Microscopic three-cluster study of the low-energy 9 Be photodisintegration

  • P. Descouvemont


The 9Be and 9B nuclei are investigated in a microscopic three-cluster model involving α + α + n (or α + α + p) configurations. The 8Be (0 + , 2 + ) + n and 5He (3/2 - , 1/2 - ) + α (or mirror) channels are included by taking account of the unstable nature of 8Be and 5He. Spectroscopic properties of 9Be and 9B are analyzed. We show that the 5He + α configurations cannot be neglected to derive accurate results. The 9Be(γ,αα)n photodisintegration cross-section is shown to be mainly determined by 8Be + n channels at low energies, but 5He + α channels become important beyond Eγ≈ 4 MeV.

PACS. 25.40.Lw Radiative capture – 24.50.+g Direct reactions – 25.60.Bx Elastic scattering 


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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2001

Authors and Affiliations

  • P. Descouvemont
    • 1
  1. 1.Physique Nucléaire Théorique et Physique Mathématique, Université Libre de Bruxelles, CP229, B-1050 Brussels, BelgiumBE

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