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Fine structure in the alpha decay of U-223
Chinese Acad Sci, Inst Modern Phys, CAS Key Lab High Precis Nucl Spect, Lanzhou 730000, Gansu, Peoples R China.;Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China.;Lanzhou Univ, Lanzhou 730000, Gansu, Peoples R China..
Chinese Acad Sci, Inst Modern Phys, CAS Key Lab High Precis Nucl Spect, Lanzhou 730000, Gansu, Peoples R China.;Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China..
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.ORCID iD: 0000-0002-1406-5695
Beijing Normal Univ, Coll Nucl Sci & Technol, Key Lab Beam Technol & Mat Modificat, Minist Educ, Beijing 100875, Peoples R China.;Beijing Radiat Ctr, Beijing 100875, Peoples R China..
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Number of Authors: 322020 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 800, article id 135096Article in journal (Refereed) Published
Abstract [en]

Fine structure in the alpha decay of U-223 was observed in the fusion-evaporation reaction Re-187(Ar-40, p3n) by using fast digital pulse processing technique. Two alpha-decay branches of U-223 feeding the ground state and 244 keV excited state of Th-219 were identified by establishing the decay chain U-223 (alpha(1)) under right arrow Th-219 (alpha(2)) under right arrow Ra-215 (alpha(3)) under right arrow Rn-211. The alpha-particle energy for the ground-state to ground-state transition of U-223 was determined to be 8993(17) keV, 213 keV higher than the previous value, the half-life was updated to be 62(-10)(+14) mu s. Evolution of nuclear structure for N = 131 even-Z isotones from Po to U was discussed in the frameworks of nuclear mass and reduced alpha-decay width, a weakening octupole deformation in the ground state of U-223 relative to its lighter isotones Ra-219 and Th-221 was suggested.

Place, publisher, year, edition, pages
ELSEVIER , 2020. Vol. 800, article id 135096
Keywords [en]
Fine structure, alpha decay, Spin and parity, Reduced alpha-decay width, Quadrupole-octupole deformation
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:kth:diva-266928DOI: 10.1016/j.physletb.2019.135096ISI: 000503832500021Scopus ID: 2-s2.0-85075219606OAI: oai:DiVA.org:kth-266928DiVA, id: diva2:1390974
Note

QC 20200203

Available from: 2020-02-03 Created: 2020-02-03 Last updated: 2020-02-03Bibliographically approved

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