Microscopic derivation of the interacting boson Hamiltonian from a phenomenological interaction

A microscopic interacting boson model calculation is performed for Ba isotopes. The boson interactions are constructed by applying the Otsuka–Arima–Iachello mapping procedure to the phenomenological interactions given in previous systematic studies for A ~ 130 nuclei. The theoretical energy levels in the IBM are found to be in good agreement with those of the pair-truncated shell model.