Role of higher-multipole deformations in exotic {sup 14}C cluster radioactivity

Journal Article · Wed Jun 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.064610· OSTI ID:21502794

Sawhney, Gudveen; Sharma, Manoj K; Gupta, Raj K ^[1]

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1. School of Physics and Material Science, Thapar University, Patiala 147004 (India)

We have studied nine cases of spontaneous emission of {sup 14}C clusters in the ground-state decays of the same number of parent nuclei from the trans-lead region, specifically from {sup 221}Fr to {sup 226}Th, using the preformed cluster model (PCM) of Gupta and collaborators, with choices of spherical, quadrupole deformation ({beta}{sub 2}) alone, and higher-multipole deformations ({beta}{sub 2}, {beta}{sub 3}, {beta}{sub 4}) with cold ''compact'' orientations {theta}{sup c} of decay products. The calculated {sup 14}C cluster decay half-life times are found to be in nice agreement with experimental data only for the case of higher-multipole deformations ({beta}{sub 2}-{beta}{sub 4}) and {theta}{sup c} orientations of cold elongated configurations. In other words, compared to our earlier study of clusters heavier than {sup 14}C, where the inclusion of {beta}{sub 2} alone, with ''optimum'' orientations, was found to be enough to give the best comparison with data, here for {sup 14}C cluster decay the inclusion of higher-multipole deformations (up to hexadecapole), together with {theta}{sup c} orientations, is found to be essential on the basis of the PCM. Interestingly, whereas both the penetration probability and assault frequency work simply as scaling factors, the preformation probability is strongly influenced by the order of multipole deformations and orientations of nuclei. The possible role of Q value and angular-momentum effects are also considered in reference to {sup 14}C cluster radioactivity.

• OSTI ID: 21502794
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 83, Issue 6; Other Information: DOI: 10.1103/PhysRevC.83.064610; (c) 2011 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
CARBON 14
CLUSTER MODEL
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
DAUGHTER PRODUCTS
EMISSION
FRANCIUM 221
GROUND STATES
HALF-LIFE
HEAVY NUCLEI
NUCLEAR DECAY
NUCLEAR DEFORMATION
PROBABILITY
Q-VALUE
RADIOACTIVITY
SCALING
SPHERICAL CONFIGURATION
THORIUM 226
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CARBON ISOTOPES
CONFIGURATION
DECAY
DEFORMATION
ENERGY
ENERGY LEVELS
EVALUATION
EVEN-EVEN NUCLEI
FRANCIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MINUTES LIVING RADIOISOTOPES
NUCLEAR MODELS
NUCLEI
ODD-EVEN NUCLEI
RADIOISOTOPES
SIMULATION
THORIUM ISOTOPES
YEARS LIVING RADIOISOTOPES