Lifetime of the K{sup {pi}}=8{sup -} isomer in the neutron-rich nucleus {sup 174}Er, and N=106 E1 systematics

Journal Article · Mon Jun 15 00:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.79.061303· OSTI ID:21289893

Dracoulis, G D; Lane, G J ^[1]; Kondev, F G; Chiara, C J ^[2]; Watanabe, H ^[3]; Seweryniak, D; Zhu, S; Carpenter, M P; Janssens, R V. F.; Lauritsen, T; Lister, C J; McCutchan, E A ^[4]; Stefanescu, I ^[4]

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1. Department of Nuclear Physics, R. S. Phys. S. E, Australian National University, Canberra ACT 0200 (Australia)
2. Nuclear Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
3. RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
4. Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

Chopped-beam techniques and {gamma}-ray spectroscopy with Gammasphere have been used to measure the lifetime of the 1112-keV 8{sup -} isomeric state in {sup 174}Er. The value obtained of {tau}=5.8(4) s corresponds to a reduced hindrance of f{sub {nu}}=98 for the 163-keV E1 transition to the 8{sup +} state of the ground-state band, in good agreement with the systematics of the corresponding E1 strengths in the N=106 isotones. The K-mixing in the 8{sup -} states is calculated in the context of the particle-rotor model and used to extract the underlying reduced hindrances.

• OSTI ID: 21289893
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 79, Issue 6; Other Information: DOI: 10.1103/PhysRevC.79.061303; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BEAMS
E1-TRANSITIONS
ERBIUM 174
GAMMA SPECTROSCOPY
GROUND STATES
ISOMERS
ISOTONIC NUCLEI
KEV RANGE
LIFETIME
MIXING
NEUTRON-RICH ISOTOPES
PARTICLE-CORE COUPLING MODEL