Low energy fission investigated in reactions of 750 AMeV "2"3"8U-ions with Pb and Be targets

Charge distributions of fragments from low energy nuclear fission are investigated in reactions of highly fissile "2"3"8U projectiles at relativistic energies (750 AMeV) with a heavy (Pb) and a light (Be) target. The fully stripped fission fragments are separated by the Fragment Separator (FRS). Their high kinetic energies in the laboratory system allow the identification of all atomic numbers by using Multiple-Sample Ionization Chambers (MUSIC). The elemental distributions of fragments observed at larger magnetic rigidities than the "2"3"8U projectiles show asymmetric break-up and odd-even effects. They indicate a low energy fission process, induced mainly by dissociation in the electromagnetic field for the U/Pb-system, or by peripheral nuclear interactions for the U/Be-system. (orig.)43 refs.SIGLEAvailable from TIB Hannover: RO 801(95-59) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman