Recoil--fission and recoil---fission events observed in the reaction Ca + Am

Forsberg, U.*; Rudolph, D.*; Andersson, L.-L.*; Di Nitto, A.*; Dllmann, Ch. E.*; Fahlander, C.*; Gates, J. M.*; Golubev, P.*; Gregorich, K. E.*; Gross, C. J.*; Herzberg, R.-D.*; Heberger, F. P.*; Khuyagbaatar, J.*; Kratz, J. V.*; Rykaczewski, K.*; Sarmiento, L. G.*; Schdel, M.; Yakushev, A.*; berg, S.*; Ackermann, D.*; Block, M.*; Brand, H.*; Carlsson, B. G.*; Cox, D.*; Derkx, X.*; Dobaczewski, J.*; Eberhardt, K.*; Even, J.*; Gerl, J.*; Jger, E.*; Kindler, B.*; Krier, J.*; Kojouharov, I.*; Kurz, N.*; Lommel, B.*; Mistry, A.*; Mokry, C.*; Nazarewicz, W.*; Nitsche, H.*; Omtvedt, J. P.*; Papadakis, P.*; Ragnarsson, I.*; Runke, J.*; Schaffner, H.*; Schausten, B.*; Shi, Y.*; Thrle-Pospiech, P.*; Torres, T.*; Traut, T.*; Trautmann, N.*; Trler, A.*; Ward, A.*; Ward, D. E.*; Wiehl, N.*

Alpha-decay chains observed in the element-115 production reactions of Ca + Am were investigated using a new data set consisting of our recently reported data obtained at GSI and previously reported ones at Dubna and LBNL. Short decay chains of recoil--()-fission type, fourteen of which were observed, and some of which were interpreted as the 2-neutron evaporation products Mc, have been reassigned. It is plausible that most of them were assigned to the 3-neutron evaporation products Mc whose decay chain would on the way have branches of EC decays followed by fission.