4.5 Article

First direct measurement of resonance strengths in 17O(α, γ)21Ne

Journal

PHYSICAL REVIEW C
Volume 83, Issue 5, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.83.052802

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Funding

  1. National Science Foundation [Phys-0758100]
  2. Joint Institute for Nuclear Astrophysics [Phys-0822648]
  3. Direct For Mathematical & Physical Scien
  4. Division Of Physics [0918728] Funding Source: National Science Foundation

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The reaction O-17(alpha, gamma)Ne-21 has been measured by in-beam gamma spectroscopy for the first time in the energy range E-alpha = 750-1650 keV using highly enriched anodized Ta-2(O-17)(5) targets. Resonances were found at E-alpha = 1002, 1386, and 1619 keV. Their strengths and primary gamma-ray branchings are given. The new results exclude the low reaction rate of Descouvemont and support the rate of Caughlan and Fowler. Implications for the neutron poisoning efficiency of O-16 in the weak s-process are discussed.

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