Production of new neutron-rich isotopes of heavy elements in fragmentation reactions of 238U projectiles at 1 A GeV
Abstract
The production of heavy neutron-rich nuclei has been investigated using cold fragmentation reactions of 238U projectiles at relativistic energies. The experiment performed at the high-resolving-power magnetic spectrometer FRS at GSI allowed to identify 45 new heavy neutron-rich nuclei: 205Pt, 207-210Au, 211-216Hg, 213-217Tl, 215-220Pb, 219-224Bi, 221-227Po, 224-229At, 229-231Rn and 233Fr. The production cross sections of these nuclei were also determined and used to benchmark reaction codes that predict the production of nuclei far from stability.
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