Gamma-ray measurements following fusion-evaporation reactions have ide
ntified in the N = 84 isotones from Ho to Yb the complete yrast lines
formed by the configurations pi(11/2)(n) nu f(7/2)(2) and pi h(11/2)(n
) nu f(7/2)h(9/2) from the nuclear ground states up to their highest s
pins near 25h at 5-8 MeV excitation. Their energies are predicted with
high accuracy in parameter-free shell model calculations using experi
mental one-and two-body matrix elements.