Systematic behavior of octupole states in deformed rare earth nuclei and the interacting boson approximation

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.54.176· OSTI ID:286191

Cottle, P D ^[1]; Zamfir, N V ^[2]

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1. Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)
2. Brookhaven National Laboratory, Upton, New York 11973 (United States)

A method for setting {epsilon}{sub {ital f}}, one of the parameters in the interacting boson approximation-1 (IBA-1) with one {ital f} boson, by using the systematic behavior of the centroids of observed {ital E}3 strength is proposed and applied to obtaining fits for octupole bands in the deformed rare earth region. The ordering of bands with different {ital K} values, {ital B}({ital E}3) strengths and {ital B}({ital E}1) values are well reproduced. The calculations are in good agreement with the data in nearly all the {ital K}=0, 1, and 2 octupole bands examined here. The least satisfactory fits were obtained for the {ital K}{sup {pi}}=0{sup {minus}} bands in {sup 160,162}Dy. It is predicted that in {sup 160,162,164}Dy, {sup 168}Er, and {sup 172}Yb the {ital K}=3 octupole states based on the ground state and having significant {ital E}3 strength are above 6 MeV and are strongly fragmented. These results are quite different from predictions made previously. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: Brookhaven National Laboratory
• DOE Contract Number: AC02-76CH00016; FG02-88ER40417; FG02-91ER40609
• OSTI ID: 286191
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 1 Vol. 54; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
DEFORMED NUCLEI
DYSPROSIUM 160
DYSPROSIUM 162
DYSPROSIUM 164
ERBIUM 168
GROUND STATES
INTERACTING BOSON MODEL
NUCLEAR FRAGMENTS
OCTUPOLES
RARE EARTH NUCLEI
YTTERBIUM 172