Affiliation: | a LMOPS - University of Savoie, Bâtiment IUT, 73376 Le Bourget-du-lac Cedex, France b Institute for Nuclear Research and Nuclear Energy, BAS, 72 Tzarigradsko Shoosse, 1784 Sofia, Bulgaria c IHEP, Protvino 142281, Russia d LAPP - University of Savoie, BP 110, F74941 Annecy-le-Vieux, France |