Systematic investigation of the low-lying dipole excitations in even-even 124-136Ba isotopes Z. Zenginerler, E. Guliyev, A. A. Kuliev, H. Yakut and G. Soluk Eur. Phys. J. A, 49 9 (2013) 107 Published online: 05 September 2013 DOI: 10.1140/epja/i2013-13107-7