Spin-trap isomers in deformed, odd-odd nuclei in the light rare-earth region near N = 98

Masses of neutron-rich, odd-odd Pm, Eu, and Tb nuclei near N=98 were measured using the Canadian Penning Trap mass spectrometer at the Californium Rare Isotope Breeder Upgrade (CARIBU) facility. High-resolution mass measurements yielded the discovery of spin-trap isomers at N=97 in Tb162 , and in th...

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Bibliographic Details
Published in:Physical review. C 2020-07, Vol.102 (1), Article 011303
Main Authors: Orford, R., Kondev, F. G., Savard, G., Clark, J. A., Porter, W. S., Ray, D., Buchinger, F., Burkey, M. T., Gorelov, D. A., Hartley, D. J., Klimes, J. W., Sharma, K. S., Valverde, A. A., Yan, X. L.
Format: Article
Language:English
Subjects:
150 ≤ A ≤ 189
decay
isomer decays
mass spectrometry
NUCLEAR PHYSICS AND RADIATION PHYSICS
nuclear structure & decays
Penning traps
radioactive beams
states
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Summary:Masses of neutron-rich, odd-odd Pm, Eu, and Tb nuclei near N=98 were measured using the Canadian Penning Trap mass spectrometer at the Californium Rare Isotope Breeder Upgrade (CARIBU) facility. High-resolution mass measurements yielded the discovery of spin-trap isomers at N=97 in Tb162 , and in the N=99 isotones of Pm160 and Tb164 . Furthermore, no evidence of long-lived isomers were observed at N=95 in Eu158 , at N=97 in Pm158 , nor at N=101 in Eu164 and Tb166 . Here, these experimental observations are compared to results from multiquasiparticle blocking calculations.
ISSN:2469-9985
2469-9993
DOI:10.1103/PhysRevC.102.011303