Spectroscopic study of Ca 47 from the β- Decay of K 47

J. K. Smith; 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. J. Williams; S. W. Yates

doi:10.1103/PhysRevC.102.054314

Spectroscopic study of Ca 47 from the β- Decay of K 47

J. K. Smith, 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. LaffoleyK. 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. J. Williams, S. W. Yates

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Abstract

The β- decay of K47 to Ca47 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 K47 with the GRIFFIN spectrometer at TRIUMF-ISAC. The study revealed 48 new transitions, a more precise value for the K47 half-life [17.38(3) s], and new spin and parity assignments for 8 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
Article number	054314
Journal	Physical Review C
Volume	102
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevC.102.054314
State	Published - Nov 11 2020

Bibliographical note

Publisher Copyright:
© 2020 American Physical Society.

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevC.102.054314

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Smith, J. K., 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., ... Yates, S. W. (2020). Spectroscopic study of Ca 47 from the β- Decay of K 47. Physical Review C, 102(5), Article 054314. https://doi.org/10.1103/PhysRevC.102.054314

@article{819f6f50282e4607865694d76d671a48,

title = "Spectroscopic study of Ca 47 from the β- Decay of K 47",

abstract = "The β- decay of K47 to Ca47 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 K47 with the GRIFFIN spectrometer at TRIUMF-ISAC. The study revealed 48 new transitions, a more precise value for the K47 half-life [17.38(3) s], and new spin and parity assignments for 8 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 = "Smith, {J. K.} and 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 Williams, {S. J.} and Yates, {S. W.}",

note = "Publisher Copyright: {\textcopyright} 2020 American Physical Society. ",

year = "2020",

month = nov,

day = "11",

doi = "10.1103/PhysRevC.102.054314",

language = "English",

volume = "102",

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Smith, JK, 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, Williams, SJ & Yates, SW 2020, 'Spectroscopic study of Ca 47 from the β- Decay of K 47', Physical Review C, vol. 102, no. 5, 054314. https://doi.org/10.1103/PhysRevC.102.054314

TY - JOUR

T1 - Spectroscopic study of Ca 47 from the β- Decay of K 47

AU - Smith, J. K.

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 - Williams, S. J.

AU - Yates, S. W.

PY - 2020/11/11

Y1 - 2020/11/11

N2 - The β- decay of K47 to Ca47 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 K47 with the GRIFFIN spectrometer at TRIUMF-ISAC. The study revealed 48 new transitions, a more precise value for the K47 half-life [17.38(3) s], and new spin and parity assignments for 8 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 K47 to Ca47 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 K47 with the GRIFFIN spectrometer at TRIUMF-ISAC. The study revealed 48 new transitions, a more precise value for the K47 half-life [17.38(3) s], and new spin and parity assignments for 8 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.

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U2 - 10.1103/PhysRevC.102.054314

DO - 10.1103/PhysRevC.102.054314

M3 - Article

AN - SCOPUS:85096086000

SN - 2469-9985

VL - 102

JO - Physical Review C

JF - Physical Review C

IS - 5

M1 - 054314

ER -

Spectroscopic study of Ca 47 from the β- Decay of K 47

Abstract

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