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Complete set of bound negative-parity states in the neutron-rich nucleus 18N
- Source :
- Physical Review C, 104(4):L041301. AMER PHYSICAL SOC, Physical Review C, Physical Review C, American Physical Society, 2021, 104 (4), pp.L041301. ⟨10.1103/PhysRevC.104.L041301⟩
- Publication Year :
- 2021
-
Abstract
- International audience; High-resolution γ-ray spectroscopy of N18 is performed with the Advanced GAmma Tracking Array, following deep-inelastic processes induced by an O18 beam on a Ta181 target. Six states are newly identified, which together with the three known excitations exhaust all negative-parity excited states expected in N18 below the neutron threshold. Spin and parities are proposed for all located states on the basis of decay branchings and comparison with large-scale shell-model calculations performed in the p-sd space, with the YSOX interaction. Of particular interest is the location of the 01− and 12− excitations, which provide strong constrains for cross-shell p-sd matrix elements based on realistic interactions and help to simultaneously reproduce the ground and first-excited states in N16 and N18, for the first time. Understanding the N18 structure may also have significant impact on neutron-capture cross-section calculations in r-process modeling including light neutron-rich nuclei.
Details
- Language :
- English
- ISSN :
- 24699985 and 24699993
- Database :
- OpenAIRE
- Journal :
- Physical Review C, 104(4):L041301. AMER PHYSICAL SOC, Physical Review C, Physical Review C, American Physical Society, 2021, 104 (4), pp.L041301. ⟨10.1103/PhysRevC.104.L041301⟩
- Accession number :
- edsair.doi.dedup.....2c5d19aa69a710e7f25a16a94a118582