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Kurcewicz, J.; Farinon, F.; Geissel, H.; Pietri, S.; Nociforo, C.; Prochazka, A.; Weick, H.; Winfield, J.S.; Estradé, A.; Allegro, P.R.P.; Bail, A.; Bélier, G.; Benlliure, J.; Benzoni, G.; Bunce, M.; Bowry, M.; Caballero-Folch, R.; Dillmann, I.; Evdokimov, A.; Gerl, J.; Gottardo, A.; Gregor, E.; Janik, R.; Kelić-Heil, A.; Knöbel, R.; Kubo, T.; Litvinov, Yu.A.; Merchan, E.; Mukha, I.; Naqvi, F.; Pfützner, M.; Pomorski, M.; Podolyák, Zs; Regan, P.H.; Riese, B.; Ricciardi, M.V.; Scheidenberger, C.; Sitar, B.; Spiller, P.; Stadlmann, J.; Strmen, P.; Sun, B.; Szarka, I.; Taïeb, J.; Terashima, S.; Valiente-Dobón, J.J.; Winkler, M.; Woods, Ph
Physics letters. B, 10/2012, Letnik: 717, Številka: 4-5Journal Article
Using the high-resolution performance of the fragment separator FRS at GSI we have discovered 60 new neutron-rich isotopes in the atomic number range of 60 <= Z <= 78 . The new isotopes were unambiguously identified in reactions with a U 238 beam impinging on a Be target at 1 GeV/nucleon. The production cross-section for the new isotopes have been measured down to the pico-barn level and compared with predictions of different model calculations. For elements above hafnium fragmentation is the dominant reaction mechanism which creates the new isotopes, whereas fission plays a dominant role for the production of the new isotopes up to thulium.
