Differential cross sections have been measured at a proton bombarding energy of 39.8 MeV for ${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}(p, t)$ transitions to the $0_1^{+}$, $2_1^{+}$, and $4_1^{+}$ states of ${}_{}{}^{18}{}_{}{}^{}\mathrm{Ne}$ at 0.0, 1.89, and 3.38 MeV, respectively, and to the ($0_2^{+}$, $2_2^{+}$) doublet in ${}_{}{}^{18}{}_{}{}^{}\mathrm{Ne}$ at (3.58, 3.62) MeV. These cross sections are compared with zero-range coupled-channel Born-approximation calculations in which the coexistence-model wave functions of Benson and Flowers have been used. The inclusion of inelastic effects improves the agreement between experiment and theory; however, the calculated ($p, t$) cross sections are quite sensitive to the nature of the inelastic processes in the $t$+${}_{}{}^{18}{}_{}{}^{}\mathrm{Ne}$ channel, and, until these processes are better understood, it is not possible for the calculation to provide a sensitive test of the mass-18 nuclear wave functions used.

NUCLEAR REACTIONS ${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}(p, t)$, $E=39.8\mathrm{}$ MeV; measured $\sigma \left(\theta \right)$ and calculated $\sigma \left(\theta \right)$ with CCBA and DWBA.

• Received 5 December 1974

DOI:https://doi.org/10.1103/PhysRevC.11.1557