The15N( p, α 0)12C reaction at stellar energies

Details The15N( p, α 0)12C reaction at stellar energies The15N( p, α 0)12C reaction at stellar energies

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982zphya.305..325r&link_type=abstract

Zeitschrift für Physik A Atoms and Nuclei, Volume 305, Issue 4, pp.325-333

Astronomy and Astrophysics

Astrophysics

27

Scientific paper

The15N( ρ, α0)12C reaction has been investigated in the energy range of E p (lab)=78-810keV. The measurement of the excitation functions and α-particle angular distributions involved solid targets as well as a quasi-point supersonic jet gas target. The determination of absolute cross sections has been carried out with the gas target. The observed energy dependence of the total cross sections can be described in terms of two-level Breit-Wigner shapes including the resonances at E p ( J π)=335(1-) and 1,028(1-)keV. The data lead to a zero-energy intercept of the astrophysical S( E) factor of S(0)= 65±4MeV-b. The angular distributions are asymmetric around 90° and require an additional amplitude in the reaction mechanism, which interferes predominantly with the 335 keV resonance. The origin of this background amplitude is discussed.

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