期刊
PHYSICAL REVIEW C
卷 105, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.105.024323
关键词
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资金
- ISOLDE Collaboration
- Science and Technology Facilities Council (STFC
- UK) [ST/P004598/1, ST/L005808/1, ST/R004056/1]
- Federal Ministry of Education and Research (BMBF
- Germany) [05P18RDCIA, 05P15PKCIA, 05P18PKCIA, 05P2018]
- National Science Centre (Poland) [2015/18/M/ST2/00523]
- European Union [654002, 771036]
- Marie Skodowska-Curie Actions COFUND grant (EU-CERN) [665779]
- Research Foundation Flanders (FWO, Belgium)
- BOF KU Leuven [GOA/2015/010]
- Interuniversity Attraction Poles Programme
- Belgian Science Policy Office (BriX network) [P7/12]
- Russian Foundation for Basic Research [17-52-12015]
- Academy of Finland [307685]
- Academy of Finland (AKA) [307685, 307685] Funding Source: Academy of Finland (AKA)
- Marie Curie Actions (MSCA) [665779] Funding Source: Marie Curie Actions (MSCA)
The nature of quadrupole and octupole collectivity in 222Rn was investigated using Coulomb excitation. The measurements showed a constant electric-quadrupole moment and varying electric-octupole moments for different transitions. In addition, four excited non-yrast states were discovered.
The nature of quadrupole and octupole collectivity in 222Rn was investigated by determining the electricquadrupole (E2) and octupole (E3) matrix elements using subbarrier, multistep Coulomb excitation. The radioactive 222Rn beam, accelerated to 4.23 MeV/u, was provided by the HIE-ISOLDE facility at CERN. Data were collected in the Miniball gamma -ray spectrometer following the bombardment of two targets, 120Sn and 60Ni. Transition E2 matrix elements within the ground-state and octupole bands were measured up to 10 h over bar and the results were consistent with a constant intrinsic electric-quadrupole moment, 518(11) e fm2. The values of the intrinsic electric-octupole moment for the 0+ -> 3- and 2+ -> 5- transitions were found to be respectively -210 e fm3 and 2300+300-500 e fm3 while a smaller value, 1200+500-900 e fm3, was found for the 2+ -> 1- transition. In addition, four excited non-yrast states were identified in this work via gamma -gamma coincidences.
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