Shapes of Exotic Nuclei by Single- and Multi-Step Coulomb Excitation

Coulomb excitation is a powerful technique for probing the shell structure, collectivity, and shapes of atomic nuclei through the measurement of electromagnetic moments. Single- and multi-step Coulomb excitation results from CLARION-BareBall at HRIBF-ORNL (e.g., $^{136}$Te) and GRETINA-CHICO2 at CARIBU-ANL (e.g., $^{106}$Mo and $^{106,110}$Ru) will be presented. A survey of the equipment, techniques, and results will be given. An emphasis will be placed on unique opportunities with $\sim$3-MeV/u beams and future directions at CARIBU and ReA3.