Experimental study of the F-19(p,alpha gamma)O-16 reaction

The reaction F-19(p,alpha gamma)O-16 is often used as a source of normalisa tion for measurements of reactions with astrophysical interest. In order to reduce the uncertainty of experimental data, in this work we determined F- 19(p,alpha gamma)O-16 reaction cross sections at the 872 keV and 1370 keV r esonances, both by alpha-particle and gamma-ray counting. The angular distr ibutions of the different alpha-particle groups were also measured. The gam ma-ray excitation function, in the energy range 750-2800 keV, was studied f or the three gamma-ray lines. We have obtained a result that together with a previous one by Pecker et al narrow the uncertainty to less than 10%? for the 872 keV resonance.