Journal
PHYSICAL REVIEW C
Volume 95, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.95.041302
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Funding
- European Research Council [MINOS-258567]
- IPA program at RIKEN Nishina Center
- Ministerio de Economia y Competitividad [FIS-2014-53434]
- Programa Ramon y Cajal [11420]
- German BMBF [05P15PKFNA, 05P12RDFN8, 05P15RDFN1]
- Ministerio de Economy Competitividad [FPA2014-57196-C5-4-P]
- Hundred-Talent Program at Chinese Academy of Sciences
- National Natural Science Foundation of China [11405224]
- Japan Society for the Promotion of Science [2604327]
- Vietnam Ministry of Science and Technology
- STFC [ST/P003982/1, ST/L005840/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/P003982/1, ST/L005840/1, 1348838, ST/G000697/1 NuSTAR, 1137273] Funding Source: researchfish
- Grants-in-Aid for Scientific Research [15J08882, 16F16323, 16F16026] Funding Source: KAKEN
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Neutron-rich Se-88,Se-90,Se-92,Se-94 isotopes were studied via in-beam gamma-ray spectroscopy after nucleon removal reactions at intermediate energies at the Radioactive Isotope Beam Factory. Based on gamma-gamma coincidence analysis, low-lying excitation level schemes are proposed for these nuclei, including the 2(1)(+), 4(1)(+) states and 2(2)(+) states at remarkably low energies. The low-lying 2(2)(+) states, along with other features, indicate triaxiality in these nuclei. The experimental results are in good overall agreement with self-consistent beyond-mean-field calculations based on the Gogny D1S interaction, which suggests both triaxial degree of freedom and shape coexistence playing important roles in the description of intrinsic deformations in neutron-rich Se isotopes.
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