Cross sections and angular distributions for the 10B(e,p) and 10B(e,d) reactions in the giant resonance region

The cross sections and angular distributions of (γ,p) and (γ,d) reactions on 10B have been measured in the giant resonance region by the (e,p) and (e,d) reactions applying the virtual photon theory. The E2 cross section of the (γ,p0) reaction derived by a model dependent analysis of the angular distributions shows contributions of 26.5 ± 4.5% to the E2 energy weighted sum rule. The (γ,p0,2) integrated cross section up to 27 MeV is 6.1 ± 0.2% of the E1 sum rule value which is smaller than 30% for 10B(γ,n). This suggests that the (γ,p) reaction leaves high-lying residual states as the prediction of the shell model calculation. The E2 strength deduced from the 10B(γ,d0) reaction is 0.14 ± 0.05% of the E2 energy weighted sum rule, which is one order of magnitude smaller than the case of neighboring odd-odd nuclei; 6Li and 14N. This may be suppressed by a competition with (γ,d1). (author)