Activation techniques have been used to measure the total cross section for the production of ${}^7$Be, ${}^{22}$Na, and ${}^{24}$Na in proton induced reactions on ${}^7$Li and ${}^{27}$Al targets at bombarding energies of 495 MeV and 795 MeV. The cross section for the ${}^7$Li${\mathrm{}(p,n)\mathrm{}}^7$Be(g.s.+0.43-MeV) reaction at 795 MeV is about 11–15 % larger than extrapolations based on previous data below 480 MeV.

• Received 11 September 1996

DOI:https://doi.org/10.1103/PhysRevC.55.1551