CHAFA, A.; TATISCHEFF, V.; AGUER, P.; BARHOUMI, S.; COC, A.; GARRIDO, F.; HERNANZ, M.; JOSE, J.; KIENER, J.; LEFEBVRE-SCHUHL, A.; OUICHAOUI, S.; DE SEREVILLE, N.; THIBAUD, J. -P.

doi:10.1103/PhysRevLett.95.031101

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CHAFA, A.

TATISCHEFF, V.
Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse [CSNSM]

AGUER, P.
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]

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Physical Review Letters. 2005, vol. 95, p. 031101 (4 pages)

American Physical Society

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We report on the observation of a previously unknown resonance at E=194.1+/-0.6 keV (lab) in the 17-O(p,alpha)14-N reaction, with a measured resonance strength omega_gamma(p,alpha)=1.6+/-0.2 meV. We studied in the same experiment the 17-O(p,gamma)18-F reaction by an activation method and the resonance-strength ratio was found to be omega_gamma(p,alpha)/omega_gamma(p,gamma)=470+/-50. The corresponding excitation energy in the 18-F compound nucleus was determined to be 5789.8+/-0.3 keV by gamma-ray measurements using the 14-N(alpha,gamma)18-F reaction. These new resonance properties have important consequences for 17-O nucleosynthesis and gamma-ray astronomy of classical novae.< Leer menos

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proton-nucleus reactions

proton radiative capture

alpha particle-nucleus reactions

novae

nuclear energy level transitions

nucleosynthesis

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Hydrogen Burning of $^{17}$O in Classical Novae

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