0+ to 0- transition in the 16O(p,n) 16F reaction at 79 MeV

The isovector 0${}^{+}$ to 0${}^{\ensuremath{-}}$ transition in the ${}^{16}$O${(p,n)}^{16}$F (g.s.) reaction was studied at 79 MeV. Differential cross sections were extracted for the transitions to the low-lying complex of 0${}^{\ensuremath{-}}$, 1${}^{\ensuremath{-}}$, 2${}^{\ensuremath{-}}$, and 3${}^{\ensuremath{-}}$ states in ${}^{16}$F at 12 laboratory angles from 0.3$\ifmmode^\circ\else\textdegree\fi{}$ to 63$\ifmmode^\circ\else\textdegree\fi{}$ which correspond to momentum transfers from 0.21 to 2.0 fm${}^{\ensuremath{-}1}$. An energy resolution of 140 keV (FWHM) was achieved which was sufficient to separate the yields for each of these four states. Distorted-wave-impulse-approximation (DWIA) calculations were performed and compared with the extracted cross sections for these four transitions. The DWIA calculations with the effective interaction of Franey and Love provide a good description of the experimental measurements for the 0${}^{\ensuremath{-}}$ transition at low momentum transfer, but overestimate the data at larger momentum transfer. The experimental results for the 1${}^{\ensuremath{-}}$, 2${}^{\ensuremath{-}}$, and 3${}^{\ensuremath{-}}$ transitions are described reasonably well by the DWIA calculations.