The ANC of 16O states from 7Be + 12C α-transfer reaction to study 12C(α,γ)16O

Abstract

We measured the angular distributions for theC(Be,He)O transfer reaction at 35 MeV leading to several excited states ofO. The angular distribution of the ground state ofO was measured for the first time in this reaction. The corresponding Asymptotic Normalization Coefficients (ANC) of all the observed states were determined. The ANC of ground state, 6.92 MeV (2${}^{+}$) and 7.12 MeV (1${}^{-}$) subthreshold states ofO obtained from this work are utilized to determine the astrophysical $E$1 and $E$2 $S$-factors of theC(${\alpha ,\gamma )}^{16}$O reaction in an $R$-matrix analysis.