Neutron knockout of 12Be populating neutron-unbound states in 11Be
William A. Peters, T. Baumann, B. A. Brown, J. Brown, P. A. DeYoung,, J. E. Finck, N. Frank, K. L. Jones, J.-L. Lecouey, B. Luther, G. F. Peaslee,, W. F. Rogers, A. Schiller, M. Thoennessen, J. A. Tostevin, K. Yoneda
TL;DR
This study investigates neutron-unbound states in 11Be by knocking out neutrons from 12Be, identifying a specific excited state at 3.949 MeV, and comparing experimental results with shell model predictions.
Contribution
It provides new experimental data on unbound states in 11Be and confirms shell model predictions for the 0p3/2- level through knockout reactions.
Findings
Resonance at 80 keV decay energy identified in 11Be
Knockout cross section measured at 15 mb for the 3.949 MeV state
Spectroscopic factor near unity for the 0p3/2- level
Abstract
Neutron-unbound resonant states of 11Be were populated in neutron knock-out reactions from 12Be and identified by 10Be-n coincidence measurements. A resonance in the decay-energy spectrum at 80(2) keV was attributed to a highly excited unbound state in 11Be at 3.949(2) MeV decaying to the 2+ excited state in 10Be. A knockout cross section of 15(3) mb was inferred for this 3.949(2) MeV state suggesting a spectroscopic factor near unity for this 0p3/2- level, consistent with the detailed shell model calculations.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.