameters deduced from elastic scattering.

NUCLEAR REACTIONS ${}_{}{}^{14}{}_{}{}^{}\mathrm{N}$ + ${}_{}{}^{10}{}_{}{}^{}\mathrm{B}$, ${E_{14}}_{\mathrm{N}}=86\mathrm{} \mathrm{to} 180$ MeV, measured $\frac{d^2\sigma }{d\Omega \mathrm{dE}}$ for reaction products from $Z=3\mathrm{} \mathrm{to} 11$. Extracted ${\sigma }_{\mathrm{fusion}}$, ${\sigma }_{\mathrm{direct}}$, and ${\sigma }_{\mathrm{total}}$.

• Received 5 October 1981

DOI:https://doi.org/10.1103/PhysRevC.25.1436