Speaker
Description
The single-nucleon energy levels and configurations of 12C are fundamental to our understanding of nuclear structure, yet they remain primarily defined by theoretical models and parameters extrapolated from neighboring systems. As a semi-closed shell nucleus featuring complex α-cluster states, direct measurements of the excited single-particle configurations in 12C are essential for refining nuclear models and informing nucleosynthesis pathways in astrophysics. We report on the first direct measurement of single-neutron strength in 12C for states up to Ex ≈ 22 MeV. The experiment was performed in inverse kinematics using the 11C(d,p) reaction at 10 MeV/u with the HELIOS spectrometer at Argonne National Laboratory. This setup allowed for high-resolution particle spectroscopy of the ejected protons, enabling the extraction of spectroscopic factors and orbital angular momentum transfers. The experimental configuration, data analysis methodology, and preliminary results regarding the distribution of single-neutron strength are presented.
This work was supported by the National Science Foundation under Grant No. PHY-2012522. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357 (ANL) and DE-SC0014552 (UCONN). This research used resources of ANL’s ATLAS facility, which is a DOE Office of Science User Facility.