Unbound excited states in 19,17C

Abstract

The neutron-rich carbon isotopes 19,17C have been investigated via proton inelastic scattering on a liquid hydrogen target at 70 MeV/nucleon. The invariant mass method in inverse kinematics was employed to reconstruct the energy spectrum, in which fast neutrons and charged fragments were detected in coincidence using a neutron hodoscope and a dipole magnet system. A peak has been observed with an excitation energy of 1.46(10) MeV in 19C, while three peaks with energies of 2.20(3), 3.05(3), and 6.13(9) MeV have been observed in 17C. Deduced cross sections are compared with microscopic DWBA calculations based on p-sd shell model wave functions and modern nucleon-nucleus optical potentials. Jpi assignments are made for the four observed states as well as the ground states of both nuclei.

20 pages

References in corpus (6)

• Coulomb and nuclear breakup of a halo nucleus 11Be
• One-neutron removal reactions on neutron-rich psd-shell nuclei
• One-neutron removal reactions on light neutron-rich nuclei
• Longitudinal momentum distributions of {16,18}C fragments after one-neutron removal from {17,19}C
• Anomalously hindered E2 strength B(E2;2_1^+ -> 0^+) in 16C
• Nilsson diagrams for light neutron-rich nuclei with weakly-bound neutrons

Cited by in corpus (18)

• One- and two-neutron removal reactions from the most neutron-rich carbon isotopes
• Study of ground state properties of carbon isotopes with deformed relativistic Hartree-Bogoliubov theory in continuum
• Interplay between valence and core excitation mechanisms in the breakup of halo nuclei
• The total reaction cross section of heavy-ion reactions induced by stable and unstable exotic beams: The low-energy regime
• Search for ${}^{21}$C and constraints on ${}^{22}$C
• Hydrogen targets for exotic-nuclei studies developed over the past 10 years
• Beta-delayed neutron and gamma-ray spectroscopy of 17C utilizing spin-polarized 17B
• Linking the exotic structure of ${}^{17}$C to its unbound mirror ${}^{17}$Na
• Single-neutron knockout from ${}^{20}\text{C}$ and the structure of ${}^{19}\text{C}$
• 14Be(p,n)14B reaction at 69 MeV in inverse kinematics
• Semi-microscopic folding model for the description of two-body halo nuclei
• Evidence of strong dynamic core excitation in ${}^{19}$C resonant break-up
• One-neutron knockout reaction of 17C on a hydrogen target at 70 MeV/nucleon
• Constraints on the spectra of 17,19C
• Observation of a low-lying neutron-unbound state in 19C
• Unbound states in 17C and p-sd shell-model interactions
• Pauli Blocking effects in Nilsson states of weakly bound exotic nuclei
• Deformation, halo, and bubble structure: A paradigm shift of exotic phenomena in light to medium mass nuclei