The electron momentum distribution in holmium

The Compton profile of holmium has been measured at an intermediate resolution (0.4 a.u.) using 661.65 keV gamma-rays. The measurement has been compared with our renormalized-free-atom (RFA) and free electron-based profiles. It is seen that the RFA model with e−-e− correlation is in relatively better agreement with the experiment. The data is interpreted in terms of hybridization of 4f band with the 5d-6s bands. From our RFA calculations, we have also computed the cohesive energy of the lanthanide.