Energy levels inMg23from theMg25(p,t)Mg23reaction

Angular distributions of the ${}_{}{}^{25}{}_{}{}^{}\mathrm{Mg}(p,t){}_{}{}^{23}{}_{}{}^{}\mathrm{Mg}$ reaction have been measured at 40 MeV bombarding energy. An energy resolution of 10-15 keV permitted the observation of about 40 new levels in ${}_{}{}^{23}{}_{}{}^{}\mathrm{Mg}$ up to 9.72 MeV of excitation. Unambiguous spin and parity assignments of ${5/2}^{+}$ are made to the levels at 0.045(3), 5.662(8), 6.566(8), 6.899(5), 6.982(5), 7.582(6), 7.795(6), and 8.155(6) MeV on the basis of an $L=0\mathrm{}$ admixture in the angular distributions. Values of the orbital angular momentum $L$ transferred to several states have been deduced. Microscopic distorted-wave Born approximation calculations for the transitions to the first eight ${5/2}^{+}$ states have been performed using spectroscopic amplitudes from recent shell model calculations and are compared to the experimental data.