Microscopic nature of the photon strength function: stable and unstable Ni and Sn isotopes Oleg Achakovskiy, Alexander Avdeenkov, Stephane Goriely, Sergei Kamerdzhiev, Siegfried Krewald and Dmitriy Voitenkov EPJ Web of Conferences, 93 (2015) 01034 Published online: 28 May 2015 DOI: 10.1051/epjconf/20159301034