Direct Nuclear Reactions Leading to Unbound Residual Nuclei

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Abstract
The distorted-wave matrix element for direct reactions leading to three-body final states is written in terms of convergent integrals. The resulting expression can be evaluated in the Butler approximation, which leads to a diffractive model of the competition of, and interference between, direct breakup and sequential decay reaction mechanisms. Using Amado's methods, I demonstrate the general presence of such interference in processes of interest. Moreover, it should be possible to normalize unstable-state spectroscopic factors by measuring this interference.

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