Entrance channel dependence of quasi fission in reactions leading to 206Po compound nucleus

The evaporation residue (ER) cross sections for the reaction ${}^{19}F{+}^{187}Re{\to }^{206}P{o}^{⁎}$ are measured, in the excitation energy range of 86.1 to 118.4 MeV. The measured cross sections are compared with that of ³⁰Si + ¹⁷⁶Yb reaction populating the same compound nucleus. Theoretical calculations are performed using the coupled - channels calculations for the capture cross sections and statistical model calculations for the ER cross sections. The dependence of quasi fission on entrance channel parameters such as charge product (Z₁Z₂), mass asymmetry (α), target deformation (${\beta }_2$) and effective fissility (${\chi }_{eff}$) are studied.