Evaporation residues resulting from fusion of ${}^{20}$O incident ions with ${}^{12}$C target nuclei have been measured for the first time. The cross-section associated with compound nuclei that de-excite via emission of charged particles is extracted. The resulting excitation function is compared with the predictions of a standard fusion model followed by statistical decay code. A significant underprediction of the measured cross-section by the fusion-evaporation model raises the question of whether the fusion cross-section is larger for the neutron-rich projectile or the statistical de-excitation is incorrectly predicted.

• Received 27 September 2011

DOI:https://doi.org/10.1103/PhysRevC.85.024605