Experimental cross section study of 40Ca+175Lu: Searching for new neutron-deficient Pa isotopes

摘要

The fusion-evaporation reaction 40Ca + 175Lu aimed at synthesizing new neutron-deficient protactinium isotopes has been studied at the gas-filled recoil separators SHANS and SHANS2. The cross sections for the xn and pxn evaporation channels were measured. The calculation by the statistical model HIVAP was performed to reproduce the experimental data. The quasifission process in the 40Ca + 175Lu reaction was also studied with time-dependent Hartree-Fock theory and the improved quantum molecular dynamics model. It is shown that the influence of quasifission in the analysis of evaporation residue cross sections of this reaction can be neglected.