One-phonon octupole vibrational states in 136Xe, 137Cs, 138Ba, 140Ce and 142Nd with N = 82 J. K. Hwang, J. H. Hamilton and A. V. Ramayya Eur. Phys. J. A, 49 10 (2013) 125 Published online: 17 October 2013 DOI: 10.1140/epja/i2013-13125-5