Possible cluster preformation in the sup 14 C decay of sup 223 Ra

Journal Article · Wed Aug 01 04:00:00 EDT 1990 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.42.R495· OSTI ID:6602935

Hussonnois, M; Le Du, J F; Brillard, L; Ardisson, G ^[1]

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1. Institut de Physique Nucleaire, Boite Postale No. 1, 91406 Orsay CEDEX (France)

A recent experiment on the {sup 14}C fine structure has shown that the branching ratio to {sup 209}Pb ground state is quite different from the one predicted by the various models of cluster emission. Assuming that the {sup 14}C is preformed in the {sup 223}Ra nucleus, we have calculated the hindrance factor {ital F}{sup 14}C of the three {sup 14}C branches to {sup 209}Pb states with a barrier penetrability approximated by a square-well Coulomb potential. The {ital F}{sup 14}C=3.9 and 4.6 values found for the {sup 14}C transitions to the two excited states at 779 keV ({ital I}{sup {pi}}=11/2{sup +}) and 1423 keV ({ital I}{sup {pi}}=15/2{sup {minus}}), respectively, reveal that the cluster formation amplitudes in both transitions are close to those of the {sup 222}Ra and {sup 224}Ra {sup 14}C decays. Such values could be the result of {vert bar}{ital nlj}{r angle} shell-model components common to both the wave functions of the octupole deformed {sup 223}Ra nucleus and of the two first excited states of {sup 209}Pb spherical nucleus. The high hindrance factor {ital F}{sup 14}C=583 of the {sup 14}C branch to the {sup 209}Pb ground state ({ital I}{sup {pi}}=9/2{sup +}) could reveal the absence of {vert bar}1{ital g}{sub 9/2}{r angle} shell-model component in the {sup 223}Ra wave function.

• OSTI ID: 6602935
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 42:2; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

653005* -- Nuclear Theory-- Radioactive Decay
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ALPHA DECAY RADIOISOTOPES
AMPLITUDES
CARBON 14 DECAY RADIOISOTOPES
CARBON 14 EMISSION DECAY
COULOMB FIELD
DAYS LIVING RADIOISOTOPES
DECAY
DECAY AMPLITUDES
ELECTRIC FIELDS
EVEN-ODD NUCLEI
HEAVY ION DECAY RADIOISOTOPES
HEAVY ION EMISSION DECAY
HEAVY NUCLEI
ISOTOPES
MATHEMATICAL MODELS
NUCLEAR DECAY
NUCLEAR MODELS
NUCLEAR POTENTIAL
NUCLEI
POTENTIALS
RADIOISOTOPES
RADIUM 223
RADIUM ISOTOPES
SHELL MODELS
SQUARE-WELL POTENTIAL
TRANSITION AMPLITUDES