title: Hydrogen burning of 17O in classical novae.
abstract: We report on the observation of a previously unknown resonance at E(lab)(R)=194.1+/-0.6 keV in the 17O(p,alpha)14N reaction, with a measured resonance strength omegagamma(palpha)=1.6 +/- 0.2 meV. We studied in the same experiment the 17O(p,gamma)18F reaction by an activation method and the resonance-strength ratio was found to be omegagamma(palpha)/omegagamma(pgamma) = 470 +/- 50. The corresponding excitation energy in the 18F compound nucleus was determined to be 5789.8 +/- 0.3 keV by gamma-ray measurements using the 14N(alpha, gamma)18F reaction. These new resonance properties have important consequences for 17O nucleosynthesis and gamma-ray astronomy of classical novae.
authors.affiliation: USTHB-Faculté de Physique, BP 32, El-Alia, 16111 Bab Ezzouar, Algiers, Algeria.
authors.forename: A
authors.initials: A
authors.lastname: Chafa
authors.forename: V
authors.initials: V
authors.lastname: Tatischeff
authors.forename: P
authors.initials: P
authors.lastname: Aguer
authors.forename: S
authors.initials: S
authors.lastname: Barhoumi
authors.forename: A
authors.initials: A
authors.lastname: Coc
authors.forename: F
authors.initials: F
authors.lastname: Garrido
authors.forename: M
authors.initials: M
authors.lastname: Hernanz
authors.forename: J
authors.initials: J
authors.lastname: José
authors.forename: J
authors.initials: J
authors.lastname: Kiener
authors.forename: A
authors.initials: A
authors.lastname: Lefebvre-Schuhl
authors.forename: S
authors.initials: S
authors.lastname: Ouichaoui
authors.forename: N
authors.initials: N
authors.lastname: de Séréville
authors.forename: J-P
authors.initials: JP
authors.lastname: Thibaud