2018/12/31 by T. B. Webb, S. M. Wang, K. W. Brown +28 · 1 citation
Chemistry · Physics and Astronomy · #Analytical Chemistry (journal) #Asymmetry #Atomic and Molecular Physics #Atomic physics #Chemistry #Crystallography #Ground state #Halo #Multiplet #Neutron #Nuclear magnetic resonance #Nuclear physics #Nuclear physics research studies #Particle physics #Physics #Proton #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Spectral line #nucl-ex #nucl-th
paper · pdf · doi:10.1103/physrevlett.122.122501
published as Phys. Rev. Lett. 122, 122501 (2019) · 6 pages, three figures
openalex created_date 2019/01/01 · arxiv created 2019/03/20 · openalex publication_date 2019/03/29 · arxiv updated 2019/04/03 · openalex updated_date 2026/08/05
The structure of the extremely proton-rich nucleus 11~8O3, the mirror of the two-neutron halo nucleus 11~3Li8, has been studied experimentally for the first time. Following two-neutron knockout reactions with a 13O beam, the 11O decay products were detected after two-proton emission and used to construct an invariant-mass spectrum. A broad peak of width ∼3 MeV was observed. Within the Gamow coupled-channel approach, it was concluded that this peak is a multiplet with contributions from the four-lowest 11O resonant states: Jπ=3/2-1, 3/2-2, 5/2+1, and 5/2+2. The widths and configurations of these states show strong, non-monotonic dependencies on the depth of the p-9C potential. This unusual behavior is due to the presence of a broad threshold resonant state in 10N, which is an analog of the virtual state in 10Li in the presence of the Coulomb potential. After optimizing the model to the data, only a moderate isospin asymmetry between ground states of 11O and 11Li was found.