Detailed spectroscopy of 46Ca: A study of the β- decay of 46K

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  • J. L. Pore
    Simon Fraser University
  • C. Andreoiu
    Simon Fraser University
  • J. K. Smith
    TRIUMF
  • A. D. MacLean
    University of Guelph, Ontario
  • A. Chester
    TRIUMF
  • J. D. Holt
    TRIUMF
  • G. C. Ball
    TRIUMF
  • P. C. Bender
    TRIUMF
  • V. Bildstein
    University of Guelph, Ontario
  • R. Braid
    Colorado School of Mines
  • A. Diaz Varela
    University of Guelph, Ontario
  • R. Dunlop
    University of Guelph, Ontario
  • L. J. Evitts
    TRIUMF
  • A. B. Garnsworthy
    TRIUMF
  • P. E. Garrett
    University of Guelph, Ontario
  • G. Hackman
    TRIUMF
  • S. V. Ilyushkin
    Colorado School of Mines
  • B. Jigmeddorj
    University of Guelph, Ontario
  • K. Kuhn
    Colorado School of Mines
  • P. Kunz
    TRIUMFSimon Fraser University
  • A. T. Laffoley
    University of Guelph, Ontario
  • K. G. Leach
    TRIUMF
  • D. Miller
    TRIUMF
  • W. J. Mills
    TRIUMF
  • W. Moore
    Colorado School of Mines
  • M. Moukaddam
    TRIUMF
  • L. N. Morrison
    TRIUMFUniversity of Surrey
  • B. Olaizola
    University of Guelph, Ontario
  • E. E. Peters
    University of Kentucky
  • A. J. Radich
    University of Guelph, Ontario
  • E. T. Rand
    University of Guelph, Ontario
  • F. Sarazin
    Colorado School of Mines
  • D. Southall
    TRIUMF
  • C. E. Svensson
    University of Guelph, Ontario
  • S. J. Williams
    Michigan State University
  • S. W. Yates
    University of Kentucky
We report on high-statistics data from the β- decay of the 46K Jπ = 2- ground state taken with the GRIFFIN spectrometer located at the TRIUMF-ISAC facility. In total, 199 γ rays and 42 excited states were placed in the level scheme, and from the observed β feeding and angular correlations of pairs of cascading γ rays, it was possible to assign spins and parities to excited states and determine mixing ratios for selected γ rays. The level structure of 46Ca is compared to theoretical predictions from a microscopic valence-space Hamiltonian derived from two- and three-nucleon forces. These calculations are in reasonable agreement with the experimental data and indicate that the protons in this region are not as inert as would be expected for semimagic nuclei.
Original languageEnglish
JournalPhysical Review C
Volume100
Issue number054327
DOIs
Publication statusPublished - 25 Nov 2019

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