$\alpha$-stripping reactions with light exotic nuclei: $^{12}C(^7Be,^3He)^{16}O$

Considerable experimental and theoretical efforts have been devoted to examine the importance of $\alpha$-particle clustering in $p$-shell and $sd$-shell nuclei which is essential for the analysis of the helium- and silicon-burning processes in nuclear astrophysics. $\alpha$-stripping reactions such as $(^6Li,d)$ and $(^7Li,t)$ were used to prope the $\alpha$ structure of $^{16}$O. These studies shown that the $(^7Li,t)$ reaction is significantly more sellective than $(^6Li,d)$ reaction. New reaction, $(^7Be,^3He)$ has been studied at E($^7$Be)=34 MeV using the University of Michigan-University of Notre Dame radiactive nuclear beam facility. Angular distributions have been measured for several states in $^{16}$O. At this energy, this reaction exhibits a high selectivity for populating $\alpha$-cluster states in $^{16}$O. Furthermore, $^3$He-stripping reaction $(^7Be,\alpha)$ populating several states in $^{15}$O, never been reported befor for $(^7Li,t)$ or $(^6Li,d)$ reactions, was observed in our data. Experimental and theoretical analysis of this data will be presented.