Uncommon decay branching ratios of spin-one states in the rare-earth region and evidence for K mixing

Journal Article · Thu Nov 01 00:00:00 EST 1990 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.42.1945· OSTI ID:6041851

Zilges, A; von Brentano, P ^[1]; Richter, A ^[2]; Heil, R D; Kneissl, U; Pitz, H H; Wesselborg, C ^[3]

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1. Institut fuer Kernphysik, Universitaet zu Koeln, D-5000 Koeln (Germany)
2. Institut fuer Kernphysik, Technische Hochschule Darmstadt, D-6100 Darmstadt (Germany)
3. Institut fuer Kernphysik, Justus-Liebig-Universitaet Giessen, D-6300 Giessen (Germany)

In nuclear resonance fluorescence (NRF) measurements of well deformed rare-earth nuclei we observe for most of the excited {ital J}=1 levels of both parities the ground-state transition and the corresponding transition to the 2{sub 1}{sup +} state. The experimental branching ratios {ital R}{sub exp}={ital B}(1{r arrow}2)/{ital B}(1{r arrow}0) are compared with the predictions of the Alaga rules. The examination of 171 levels found in NRF experiments yields that most values of {ital R}{sub exp} are in good agreement with the Alaga rules. Nevertheless, some branching ratios suggest a possible mixing of {ital K} values.

• OSTI ID: 6041851
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Vol. 42:5; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
YTTERBIUM 174
ENERGY-LEVEL TRANSITIONS
ANGULAR DISTRIBUTION
BRANCHING RATIO
BREMSSTRAHLUNG
DEFORMED NUCLEI
FLUORESCENCE
INTERACTING BOSON MODEL
ISOSPIN
MATRIX ELEMENTS
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EVEN-EVEN NUCLEI
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MATHEMATICAL MODELS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
PARTICLE PROPERTIES
RADIATIONS
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SHELL MODELS
STABLE ISOTOPES
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YTTERBIUM ISOTOPES
651820* - Nuclear Properties & Reactions
A=150-189
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653001 - Nuclear Theory- Nuclear Structure
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