The 15N(α,γ)19F reaction and nucleosynthesis of 19F

S. Wilmes, V. Wilmes, G. Staudt, P. Mohr, and J. W. Hammer
Phys. Rev. C 66, 065802 – Published 10 December 2002
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Abstract

Several resonances in the 15N(α,γ)19F reaction have been investigated in the energy range between 0.6 MeV and 2.7 MeV. Resonance strengths and branching ratios have been determined. High sensitivity could be obtained by the combination of the Dynamitron high current accelerator, the windowless gas target system Rhinoceros, and actively shielded germanium detectors. Two levels of 19F could be observed for the first time in the (α,γ) channel, and several weak branchings below the detection limits of previous experiments were measured. Two observed resonances correspond to α-cluster states in 19F, which have been assigned unambiguously. The astrophysical reaction rate is derived from this set of resonance strengths.

  • Received 19 August 2002

DOI:https://doi.org/10.1103/PhysRevC.66.065802

©2002 American Physical Society

Authors & Affiliations

S. Wilmes*, V. Wilmes, and G. Staudt

  • Physikalisches Institut, Universität Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen, Germany

P. Mohr

  • Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstraße 9, D-64289 Darmstadt, Germany

J. W. Hammer

  • Institut für Strahlenphysik, Universität Stuttgart, Allmandring 3, D-70569 Stuttgart, Germany

  • *Permanent address: Allianz Vers. AG, Königinstraße 28, D-80802 München, Germany
  • Permanent address: Mädchenrealschule Weichs, Freiherrnstraße 17, D-85258 Weichs, Germany
  • Corresponding author. Email address: mohr@ikp.tu-darmstadt.de

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Vol. 66, Iss. 6 — December 2002

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