Systematic investigation of the low-lying dipole excitations in even-even 124-136Ba isotopesZ. Zenginerler, E. Guliyev, A. A. Kuliev, H. Yakut and G. SolukEur. Phys. J. A, 49 9 (2013) 107DOI: https://doi.org/10.1140/epja/i2013-13107-7