Study of the11B(p, n)11C reaction below the giant dipole resonance in12C

The11B(p, n)11C reaction has been studied for proton energies in the range (3 ÷ 6) MeV. Relative cross-sections were measured with a 4π counter in 15 to 20 keV steps. Absolute cross-sections were measured by using the activation technique to an accuracy of ± 10% at six different energies covering the range mentioned above. The observed resonance structure in the excitation function is compared with the predictions of an extended coupled-channel calculation.