Precise measurement of energy of the first excited state of 115Sn (Eexc ≃ 497.3 keV) V. A. Zheltonozhsky, A. M. Savrasov, N. V. Strilchuk and V. I. Tretyak EPL, 121 1 (2018) 12001 Published online: 02 March 2018 DOI: 10.1209/0295-5075/121/12001