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- W2223206650 abstract "Neutron-rich light nuclei situated near the neutron drip line are surrounded by a neutron halo that extends far beyond the nuclear core. Evidence for a very low-lying state in the particle-unstable nucleus {sup 10}Li could have important consequences for the understanding of the {sup 11}Li halo viewed as a three-body (n+n+{sup 9}Li) system. A collaboration has used radioactive beams of {sup 11}Be (460 MeV/u) and {sup 11}Li (280 MeV/u) from the GSI-SIS-FSR complex in Darmstadt to produce {sup 10}Li as an intermediate product from proton and neutron stripping on a carbon target. The radial momentum distributions of fast neutrons in coincidence with selected nuclear fragments are very sensitive to the fragment selected, and they demonstrate the important interplay between halo structure and reaction mechanism. It is shown that {sup 10}Li has an l=0 ground state characterized by a large scattering length, of the order of 20 fm corresponding to an energy of the virtual state of only 0.05 MeV. The neutron halo in {sup 11}Li seems to be in a strongly mixed state with appreciable (1s{sub 1/2}){sup 2} and (0p{sub 1/2}){sup 2} components." @default.
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- W2223206650 date "1995-04-01" @default.
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- W2223206650 title "The neutron halo studied with fast radioactive beams" @default.
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