Intermediate-energy Coulomb excitation of ${}^{32}\mathrm{Mg}$ using in-beam $\gamma$-ray spectroscopy with a relatively thick lead target was studied at a beam energy of 195 MeV/nucleon at the RIKEN Radioactive Isotope Beam Factory (RIBF). The angular distribution of the inelastic scattering was analyzed with distorted-wave calculations taking into account both the Coulomb and the nuclear excitation contributions. A $B\left(E2\right)$ value of 432(51) $e^2{\mathrm{fm}}^4$ was extracted, which agrees with most of the previously reported results obtained at several tens of MeV/nucleon. Our investigation demonstrates that the electromagnetic properties of exotic nuclei can be studied with Coulomb excitation at beam energies of a few hundreds of MeV/nucleon, where a thicker target can be used to increase the excitation yields.

• Received 4 November 2014
• Revised 3 June 2015

DOI:https://doi.org/10.1103/PhysRevC.92.014608