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

A. B. Garnsworthy; J. L. Pore; C. Andreoiu; A. D. MacLean; A. Chester; Z. Beadle; G. C. Ball; P. C. Bender; V. Bildstein; R. Braid; A. Diaz Varela; R. Dunlop; L. J. Evitts; P. E. Garrett; G. Hackman; S. V. Ilyushkin; B. Jigmeddorj; K. Kuhn; A. T. Laffoley; K. G. Leach; D. Miller; W. J. Mills; W. Moore; M. Moukaddam; B. Olaizola; E. E. Peters; A. J. Radich; E. T. Rand; F. Sarazin; C. E. Svensson; S. W. Yates; J.K. Smith; S.J. Williams

doi:10.1103/PhysRevC.102.054314

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

A. B. Garnsworthy, J. L. Pore, C. Andreoiu, A. D. MacLean, A. Chester, Z. Beadle, G. C. Ball, P. C. Bender, V. Bildstein, R. Braid, A. Diaz Varela, R. Dunlop, L. J. Evitts, P. E. Garrett, G. Hackman, S. V. Ilyushkin, B. Jigmeddorj, K. Kuhn, A. T. Laffoley, K. G. LeachD. Miller, W. J. Mills, W. Moore, M. Moukaddam, B. Olaizola, E. E. Peters, A. J. Radich, E. T. Rand, F. Sarazin, C. E. Svensson, S. W. Yates, J.K. Smith, S.J. Williams

School of Computer Science & Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

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

Original language	English
Pages (from-to)	054314
Number of pages	1
Journal	Physical Review C
Volume	102
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevC.102.054314
Publication status	Published - 11 Nov 2020

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https://arxiv.org/pdf/2010.15878Licence: CC BY

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Garnsworthy, A. B., Pore, J. L., Andreoiu, C., MacLean, A. D., Chester, A., Beadle, Z., Ball, G. C., Bender, P. C., Bildstein, V., Braid, R., Varela, A. D., Dunlop, R., Evitts, L. J., Garrett, P. E., Hackman, G., Ilyushkin, S. V., Jigmeddorj, B., Kuhn, K., Laffoley, A. T., ... Williams, S. J. (2020). Spectroscopic study of Ca-47 from the beta(-) decay of K-47. Physical Review C, 102(5), 054314. https://doi.org/10.1103/PhysRevC.102.054314

@article{c8e87a194835459b9b8bc334f16a1957,

title = "Spectroscopic study of Ca-47 from the beta(-) decay of K-47",

abstract = "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",

author = "Garnsworthy, \{A. B.\} and Pore, \{J. L.\} and C. Andreoiu and MacLean, \{A. D.\} and A. Chester and Z. Beadle and Ball, \{G. C.\} and Bender, \{P. C.\} and V. Bildstein and R. Braid and Varela, \{A. Diaz\} and R. Dunlop and Evitts, \{L. J.\} and Garrett, \{P. E.\} and G. Hackman and Ilyushkin, \{S. V.\} and B. Jigmeddorj and K. Kuhn and Laffoley, \{A. T.\} and Leach, \{K. G.\} and D. Miller and Mills, \{W. J.\} and W. Moore and M. Moukaddam and B. Olaizola and Peters, \{E. E.\} and Radich, \{A. J.\} and Rand, \{E. T.\} and F. Sarazin and Svensson, \{C. E.\} and Yates, \{S. W.\} and J.K. Smith and S.J. Williams",

year = "2020",

month = nov,

day = "11",

doi = "10.1103/PhysRevC.102.054314",

language = "English",

volume = "102",

pages = "054314",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "5",

}

Garnsworthy, AB, Pore, JL, Andreoiu, C, MacLean, AD, Chester, A, Beadle, Z, Ball, GC, Bender, PC, Bildstein, V, Braid, R, Varela, AD, Dunlop, R, Evitts, LJ, Garrett, PE, Hackman, G, Ilyushkin, SV, Jigmeddorj, B, Kuhn, K, Laffoley, AT, Leach, KG, Miller, D, Mills, WJ, Moore, W, Moukaddam, M, Olaizola, B, Peters, EE, Radich, AJ, Rand, ET, Sarazin, F, Svensson, CE, Yates, SW, Smith, JK & Williams, SJ 2020, 'Spectroscopic study of Ca-47 from the beta(-) decay of K-47', Physical Review C, vol. 102, no. 5, pp. 054314. https://doi.org/10.1103/PhysRevC.102.054314

TY - JOUR

T1 - Spectroscopic study of Ca-47 from the beta(-) decay of K-47

AU - Garnsworthy, A. B.

AU - Pore, J. L.

AU - Andreoiu, C.

AU - MacLean, A. D.

AU - Chester, A.

AU - Beadle, Z.

AU - Ball, G. C.

AU - Bender, P. C.

AU - Bildstein, V.

AU - Braid, R.

AU - Varela, A. Diaz

AU - Dunlop, R.

AU - Evitts, L. J.

AU - Garrett, P. E.

AU - Hackman, G.

AU - Ilyushkin, S. V.

AU - Jigmeddorj, B.

AU - Kuhn, K.

AU - Laffoley, A. T.

AU - Leach, K. G.

AU - Miller, D.

AU - Mills, W. J.

AU - Moore, W.

AU - Moukaddam, M.

AU - Olaizola, B.

AU - Peters, E. E.

AU - Radich, A. J.

AU - Rand, E. T.

AU - Sarazin, F.

AU - Svensson, C. E.

AU - Yates, S. W.

AU - Smith, J.K.

AU - Williams, S.J.

PY - 2020/11/11

Y1 - 2020/11/11

N2 - 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

AB - 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

U2 - 10.1103/PhysRevC.102.054314

DO - 10.1103/PhysRevC.102.054314

M3 - Article

SN - 2469-9985

VL - 102

SP - 054314

JO - Physical Review C

JF - Physical Review C

IS - 5

ER -

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

Abstract

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