Spectroscopic study of Ca-47 from the beta(-) decay of K-47

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  • A. B. Garnsworthy
    TRIUMF
  • J. L. Pore
    Simon Fraser University
  • C. Andreoiu
    Simon Fraser University
  • A. D. MacLean
    University of Guelph, Ontario
  • A. Chester
    TRIUMF
  • Z. Beadle
    Reed College
  • 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
  • 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
  • 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
  • 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
  • C. E. Svensson
    University of Guelph, Ontario
  • S. W. Yates
    University of Kentucky
  • J.K. Smith
    TRIUMF
  • S.J. Williams
    Michigan State University
The β
− decay of 47K to 47Ca is an appropriate mechanism for benchmarking interactions spanning
the sd and pf shells, but current knowledge of the β
−-decay scheme is limited. We have performed
a high-resolution, high-efficiency study of the β
−-decay of 47K with the GRIFFIN spectrometer at
TRIUMF-ISAC. The study revealed 48 new transitions, a more precise value for the 47K half-life
(17.38(3) s), and new spin and parity assignments for eight excited states. Levels placed for the
first time here raise the highest state observed in β
− decay to within 568(3) keV of the Q-value and
confirm the previously measured large β
−-decay branching ratios to the low-lying states. Previously
unobserved β
−-feeding to 3/2+ states between 4.5 and 6.1 MeV excitation energy was identified with
a total β
−-feeding intensity of 1.29(2)%. The sum of the B(GT) values for these states indicates that
the 1s1/2 proton hole strength near this excitation energy is comparable to the previously known
1s1/2 proton and neutron hole strengths near 2.6 MeV
Iaith wreiddiolSaesneg
Tudalennau (o-i)054314
Nifer y tudalennau1
CyfnodolynPhysical Review C
Cyfrol102
Rhif y cyfnodolyn5
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 11 Tach 2020
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