“…The procedure used in section 2.2.2 to determine the unperturbed band-head energies Figure 17. Plots of aligned angular momentum, i x , as a function of rotational frequency, hω, for 182,184 Pb (this work), 186,188 Pb [48,49] and 180,182,184,186 Hg [15,16,23,24]. Rotational references with Harris parameters of J 0 = 27h 2 MeV −1 and J 1 = 199h 4 MeV −3 have been subtracted.…”