Photon Strength Functions from Two-Step γ Cascades Experiment on 155,157Gd J. Kroll, S. Valenta, M. Krtička, F. Bečvář, I. Tomandl and G. E. Mitchell EPJ Web of Conferences, 93 (2015) 01036 Published online: 28 May 2015 DOI: 10.1051/epjconf/20159301036