From detailed spectroscopy of ${}^{110}\mathrm{Cd}$ and ${}^{112}\mathrm{Cd}$ following the ${\beta }^{+}$/electron-capture decay of ${}^{110,112}\mathrm{In}$ and the ${\beta }^{-}$ decay of ${}^{112}\mathrm{Ag}$, very weak decay branches from nonyrast states are observed. The transition rates determined from the measured branching ratios and level lifetimes obtained with the Doppler-shift attenuation method following inelastic neutron scattering reveal collective enhancements that are suggestive of a series of rotational bands. In ${}^{110}\mathrm{Cd}$, a $\gamma$ band built on the shape-coexisting intruder configuration is suggested. For ${}^{112}\mathrm{Cd}$, the $2^{+}$ and $3^{+}$ intruder $\gamma$-band members are suggested, the $0_3^{+}$ band is extended to spin $4^{+}$, and the $0_4^{+}$ band is identified. The results are interpreted using beyond-mean-field calculations employing the symmetry conserving configuration mixing method with the Gogny D1S energy density functional and with the suggestion that the Cd isotopes exhibit multiple shape coexistence.

A systematic study is made of the Cd isotopes ${}^{110\text{−}116}\mathrm{Cd}$ by making use of available experimental data and interacting boson model calculations incorporating both normal vibrational levels and intruder excitations. At the two-phonon level, the calculations appear to reproduce the data reasonably well in ${}^{110\text{−}114}\mathrm{Cd}$, whereas they break down completely for the $0^{+}$ states in ${}^{116}\mathrm{Cd}$. At the three-phonon level, systematic deviations occur across the Cd isotopic chain, revealing the breakdown of vibrational motion in low-spin states. Combined with the failure to reproduce ${}^{116}\mathrm{Cd}$ at the two-phonon level, it is possible that the Cd isotopes may not represent vibrational systems and that the essential physics of their motion has been missing.

The first conclusive evidence of a dipole resonance in ${}^{11}\mathrm{Li}$ having isoscalar character observed from inelastic scattering with a novel solid deuteron target is reported. The experiment was performed at the newly commissioned IRIS facility at TRIUMF. The results show a resonance peak at an excitation energy of $1.03\pm 0.03\mathrm{MeV}$ with a width of $0.51\pm 0.11\mathrm{MeV}$ (FWHM). The angular distribution is consistent with a dipole excitation in the distorted-wave Born approximation framework. The observed resonance energy together with shell model calculations show the first signature that the monopole tensor interaction is important in ${}^{11}\mathrm{Li}$. The first ab initio calculations in the coupled cluster framework are also presented.

The s-wave neutron fraction of the 0+ levels in 12Be has been investigated for the first time through the 11Be(d,p) transfer reaction using a 5A MeV 11Be beam at TRIUMF, Canada. The reaction populated all the known bound states of 12Be. The ground state s-wave spectroscopic factor was determined to be 0.28−0.07+0.03 while that for the long-lived 02+ excited state was 0.73−0.40+0.27. This observation, together with the smaller effective separation energy indicates enhanced probability for an extended density tail beyond the 10Be core for the 02+ excited state compared to the ground state