Shell evolution of stable N = 50-56 Zr and Mo nuclei with respect to low-lying octupole excitations
E. T. Gregor, M. Scheck, R. Chapman, L. P. Gaffney, J. Keatings, K. R. Mashtakov, D. O’Donnell, J. F. Smith, P. Spagnoletti, M. Thürauf, V. Werner and C. Wiseman