Elsevier

Physics Letters B

Volume 666, Issue 5, 11 September 2008, Pages 430-434
Physics Letters B

Lithium isotopes beyond the drip line

https://doi.org/10.1016/j.physletb.2008.07.093Get rights and content
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Abstract

The unbound isotopes 10Li, 12Li and 13Li have been observed after nucleon-knockout reactions at relativistic energies with 11Li and 14Be beams impinging on a liquid hydrogen target. The channels Li9+n, Li11+n and Li11+2n were analysed in the ALADIN-LAND setup at GSI. The 10Li data confirm earlier findings, while the 12Li and 13Li nuclei were observed for the first time. The Li11+n relative-energy spectrum shows that the ground state of 12Li can be described as a virtual s-state with a scattering length of −13.7(1.6) fm. A broad energy spectrum was found for the Li11+2n channel. Based on the assumption that the relative-energy spectrum is dominated by a correlated background presumably stemming from initial correlations in the 14Be ground-state, evidence for a 13Li resonance at 1.47(31) MeV above the Li11+2n threshold with a width around 2 MeV has been found.

PACS

27.20.+n
24.70.+s

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