Microscopic three-cluster study of the low-energy
9
Be photodisintegration |
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Authors: | P Descouvemont |
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Institution: | (1) Physique Nucléaire Théorique et Physique Mathématique, Université Libre de Bruxelles, CP229, B-1050 Brussels, Belgium, BE |
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Abstract: | 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 E
γ≈ 4 MeV.
Received: 7 September 2001 / Accepted: 19 November 2001 |
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Keywords: | PACS 25 40 Lw Radiative capture – 24 50 +g Direct reactions – 25 60 Bx Elastic scattering |
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