Excitation of the gas-phase selenium by electron impact Mykola Erdevdy, Pavlo Markush, Otto Shpenik and Vitalij Zvenihorodsky Eur. Phys. J. D, 69 1 (2015) 17 Published online: 13 January 2015 DOI: 10.1140/epjd/e2014-50642-0