Phys. Rev. Lett. 99, 022506 (2007) [4 pages]Coexistence of BCS- and BEC-Like Pair Structures in Halo NucleiReceived 17 November 2006; published 13 July 2007 We investigate the spatial structure of the two-neutron wave function in the Borromean nucleus 11Li, using a three-body model of 9Li+n+n, which includes many-body correlations stemming from the Pauli principle. The behavior of the neutron pair at different densities is simulated by calculating the two-neutron wave function at several distances between the core nucleus 9Li and the center of mass of the two neutrons. With this representation, a strong concentration of the neutron pair on the nuclear surface is for the first time quantitatively established for neutron-rich nuclei. That is, the neutron pair wave function in 11Li has an oscillatory behavior at normal density, while it becomes a well-localized single peak in the dilute density region around the nuclear surface. We point out that these features qualitatively correspond to the BCS- and BEC-like structures of the pair wave function found in infinite nuclear matter. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.022506
DOI:
10.1103/PhysRevLett.99.022506
PACS:
21.30.Fe, 21.45.+v, 21.60.Gx, 21.65.+f
See AlsoComment: N. T. Zinner and A. S. Jensen, Comment on “Coexistence of BCS- and BEC-Like Pair Structures in Halo Nuclei”, Phys. Rev. Lett. 101, 179201 (2008). Reply: K. Hagino, H. Sagawa, J. Carbonell, and P. Schuck, Hagino et al. Reply:, Phys. Rev. Lett. 101, 179202 (2008). |
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