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

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

doi:10.1103/PhysRevC.100.054327

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

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

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Abstract

We report on high-statistics data from the β- decay of the K46Jπ=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 Ca46 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 language	English
Article number	054327
Journal	Physical Review C
Volume	100
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevC.100.054327
State	Published - Nov 25 2019

Bibliographical note

Funding Information:
We thank the operations and beam delivery staff at TRIUMF for providing the radioactive beam. The GRIFFIN spectrometer was jointly funded by the Canadian Foundation for Innovation (CFI), TRIUMF, and the University of Guelph. TRIUMF receives federal funding via a contribution agreement through the National Research Council Canada (NRC). C.E.S. acknowledges support from the Canada Research Chairs program. This work was supported in part by the Natural Sciences and Engineering Research Council of Canada (NSERC). This material is based upon work supported by the US National Science Foundation under Grant No. PHY-1913028.

Publisher Copyright:
© 2019 American Physical Society.

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevC.100.054327

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Pore, J. L., Andreoiu, C., Smith, J. K., Maclean, A. D., Chester, A., Holt, J. D., Ball, G. C., Bender, P. C., Bildstein, V., Braid, R., Diaz Varela, A., Dunlop, R., Evitts, L. J., Garnsworthy, A. B., Garrett, P. E., Hackman, G., Ilyushkin, S. V., Jigmeddorj, B., Kuhn, K., ... Yates, S. W. (2019). Detailed spectroscopy of Ca 46: A study of the β- Decay of K 46. Physical Review C, 100(5), [054327]. https://doi.org/10.1103/PhysRevC.100.054327

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title = "Detailed spectroscopy of Ca 46: A study of the β- Decay of K 46",

abstract = "We report on high-statistics data from the β- decay of the K46Jπ=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 Ca46 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.",

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

note = "Funding Information: We thank the operations and beam delivery staff at TRIUMF for providing the radioactive beam. The GRIFFIN spectrometer was jointly funded by the Canadian Foundation for Innovation (CFI), TRIUMF, and the University of Guelph. TRIUMF receives federal funding via a contribution agreement through the National Research Council Canada (NRC). C.E.S. acknowledges support from the Canada Research Chairs program. This work was supported in part by the Natural Sciences and Engineering Research Council of Canada (NSERC). This material is based upon work supported by the US National Science Foundation under Grant No. PHY-1913028. Publisher Copyright: {\textcopyright} 2019 American Physical Society.",

year = "2019",

month = nov,

day = "25",

doi = "10.1103/PhysRevC.100.054327",

language = "English",

volume = "100",

number = "5",

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Pore, JL, Andreoiu, C, Smith, JK, Maclean, AD, Chester, A, Holt, JD, Ball, GC, Bender, PC, Bildstein, V, Braid, R, Diaz Varela, A, Dunlop, R, Evitts, LJ, Garnsworthy, AB, Garrett, PE, Hackman, G, Ilyushkin, SV, Jigmeddorj, B, Kuhn, K, Kunz, P, Laffoley, AT, Leach, KG, Miller, D, Mills, WJ, Moore, W, Moukaddam, M, Morrison, LN, Olaizola, B, Peters, EE, Radich, AJ, Rand, ET, Sarazin, F, Southall, D, Svensson, CE, Williams, SJ & Yates, SW 2019, 'Detailed spectroscopy of Ca 46: A study of the β- Decay of K 46', Physical Review C, vol. 100, no. 5, 054327. https://doi.org/10.1103/PhysRevC.100.054327

TY - JOUR

T1 - Detailed spectroscopy of Ca 46

T2 - A study of the β- Decay of K 46

AU - Pore, J. L.

AU - Andreoiu, C.

AU - Smith, J. K.

AU - Maclean, A. D.

AU - Chester, A.

AU - Holt, J. D.

AU - Ball, G. C.

AU - Bender, P. C.

AU - Bildstein, V.

AU - Braid, R.

AU - Diaz Varela, A.

AU - Dunlop, R.

AU - Evitts, L. J.

AU - Garnsworthy, A. B.

AU - Garrett, P. E.

AU - Hackman, G.

AU - Ilyushkin, S. V.

AU - Jigmeddorj, B.

AU - Kuhn, K.

AU - Kunz, P.

AU - Laffoley, A. T.

AU - Leach, K. G.

AU - Miller, D.

AU - Mills, W. J.

AU - Moore, W.

AU - Moukaddam, M.

AU - Morrison, L. N.

AU - Olaizola, B.

AU - Peters, E. E.

AU - Radich, A. J.

AU - Rand, E. T.

AU - Sarazin, F.

AU - Southall, D.

AU - Svensson, C. E.

AU - Williams, S. J.

AU - Yates, S. W.

N1 - Funding Information: We thank the operations and beam delivery staff at TRIUMF for providing the radioactive beam. The GRIFFIN spectrometer was jointly funded by the Canadian Foundation for Innovation (CFI), TRIUMF, and the University of Guelph. TRIUMF receives federal funding via a contribution agreement through the National Research Council Canada (NRC). C.E.S. acknowledges support from the Canada Research Chairs program. This work was supported in part by the Natural Sciences and Engineering Research Council of Canada (NSERC). This material is based upon work supported by the US National Science Foundation under Grant No. PHY-1913028. Publisher Copyright: © 2019 American Physical Society.

PY - 2019/11/25

Y1 - 2019/11/25

N2 - We report on high-statistics data from the β- decay of the K46Jπ=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 Ca46 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.

AB - We report on high-statistics data from the β- decay of the K46Jπ=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 Ca46 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.

UR - http://www.scopus.com/inward/record.url?scp=85075778601&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85075778601&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.100.054327

DO - 10.1103/PhysRevC.100.054327

M3 - Article

AN - SCOPUS:85075778601

VL - 100

IS - 5

M1 - 054327

ER -

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

Abstract

Bibliographical note

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