Cooper pair sizes in 11Li and in superfluid nuclei: a puzzle?

Abstract

We point out a strong influence of the pairing force on the size of the two neutron Cooper pair in ${}^{11}$Li, and to a lesser extent also in ${}^6$He. It seems that these are quite unique situations, since Cooper pair sizes of stable superfluid nuclei are very little influenced by the intensity of pairing, as recently reported. We explore the difference between ${}^{11}$Li and heavier superfulid nuclei, and discuss reasons for the exceptional situation in ${}^{11}$Li.

9 pages. To be published in J. of Phys. G special issue on Open Problems in Nuclear Structure (OPeNST)

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Cited by in corpus (6)

• The BCS-BEC crossover: From ultra-cold Fermi gases to nuclear systems
• Spin-polarized neutron matter: Critical unpairing and BCS-BEC precursor
• On the superfluid properties of the inner crust of neutron stars
• Microscopic calculations of 6He and 6Li with real-time evolution method
• Cold atoms beyond atomic physics
• Spatial correlation of a particle-hole pair with a repulsive isovector interaction