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. TretyakEPL, 121 1 (2018) 12001DOI: https://doi.org/10.1209/0295-5075/121/12001