The ${\mathit{E}}_{\mathrm{\alpha },\mathrm{l}\mathrm{a}\mathrm{b}}$=679 keV (5/$2^{+}$) and ${\mathit{E}}_{\mathrm{\alpha },\mathrm{l}\mathrm{a}\mathrm{b}}$=687 keV (3/$2^{\mathrm{-}}$) resonances in the ${}_{}{}^{15}{}_{}{}^{}\mathrm{N}$(α,γ${)}^{19}$F reaction have been analyzed using a windowless gas target system and a 100% relative efficiency germanium detector with an active BGO shielding. The strength of the ${\mathit{E}}_{\mathrm{\alpha },\mathrm{l}\mathrm{a}\mathrm{b}}$=687 keV resonance has been determined: ωγ= 8±3 μeV. The strength of the ${\mathit{E}}_{\mathrm{\alpha },\mathrm{l}\mathrm{a}\mathrm{b}}$=461 keV resonance and the properties of the corresponding resonances in the mirror reaction ${}_{}{}^{15}{}_{}{}^{}\mathrm{O}$(α,γ${)}^{19}$Ne have been derived using a realistic folding potential.

• Received 7 August 1995

DOI:https://doi.org/10.1103/PhysRevC.52.R2823