Secondary Nuclei from Peripheral and Ultraperipheral Collisions of Relativistic Heavy Ions

The production of heavy secondary nuclei in 197 Au– 197 Au collisions at NICA and in 129 Xe– 129 Xe and 208 Pb– 208 Pb collisions at the LHC is calculated by means of Glauber Monte Carlo model connected with nuclear de-excitation models from Geant4 toolkit. The production of secondary nuclei in ultraperipheral heavy-ion collisions is additionally simulated with the RELDIS model, which predicts the dominance of neutron emission in the electromagnetic interactions of the considered nuclei. As found, Te, I and Au, Hg, Tl nuclei are frequently produced, respectively, in decays of 129 Xe and 208 Pb excited electromagnetically at the LHC. In contrast, mostly gold isotopes are produced in ultraperipheral collisions at NICA. A possible impact of secondary nuclei on collider components is discussed.