Ranges of Rn evaporation residues produced in the O16+Pt194 reaction

Abstract

Ranges for heavy atoms of evaporation residues (ERs) produced in nuclear fusion-evaporation reactions induced by accelerated heavy ions have been systematically considered. New range data obtained for $\ensuremath{\alpha}$-emitting short-lived Rn nuclei produced in the $^{16}\mathrm{O}+^{194}\mathrm{Pt}$ fusion-evaporation reaction have been obtained. These data were derived by the comparison of mean $\ensuremath{\alpha}$-particle energies of Rn-isotopes detected in experiments with the Monte Carlo simulations of these energies for the same isotopes stopped in the rotating Al catcher foil. As the result of this procedure applied to the production of $^{206}\mathrm{Rn}$ to $^{203}\mathrm{Rn}$ in the reaction, the ranges obtained in our experiments are 1.65 times larger than those expected from SRIM/TRIM calculations/simulations. To obtain an agreement of the predictions with the experimental data for such heavy atoms at low energies their electronic and/or nuclear stopping power components should be reduced.