Gamma-Ray Spectroscopy for Neutron-Rich A≈160-170 Nuclei:. the β- Decay of 159PM, 160-162SM, 162EU, 164-166GD, and 166-168TB

β^- decays of neutron-rich A≈160-170 nuclei ¹⁵⁹Pm, ^160-162Sm, ¹⁶²Eu, ^164-166Gd, and ^166-168Tb have been studied through γ-ray spectroscopy using an on-line isotope separator. These nuclei were produced by the 15-20 MeV proton induced fission of ²³⁸U. Excited states of their daughter nuclei have been established.