Detailed spectroscopy of $^{219}$Th

The previously unexplored nucleus $^{219}$Th has been studied, using the $^{198}$Pt($^{26}$Mg,5n) E$_{lab}$=128 MeV (ATLAS) fusion-evaporation reaction and the Gammasphere + HERCULES detector combination. The level scheme constructed from evaporation-residue selected $\gamma $--ray coincidence data has the following features: The ground state E2 sequence [neutron (g$_{9/2})^{3}$] shows a vibrational-like behavior. Another positive-parity E2 sequence is present and concurs with the picture of weak coupling of an h$_{11/2}$ neutron to the $^{218}$Th core. Among the set of negative-parity states is a short E2 sequence that forms, together with the h$_{11/2}$ sequence, an octupole-type band. The discussion will focus on the latter band structure. A trend for parity doublets in odd-mass Th nuclei will be presented.