Corrigendum to “Single-neutron knockout from 20C and the structure of 19C” [Phys. Lett. B 769 (2017) 503–508]

Cross-Shell States in 17,19C Populated via One-Neutron Knockout Reactions

“…The state at 2.89 MeV had an angular momentum of ℓ = 1 from the analysis of the longitudinal momentum distribution of the knockout residue, and was given a J π = 1/2 − 1 assignment. This constitutes the first observation of the cross-shell state in 19 C, providing the first constraint on the separation between the νp 1/2 and νs 1/2 orbits in the N = 13 isotonic chain below oxygen. One more resonance of a p-wave character has been identified, the decay scheme of which, however, could not be firmly established due to limited statistics in γ-neutron coincidence events and to unresolved background and resonance contributions in the γ and neutron energy spectra.…”

“…This interaction takes into account constraints from the monopole-based universal interaction V MU [25] for its Table I. Comparison of experimental results for the populated states in 17 C and 19 C with shell-model calculations using the YSOX interaction [23]. Experimental E x and C 2 S exp values for 17 C are preliminary ones.…”

“…The relative energy spectrum of 19 C exhibited three peaks [19], and their resonance parameters are partially reproduced in Table I. The state at 2.89 MeV had an angular momentum of ℓ = 1 from the analysis of the longitudinal momentum distribution of the knockout residue, and was given a J π = 1/2 − 1 assignment.…”

“…It is here noted that some discussion exists in Ref. [19] referring to the errors of C 2 S exp (for unbound states) not quoted in Table I (±15%), coming from an approximate use of the knockout reaction theory which was originally formulated for bound state transitions. It is of interest to increase a body of experimental data involving knockout leading to unbound final states, and to discuss the systematics of extracted spectroscopic strengths with further advanced theoretical treatments.…”

“…States in 19 cross-shell parts, including the ⟨pp|V|sdsd⟩ term which represents the interaction between the 0 and 2ℏω configurations [26]. For states located around 2.66 and 3.98 MeV, the orbital angular momentum has been determined to be ℓ = 1 from the comparison of the extracted momentum distributions of the knockout residue to Glauber model calculations performed using the code momdis [27].…”