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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
physics and astronomy
High-precision branching-ratio measurement for the superallowed β
+
emitter 74Rb
Physical Review C - Nuclear Physics, Volume 88, No. 4, Article 045501, Year 2013
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Description
A high-precision branching-ratio measurement for the superallowed β+ decay of 74Rb was performed at the TRIUMF Isotope Separator and Accelerator (ISAC) radioactive ion-beam facility. The scintillating electron-positron tagging array (SCEPTAR), composed of 10 thin plastic scintillators, was used to detect the emitted β particles; the 8π spectrometer, an array of 20 Compton-suppressed HPGe detectors, was used for detecting γ rays that were emitted following Gamow-Teller and nonanalog Fermi β+ decays of 74Rb; and the Pentagonal Array of Conversion Electron Spectrometers (PACES), an array of 5 Si(Li) detectors, was employed for measuring β-delayed conversion electrons. Twenty-three excited states were identified in 74Kr following 8.241(4)×108 detected 74Rb β decays. A total of 58 γ-ray and electron transitions were placed in the decay scheme, allowing the superallowed branching ratio to be determined as B 0=99.545(31)%. Combined with previous half-life and Q-value measurements, the superallowed branching ratio measured in this work leads to a superallowed ft value of 3082.8(65) s. Comparisons between this superallowed ft value and the world-average-corrected Ft̄ value, as well as the nonanalog Fermi branching ratios determined in this work, provide guidance for theoretical models of the isospin-symmetry-breaking corrections in this mass region. © 2013 American Physical Society.
Authors & Co-Authors
Dunlop, Ryan
Canada, Guelph
University of Guelph
Ball, Gordon C.
Canada, Vancouver
Triumf
Leslie, J. R.
Canada, Kingston
Queen’s University
Svensson, C. E.
Canada, Guelph
University of Guelph
Towner, Ian S.
United States, College Station
Cyclotron Institute
Andreoiu, Corina A.
Canada, Burnaby
Simon Fraser University
Chagnon-Lessard, Sophie
Canada, Guelph
University of Guelph
Chester, Aaron S.
Canada, Burnaby
Simon Fraser University
Cross, D. S.
Canada, Burnaby
Simon Fraser University
Finlay, Patrick
Canada, Guelph
University of Guelph
Garnsworthy, Adam B.
Canada, Vancouver
Triumf
Garrett, Paul E.
Canada, Guelph
University of Guelph
Glister, Julie F.
Canada, Vancouver
Triumf
Hackman, Greg S.
Canada, Vancouver
Triumf
Hadinia, B.
Canada, Guelph
University of Guelph
Leach, Kyle G.
Canada, Guelph
University of Guelph
Rand, Evan T.
Canada, Guelph
University of Guelph
Starosta, Krzysztof
Canada, Burnaby
Simon Fraser University
Tardiff, Eric R.
Canada, Vancouver
Triumf
Triambak, S.
Canada, Vancouver
Triumf
South Africa, Bellville
University of the Western Cape
Williams, S. J.
Canada, Vancouver
Triumf
Wong, John C.
Canada, Guelph
University of Guelph
Yates, Steven W.
United States, Lexington
University of Kentucky
Zganjar, Edward F.
United States, Baton Rouge
Louisiana State University
Statistics
Citations: 24
Authors: 24
Affiliations: 8
Identifiers
Doi:
10.1103/PhysRevC.88.045501
ISSN:
05562813
e-ISSN:
1089490X
Research Areas
Health System And Policy