Detection system of DGFRS-2 setup: simulation of heavy recoil spectra and radiation limits

The detection system of the DGFRS-2 setup was employed in long-term experiments using ion beams of 40Ar , 48Ca , 50Ti , and 54Crfrom the DC-280 cyclotron at the Flerov Laboratory of Nuclear Reactions (FLNR JINR). The registered energy spectra of recoiled superheavy nuclei were compared to calculated spectra, and satisfactory agreement was achieved. Additionally, radiation effects observed during prolonged irradiation were investigated. These effects included the growth of leakage current in the DSSD focal detector as well as limitations on the use of silicon detectors and the application of ER spectra modeling in long-term experiments. A representative example illustrating the increase in leakage current of a DSSD detector during the experiment is presented. An attempt to predict the lifetime of the DSSD detector in experiments at the DGFRS-2 setup is proposed, based on simple scaling of radiation damageeffects using the non-ionizing energy loss (NIEL) concept.