Effects of non-zero spin in sub-barrier fusion involving odd mass nuclei: The case of ${}^{36}S+{}^{50}Ti$, ${}^{51}V$.

Stefanini A.M., Montagnoli G., Colucci G., Caciolli A., vColovi'c P., Corradi L., Fioretto E., Galtarossa F., Goasduff A., Mazzocco M., Montanari D., Parascandolo C., Scarlassara F., Siciliano M., Strano E., Szilner S., Vukman N.
  Giovedì 14/09   16:00 - 19:00   Aula A208   I - Fisica nucleare e subnucleare
Sub-barrier fusion reactions involving even-even nuclei have been mostly investigated for systems where both projectile and target are even-even nuclei, due to the simpler theoretical treatment when both nuclei have $0^{+}$ ground state. However, interesting effects are expected when odd spins are involved. Every magnetic substate must be treated separately, so that different ion-ion potentials should be associated to each case. This may influence fusion cross sections and barrier distributions. The fusion excitation functions for ${}^{36}S+{}^{50}Ti$, ${}^{51}V$ have been measured at LNL, where differences between the two reactions can be attributed to the non-zero spin ($7/2^{-}$) of the ${}^{51}V$ ground state.