Systematics of incomplete fusion probability and its correlation with complete fusion suppression

The mechanism for the suppression of complete fusion, induced by different light alpha cluster projectiles (Z ≤ 10) on 51V target has been investigated through the measurement of break-up of the projectiles into different alpha fragments. The results from the present systems show substantial components from incomplete fusion in addition to complete fusion. The measurements also show significant reduction of complete fusion cross-section above the barrier energies for all the reactions when compared with the theoretical prediction of CCFULL code. CCFULL is a program that calculates fusion cross-sections and mean angular momenta of the compound nucleus under the influence of coupling between the relative motion and several collective nuclear motions. Moreover, measurements also show a systematics in complete fusion suppression with respect to CCFULL calculation, suggesting that the extent of suppression of complete fusion cross-sections is correlated with the alpha Q-value of the projectiles. Also, all the reactions were found to produce incomplete fusion products at energies near the respective Coulomb barriers with the alpha-particle emanating channel being the favored incomplete fusion process in all the cases.