Coexistence of BCS- and BEC-Like Pair Structures in Halo Nuclei
- Department of Physics, Tohoku University, Sendai 980-8578 (Japan)
- Center for Mathematical Sciences, University of Aizu, Aizu-Wakamatsu, Fukushima 965-8560 (Japan)
- Laboratoire de Physique Subatomique et de Cosmologie, F-38026 Grenoble Cedex (France)
- Institut de Physique Nucleaire, CNRS, UMR8608, Orsay F-91406 (France)
We investigate the spatial structure of the two-neutron wave function in the Borromean nucleus {sup 11}Li, using a three-body model of {sup 9}Li+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 {sup 9}Li 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 {sup 11}Li 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.
- OSTI ID:
- 20957878
- Journal Information:
- Physical Review Letters, Vol. 99, Issue 2; Other Information: DOI: 10.1103/PhysRevLett.99.022506; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
Similar Records
Inelastic Collisions of a Fermi Gas in the BEC-BCS Crossover
BCS-BEC crossover and quantum phase transition for {sup 6}Li and {sup 40}K atoms across the Feshbach resonance