Study of Strong Spin-Isospin Mode Analog States at 4.5 MeV inB12inC12(e, e′π+)B12

Strong spin-isospin mode, $T=1\mathrm{}$, $T_z=1\mathrm{}$ analog states at 4.5 MeV in ${}_{}{}^{12}{}_{}{}^{}\mathrm{B}$ were studied by the reaction ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}(e, e^{\prime }{\pi }^{+}){}_{}{}^{12}{}_{}{}^{}\mathrm{B}$ at the electron energy $E_e=200\mathrm{}$ MeV. The photoproduction cross sections at seven angles ranging from 30° to 150° were obtained with use of virtualphoton theory and an experimentally determined real-to-virtual photon ratio. The results are compared with theoretical calculations and also with the available data on inelastic scattering from the 19.5-MeV $T=1\mathrm{}$, $T_z=0\mathrm{}$ analog complex in ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$.