The first measurements of ${\mathit{D}}_{\mathit{NN}}$(0°) for (p→,n→) reactions at 295 MeV yield large negative values up to 50 MeV excitation for the ${}_{}{}^6{}_{}{}^{}\mathrm{Li}$${,}^{11}$B${,}^{12}$C, ${}_{}{}^{13}{}_{}{}^{}\mathrm{C}$(p→,n→) reactions, suggesting much stronger spin-flip strength than observed at lower bombarding energies. DWIA calculations using the Franey and Love (FL) 270 MeV interaction reproduce differential cross sections and ${\mathit{D}}_{\mathit{NN}}$(0°) values, while the FL 325 MeV interaction yield ${\mathit{D}}_{\mathit{NN}}$(0°) values less negative than the experimental values, suggesting that its exchange tensor part is too strong at large momentum transfer (Q≃3.4 ${\mathrm{fm}}^{\mathrm{-}1}$).

• Received 8 February 1995

DOI:https://doi.org/10.1103/PhysRevC.51.R2871