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Systematic study of cluster radioactivity of superheavy nuclei
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
2018 (English)In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 97, no 1, article id 014318Article in journal (Refereed) Published
Abstract [en]

The probable cluster radioactivity (CR) of (294)118, (296)120, and (298)122 is studied by using the unified description (UD) formula, universal (UNIV) curve, Horoi formula, and universal decay law (UDL). The predictions by the former three models suggest that the probable emitted clusters are lighter nuclei, and the calculations within the UDL formula give a different prediction: that both the lighter clusters and heavier ones can be emitted from the parent nuclei. A further study on the competition between alpha decay and CR of Z = 104-124 isotopes is performed. The former three models predict that alpha decay is the dominant decay mode, but the UDL formula suggests that CR dominates over alpha decay for Z >= 118 nuclei and the isotopes of (292-296,308-318)118, (284-304,308-324)120, and (316-322)122 are the most likely candidates as the cluster emitters. Because the former three formulas are just preformation models, the lighter cluster emissions can be described. However, the UDL formula can predict the lighter and heavier CR owing to the inclusion of the preformation and fissionlike mechanisms. Finally, it is found that the shortest CR half-lives are always obtained when the daughter nuclei are around the double magic Pb-208 within the UDL formula, which indicates that shell effect has an important influence on CR.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2018. Vol. 97, no 1, article id 014318
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-222417DOI: 10.1103/PhysRevC.97.014318ISI: 000423429100002Scopus ID: 2-s2.0-85041176996OAI: oai:DiVA.org:kth-222417DiVA, id: diva2:1186397
Note

QC 20180228

Available from: 2018-02-28 Created: 2018-02-28 Last updated: 2018-02-28Bibliographically approved

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