Analysis of the unbound spectrum of 12Li
Abstract
The unbound nucleus 12Li is evaluated by studying three-neutron one-proton excitations within the multistep shell model in the complex energy plane. It is found that the ground state of this system consists of an antibound 2- state. A number of narrow states at low energy are found which ensue from the coupling of resonances in 11Li to continuum states close to threshold.
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