Complete valence particle yrast lines in $N=84\mathrm{}$ nuclei above gadolinium

Gamma-ray measurements following fusion-evaporation reactions have identified in the $N=84\mathrm{}$ isotones from Ho to Yb the complete yrast lines formed by the configurations $\pi h_{\frac{11}{2}}^n\nu f_{\frac{7}{2}}^2$ and $\pi h_{\frac{11}{2}}^n\nu f_{\frac{7}{2}}{h}_{\frac{9}{2}}$ from the nuclear ground states up to their highest spins near $25\hslash$ at 5-8 MeV excitation. Their energies are predicted with high accuracy in parameter-free shell model calculations using experimental one- and two-body matrix elements.