Abstract
The 11B(10B,9Be)12C reaction was studied at the energy of 41.3 MeV with transitions to the ground (0+) and low-lying excited 4.44 MeV (2+) and 9.64 MeV (3-) states of 12C nucleus. The analysis of the measured angular distributions was carried out using a modified distorted wave (MDWBA) method, assuming a one-step proton transfer mechanism. It was shown that at small angles (in the region of the main diffraction maximum) this reaction occurs on the nuclear surface with the dominance of a one-step process. This made possible to determine the values of asymptotic normalization coefficients (ANC) for 11B+p→12C. The squared ANCs equal to 322±76 fm-1, 32.8±6.4 fm-1 and 1.26±0.44 fm-1 for 0+, 2+ and 3- states of the 12C nucleus respectively were obtained. These values were used to take into account the contribution of the direct process in the calculation of astrophysical S-factors for the radiative capture of a proton by the 11B nucleus at astrophysical energies.