We report differential cross section measurements for the stretched transition from the ${}^{10}\mathrm{B}$ ground state ($J^{\pi }=3^{+}$) to the ${}^{10}\mathrm{Be}$ ground state ($J^{\pi }=0^{+}$) in the ${}^{10}\mathrm{B}$($n,p$)${}^{10}\mathrm{Be}$ (g.s.) reaction. These data were obtained over the energy range from 70 to 240 MeV, covering momentum transfer values from 0.6 to 2.5 fm${}^{-1}$. In this momentum transfer range, the isovector tensor effective interaction dominates the transition. Cross sections are compared to zero- and finite-range distorted wave impulse approximation calculations using modern free and density-dependent effective interactions and a transition density consistent with ($e,e^{\text{'}}$) data. Good agreement is observed at energies above 120 MeV, but below this energy the cross sections are larger than the calculated values by more than 40%. The implications for DWIA calculations are discussed.

• Received 14 November 2006

DOI:https://doi.org/10.1103/PhysRevC.75.034611