Elsevier

Nuclear Physics A

Volume 385, Issue 1, 30 August 1982, Pages 57-75
Nuclear Physics A

Search for low-energy resonances in 21Ne(p, γ)22Na and 22Ne(p, γ)23Na☆

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Abstract

The reactions 21Ne(p, γ)22Na and 22Ne(p, γ)23Na have been investigated at Ep(lab) = 70–355keV. Neon gas enriched to 91% in 21Ne and to 99% in 22Ne was recirculated in a differentially pumped gas target system of the extended-static and quasi-point supersonic jet type. For 21Ne(p, γ)22Na, new resonances were found at Ep = 126, 272, 291 and 352 keV. The 291 keV resonance corresponds to a new unbound state in 22Na. Excitation energies, γ-ray decay schemes, resonance widths and strengths as well as Jπ assignments are reported for all the resonances. Information on low-lying states in 22Na is also obtained. Of the 9 expected resonances in 22Ne(p, γ)23Na none has been observed. Upper limits on their ωγy strengths are presented. The astrophysical as well as the nulcear structure aspects of the results are discussed.

References (36)

  • T. Lee

    Rev. Geophys. Space Sci.

    (1979)
  • J. Zyskind et al.

    Astrophys. J. Lett.

    (1981)
    J. Zyskind et al.

    Astrophys. J. Lett.

    (1981)
  • M.A. Meyer et al.

    Nucl. Phys.

    (1973)
    J.J.A. Smit et al.

    Nucl. Phys.

    (1979)
  • T. Freye et al.

    Z. Phys.

    (1977)
  • C. Rolfs et al.

    Nucl. Instr.

    (1978)
  • H.P. Trautvetter et al.

    Nucl. Instr.

    (1979)
  • H. Kräwinkel et al.

    Z. Phys.

    (1982)
  • G. Hulke, C. Rolfs and H.P. Trautvetter, Nucl. Instr., in...
  • H.W. Becker, L. Buchmann, J. Görres, K.U. Kettner, H. Kräwinkel, C. Rolfs, P. Schmalbrock, H.P. Trautvetter and A....
  • H. Hinds et al.

    Nucl. Phys.

    (1964)
  • D.F. Hebbard et al.

    Nucl. Phys.

    (1963)
  • P.M. Endt

    Atomic Data and Nucl. Data Tables

    (1979)
  • E.K. Warburton et al.
  • W.A. Fowler et al.

    Ann. Rev. Astro, and Astrophysics

    (1975)
  • C. Rolfs et al.

    Ann. Rev. Nucl. Part. Sci.

    (1978)
  • E.E. Salpeter

    Phys. Rev.

    (1955)
    J.B. Marion et al.

    Astrophys. J.

    (1957)
  • M. Wiescher et al.

    Nucl. Phys.

    (1980)
  • C. Rolfs et al.

    Nucl. Phys.

    (1975)
    • ☆

    Supported by the Deutsche Forschungsgemeinschaft (Ro 429/13).

    ∗

    Supported by the Minister für Wissenschaft und Forschung des Landes Nordrhein-Westfalen.

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