34. mu. s isomer at high spin in sup 212 Fr: Evidence for a many-particle octupole coupled state

Journal Article · Sun Jul 01 00:00:00 EDT 1990 · Physical Review, C (Nuclear Physics); (USA)

OSTI ID:6414439

Byrne, A P; Dracoulis, G D; Schiffer, K J; Davidson, P M; Kibedi, T; Fabricius, B; Baxter, A M; Stuchbery, A E ^[1]

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1. Australian National University, Department of Nuclear Physics, Research School of Physical Sciences (Australia) Australian National University, G.P.O. Box 4, Canberra, Australian Capital Territory (Australia)

A very high spin isomeric state with {tau}{sub {ital m}}=34(3) {mu}s has been observed at an excitation energy of 8.5 MeV in {sup 212}Fr. The experimental evidence favors an {ital E}3 assignment, with a very large {ital E}3 transition strength, {ital B}({ital E}3)=100(12){times}10{sup 3} {ital e}{sup 2}fm{sup 6}, to one of the {gamma} rays de-exciting the isomer. The observed properties are in very good agreement with the characteristics of a 34{sup +} state predicted by the multiparticle octupole vibration model.

• OSTI ID: 6414439
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Vol. 42:1; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
FRANCIUM 212
HIGH SPIN STATES
ISOMERIC TRANSITIONS
CARBON 12 REACTIONS
COMPOUND-NUCLEUS REACTIONS
E3-TRANSITIONS
MEV RANGE 10-100
NEUTRONS
THALLIUM 205 TARGET
VIBRATIONAL STATES
ALKALI METAL ISOTOPES
ALPHA DECAY RADIOISOTOPES
BARYONS
BETA DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
FERMIONS
FRANCIUM ISOTOPES
HADRONS
HEAVY ION REACTIONS
HEAVY NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MEV RANGE
MICROSEC LIVING RADIOISOTOPES
MINUTES LIVING RADIOISOTOPES
MULTIPOLE TRANSITIONS
NAN
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
RADIOISOTOPES
TARGETS
651920* - Nuclear Properties & Reactions
A=190-219
Experimental