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Mixing of bound and unbound levels

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Weidenmüller,  H.A.
Prof. Hans A. Weidenmüller, Emeriti, MPI for Nuclear Physics, Max Planck Society;

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Citation

von Brentano, P., Jolos, R., & Weidenmüller, H. (2002). Mixing of bound and unbound levels. Physics Letters B, 534(1-4), 63-68.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-84EB-0
Abstract
We consider a system of two discrete levels coupled to a channel. The levels are close to threshold. We investigate the influence of the channel threshold on positions and widths of the levels. We introduce a simple parameterization of the energy dependence of the coupling matrix elements. Simple examples demonstrate the importance of this dependence.