Observation of1+state inCa48by hadron inelastic scattering

The 10.2 MeV state in ${}_{}{}^{48}{}_{}{}^{}\mathrm{Ca}$ has been confirmed to be $J^{\pi }=1^{+}$ by ($p$,$p^{\prime }$) and ($\alpha$, ${\alpha }^{\prime }$) experiments. The state was strongly excited by the ($p$,$p^{\prime }$) reaction at $E_p=65\mathrm{}$ MeV. Differential cross sections of the state are compared with a microscopic distorted-wave Born approximation calculation based on a shell model. The calculation overestimates the cross sections by a factor of 4.