Parity doubling in {sup 219}Th and the onset of collectivity above N=126

Journal Article · Wed Jul 15 04:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.80.011304· OSTI ID:21289962

Reviol, W; Sarantites, D G; Montero, M ^[1]; Chiara, C J ^[1]; Janssens, R V. F.; Carpenter, M P; Khoo, T L; Lauritsen, T; Lister, C J; Seweryniak, D; Zhu, S ^[2]; Pechenaya, O L ^[3]; Frauendorf, S G ^[4]

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1. Department of Chemistry, Washington University, St. Louis, Missouri 63130 (United States)
2. Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
3. Department of Physics, Washington University, St. Louis, Missouri 63130 (United States)
4. Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556 (United States)

Excited states in {sup 219}Th have been observed for the first time in an experiment using the {sup 26}Mg+{sup 198}Pt reaction and evaporation-residue-gated {gamma}-ray spectroscopy. Two structures of interlinked alternating-parity levels with simplex quantum numbers s={+-}i are observed, reminiscent of similar sequences in heavier odd-mass isotopes, but only three mass units away from the N=126 neutron closed shell. The emergence of quadrupole-octupole collectivity in this mass region and the trend for parity-doublet bands are discussed.

• OSTI ID: 21289962
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 80; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
EVAPORATION
EXCITED STATES
GAMMA SPECTROSCOPY
MAGNESIUM 26 TARGET
MASS
NEUTRONS
OCTUPOLES
PARITY
PLATINUM 198
QUANTUM NUMBERS
THORIUM 219