Lifetime measurements of high-spin states in /sup 166/Yb

Journal Article · Sun Dec 14 23:00:00 EST 1986 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.57.3019· OSTI ID:7017333

Bacelar, J C; Holm, A; Diamond, R M; Beck, E M; Deleplanque, M A; Draper, J; Herskind, B; Stephens, F S

The Doppler-shift attenuation method was used to measure lifetimes of yrast states in /sup 166/Yb. Values of tau range from 0.16(2) ps at 24/sup +/ to 0.05(1) ps at 34/sup +/. The B(E2) values decrease from 240 to 120 single-particle units in this spin range, indicating a loss of collectivity which likely reflects a change of the nucleus towards triaxial shape. The side-feeding times are consistent with rotational cascades having moments of inertia 25% larger than the yrast sequence or B(E2) values around 60 single-particle units.

• Research Organization: Nuclear Science Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 7017333
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 57:24; ISSN PRLTA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
ARGON 40 REACTIONS
BETA DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
DATA
DAYS LIVING RADIOISOTOPES
DISTRIBUTION
DOPPLER EFFECT
E2-TRANSITIONS
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE RADIOISOTOPES
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
GAMMA RADIATION
HEAVY ION REACTIONS
HIGH SPIN STATES
INFORMATION
INTERMEDIATE MASS NUCLEI
IONIZING RADIATIONS
ISOTOPES
LIFETIME
MEV RANGE
MEV RANGE 100-1000
MULTIPOLE TRANSITIONS
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
PARITY
PARTICLE PROPERTIES
RADIATIONS
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SPIN
TARGETS
TELLURIUM 130 TARGET
YRAST STATES
YTTERBIUM 166
YTTERBIUM ISOTOPES