(6Li,d) reactions at sub-Coulomb energies for nuclear astrophysics

Near $\alpha$-threshold states play an important role in nuclear astrophysics as they often determine the ($\alpha$,$\gamma$), ($\alpha$,p) and ($\alpha$,n) reaction rates. Clustering can enhance the corresponding cross sections and it is necessary to measure the partial $\alpha$-width to evaluation the low energy cross section. We will discuss application of sub-Coulomb ($^6$Li,d) and ($^7$Li,t) $\alpha$-transfer reactions to extract an asymptotic normalization coefficients (ANCs) for the astrophysically important resonances and present new data on $^{12,13}$C,$^{16}$O($^6$Li,d) reactions.