Abstract
We study the Coulomb breakup cross section of the22C nucleus and its relation with three-body resonances and ground state properties. Cross sections are computed with a Coulomb corrected four-body eikonal model and they are constructed by fixing the continuum state and varying the ground state of22C. These states are calculated by using20C-n potentials that provide different scattering lengths and resonance energies, of a presumed virtual state and of a d resonance in21C. We find that the breakup cross section is strongly dependent on the ground state properties and we predict the existence of a 2+ narrow resonance in22C.
Highlights
The 22C nucleus is the heaviest Borromean nucleus known so far
We study the Coulomb breakup cross section of the 22C nucleus and its relation with three-body resonances and ground state properties
Cross sections are computed with a Coulomb corrected four-body eikonal model and they are constructed by fixing the continuum state and varying the ground state of 22C
Summary
The 22C nucleus is the heaviest Borromean nucleus known so far. Its deduced rms radius, rrms, and two neutron separation energy, S2n, present large uncertainties (rrms = 5.4 ± 0.9 fm [1] and, S2n = 0.42 ± 0.94 MeV [1] and S2n < 300 keV [2]). We study the Coulomb breakup cross section of the 22C nucleus and its relation with three-body resonances and ground state properties. Cross sections are computed with a Coulomb corrected four-body eikonal model and they are constructed by fixing the continuum state and varying the ground state of 22C. These states are calculated by using 20C−n potentials that provide different scattering lengths and resonance energies, of a presumed virtual state and of a d resonance in 21C.
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