[en] The reaction ¹¹B(α,γ₀)¹⁵N is studied for 6 <= Esub(α) <= 11.5 MeV (15.5 <= Esub(x) <= 19.5 MeV). The excitation function measured at thetasub(lab)=90⁰ displays four strongly excited resonances at Esub(x)=16.35+-0.02, 16.73+-0.02, 17.67+-0.05, and 19.05+-0.05 MeV, and a probable one at Esub(x)=17.15+-0.05 MeV. These data and 14 angular distributions (0 <= thetasub(lab) <= 135⁰ for 16 <= Esub(x) <= 18 MeV) have been fitted with the S-matrix 'many levels' formalism. Jsup(π) assignments for the first four resonances are proposed. The cross section is about four times smaller than in ¹²C(t,γ₀)¹⁵N. Possible correlations are discussed with resonances observed in other reactions leading to ¹⁵N. (Auth.)