Phys. Rev. C 72, 054322 (2005) [16 pages]Complex shell model representation including antibound statesReceived 2 July 2005; published 30 November 2005 A generalization of the complex shell model formalism is presented that includes antibound states in the basis. These states, together with bound states, Gamow states, and the continuum background, represented by properly chosen scattering waves, form a representation in which all states are treated on the same footing. Two-particle states are evaluated within this formalism, and observable two-particle resonances are defined. The formalism is illustrated in the well-known case of 11Li in its bound ground state and in 70Ca(g.s.), which is also bound. Both cases are found to have a halo structure. These halo structures are described within the generalized complex shell model. We investigated the formation of two-particle resonances in these nuclei, but no evidence of such resonances was found. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.72.054322
DOI:
10.1103/PhysRevC.72.054322
PACS:
21.10.Tg, 23.50.+z, 24.10.Eq
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