Search for ${}^{21}$C and constraints on ${}^{22}$C

Abstract

A search for the neutron-unbound nucleus ${}^{21}$C was performed via the single proton removal reaction from a beam of 22 N at 68 MeV/u. Neutrons were detected with the Modular Neutron Array (MoNA) in coincidence with ${}^{20}$C fragments. No evidence for a low-lying state was found, and the reconstructed ${}^{20}$C+n decay energy spectrum could be described with an s-wave line shape with a scattering length limit of |as| < 2.8 fm, consistent with shell model predictions. A comparison with a renormalized zero-range three-body model suggests that ${}^{22}$C is bound by less than 70 keV.

Accepted for publication in Nuclear Physics A

References in corpus (5)

• Shell-model study of boron, carbon, nitrogen and oxygen isotopes based on monopole-based-universal interaction
• Direct mass measurements of 19B, 22C, 29F, 31Ne, 34Na and other light exotic nuclei
• Unbound excited states in 19,17C
• Unbound exotic nuclei studied by projectile fragmentation
• Reconstruction of nuclear charged fragment trajectories from a large gap sweeper magnet

Cited by in corpus (19)

• Efimov Physics: a review
• Effective field theory description of halo nuclei
• Intermediate energy four-body breakup calculations for 22C
• Shell-structure of one-particle resonances in deformed potentials
• Determination of the ${}^{36}$Mg($n,\gamma$)${}^{37}$Mg reaction rate from Coulomb dissociation of ${}^{37}$Mg
• Determining the 7Li(n,gamma) cross section via Coulomb dissociation of 8Li
• 2013 Update of the discoveries of nuclides
• Odd-even staggering in neutron drip line nuclei
• Coulomb breakup of 22C in a four-body model
• Core momentum distribution in two-neutron halo nuclei
• Two-neutron correlations in a Borromean ${}^{20}\mathrm{C}+n+n$ system: Sensitivity of unbound subsystems
• Observation of a low-lying neutron-unbound state in 19C
• Universal geometry of two-neutron halos and Borromean Efimov states close to dissociation
• Properties of Lithium-11 and Carbon-22 at leading order in halo effective field theory
• Three-body Description of $2n$-Halo and Unbound $2n$-Systems: ${}^{22}$C and ${}^{26}$O
• Universal Properties of Weakly Bound Two-Neutron Halo Nuclei
• One- and two-neutron halos in effective field theory
• Effective field theory for weakly bound two-neutron halo nuclei: corrections from neutron-neutron effective range
• Scaling limit analysis of Borromean halos