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The interaction of an E/A=70-MeV Be7 beam with a Be target was used to populate levels in Be6 following neutron knockout reactions. The three-body decay of the ground and first excited states into the α+p+p exit channel were detected in the High Resolution Array. Precise three-body correlations extracted from the experimental data allowed us to obtain insight into the mechanism of the three-body democratic decay. The correlation data are in good agreement with a three-cluster-model calculation and thus validate this theoretical approach over a broad energy range. © 2012 American Physical Society.

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Physical Review Letters