Large-scale shell model calculations for the N=126 isotones Po–Pu

Large-scale shell model calculations were performed in the full Z=82–126 proton model space π(0h_9/2, 1f_7/2, 0i_13/2, 2p_3/2, 1f_5/2, 2p_1/2) employing the code NATHAN. The modified Kuo-Herling interaction was used, no truncation was applied up to protactinium (Z=91) and seniority truncation beyond. The results are compared to experimental data including binding energies, level schemes, and electromagnetic transition rates. An overall excellent agreement is obtained for states that can be described in this model space. Limitations of the approach with respect to excitations across the Z=82 and N=126 shells and deficiencies of the interaction are discussed.