Isospin symmetry in B(E2) values: Coulomb excitation study of Mg 21

P. Ruotsalainen; J. Henderson; G. Hackman; G. H. Sargsyan; K. D. Launey; A. Saxena; P. C. Srivastava; S. R. Stroberg; T. Grahn; J. Pakarinen; G. C. Ball; R. Julin; P. T. Greenlees; J. Smallcombe; C. Andreoiu; N. Bernier; M. Bowry; M. Buckner; R. Caballero-Folch; A. Chester; S. Cruz; L. J. Evitts; R. Frederick; A. B. Garnsworthy; M. Holl; A. Kurkjian; D. Kisliuk; K. G. Leach; E. McGee; J. Measures; D. Mücher; J. Park; F. Sarazin; J. K. Smith; D. Southall; K. Starosta; C. E. Svensson; K. Whitmore; M. Williams; C. Y. Wu

doi:10.1103/PhysRevC.99.051301

Isospin symmetry in B(E2) values: Coulomb excitation study of Mg 21

P. Ruotsalainen, J. Henderson, G. Hackman, G. H. Sargsyan, K. D. Launey, A. Saxena, P. C. Srivastava, S. R. Stroberg, T. Grahn, J. Pakarinen, G. C. Ball, R. Julin, P. T. Greenlees, J. Smallcombe, C. Andreoiu, N. Bernier, M. Bowry, M. Buckner, R. Caballero-Folch, A. ChesterS. Cruz, L. J. Evitts, R. Frederick, A. B. Garnsworthy, M. Holl, A. Kurkjian, D. Kisliuk, K. G. Leach, E. McGee, J. Measures, D. Mücher, J. Park, F. Sarazin, J. K. Smith, D. Southall, K. Starosta, C. E. Svensson, K. Whitmore, M. Williams, C. Y. Wu

Physics and Astronomy

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Abstract

The Tz=-32 nucleus Mg21 has been studied by Coulomb excitation on Pt196 and Pd110 targets. A 205.6(1)-keV γ-ray transition resulting from the Coulomb excitation of the 52+ ground state to the first excited 12+ state in Mg21 was observed for the first time. Coulomb excitation cross-section measurements with both targets and a measurement of the half-life of the 12+ state yield an adopted value of B(E2;52+→12+)=13.3(4) W.u. A new excited state at 1672(1) keV with tentative 92+ assignment was also identified in Mg21. This work demonstrates a large difference in the B(E2;52+→12+) value between T=32, A=21 mirror nuclei. The difference is investigated in the shell-model framework employing both isospin conserving and breaking USD interactions and using modern ab initio nuclear structure calculations, which have recently become applicable in the sd shell.

Original language	English (US)
Article number	051301
Journal	Physical Review C
Volume	99
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevC.99.051301
State	Published - May 6 2019

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevC.99.051301

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Ruotsalainen, P., Henderson, J., Hackman, G., Sargsyan, G. H., Launey, K. D., Saxena, A., Srivastava, P. C., Stroberg, S. R., Grahn, T., Pakarinen, J., Ball, G. C., Julin, R., Greenlees, P. T., Smallcombe, J., Andreoiu, C., Bernier, N., Bowry, M., Buckner, M., Caballero-Folch, R., ... Wu, C. Y. (2019). Isospin symmetry in B(E2) values: Coulomb excitation study of Mg 21. Physical Review C, 99(5), Article 051301. https://doi.org/10.1103/PhysRevC.99.051301

@article{5fe7ac08b55d4d499020f31bffcab210,

title = "Isospin symmetry in B(E2) values: Coulomb excitation study of Mg 21",

abstract = "The Tz=-32 nucleus Mg21 has been studied by Coulomb excitation on Pt196 and Pd110 targets. A 205.6(1)-keV γ-ray transition resulting from the Coulomb excitation of the 52+ ground state to the first excited 12+ state in Mg21 was observed for the first time. Coulomb excitation cross-section measurements with both targets and a measurement of the half-life of the 12+ state yield an adopted value of B(E2;52+→12+)=13.3(4) W.u. A new excited state at 1672(1) keV with tentative 92+ assignment was also identified in Mg21. This work demonstrates a large difference in the B(E2;52+→12+) value between T=32, A=21 mirror nuclei. The difference is investigated in the shell-model framework employing both isospin conserving and breaking USD interactions and using modern ab initio nuclear structure calculations, which have recently become applicable in the sd shell.",

author = "P. Ruotsalainen and J. Henderson and G. Hackman and Sargsyan, {G. H.} and Launey, {K. D.} and A. Saxena and Srivastava, {P. C.} and Stroberg, {S. R.} and T. Grahn and J. Pakarinen and Ball, {G. C.} and R. Julin and Greenlees, {P. T.} and J. Smallcombe and C. Andreoiu and N. Bernier and M. Bowry and M. Buckner and R. Caballero-Folch and A. Chester and S. Cruz and Evitts, {L. J.} and R. Frederick and Garnsworthy, {A. B.} and M. Holl and A. Kurkjian and D. Kisliuk and Leach, {K. G.} and E. McGee and J. Measures and D. M{\"u}cher and J. Park and F. Sarazin and Smith, {J. K.} and D. Southall and K. Starosta and Svensson, {C. E.} and K. Whitmore and M. Williams and Wu, {C. Y.}",

note = "Funding Information: Acknowledgments. This work has been supported by the Natural Sciences and Engineering Research Council of Canada (NSERC), The Canada Foundation for Innovation and the British Columbia Knowledge Development Fund. TRIUMF receives federal funding via a contribution agreement through the National Research Council of Canada. The work at LLNL is under Contract No. DE-AC52-07NA27344. The work at JYFL-ACCLAB has been supported by the Academy of Finland under the Finnish Center of Excellence Programme (2012–2017). The work at Colorado School of Mines has been supported by the U.S. Department of Energy under Grant No. DE-SC0017649. This work has been partly supported by the U.S. National Science Foundation (OIA-1738287, ACI-1713690). This work benefited from computing resources provided by Blue Waters (supported by NSF OCI-0725070 and ACI-1238993, and the State of Illinois) and LSU ( www.hpc.lsu.edu ). Publisher Copyright: {\textcopyright} 2019 American Physical Society.",

year = "2019",

month = may,

day = "6",

doi = "10.1103/PhysRevC.99.051301",

language = "English (US)",

volume = "99",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "5",

}

Ruotsalainen, P, Henderson, J, Hackman, G, Sargsyan, GH, Launey, KD, Saxena, A, Srivastava, PC, Stroberg, SR, Grahn, T, Pakarinen, J, Ball, GC, Julin, R, Greenlees, PT, Smallcombe, J, Andreoiu, C, Bernier, N, Bowry, M, Buckner, M, Caballero-Folch, R, Chester, A, Cruz, S, Evitts, LJ, Frederick, R, Garnsworthy, AB, Holl, M, Kurkjian, A, Kisliuk, D, Leach, KG, McGee, E, Measures, J, Mücher, D, Park, J, Sarazin, F, Smith, JK, Southall, D, Starosta, K, Svensson, CE, Whitmore, K, Williams, M & Wu, CY 2019, 'Isospin symmetry in B(E2) values: Coulomb excitation study of Mg 21', Physical Review C, vol. 99, no. 5, 051301. https://doi.org/10.1103/PhysRevC.99.051301

TY - JOUR

T1 - Isospin symmetry in B(E2) values

T2 - Coulomb excitation study of Mg 21

AU - Ruotsalainen, P.

AU - Henderson, J.

AU - Hackman, G.

AU - Sargsyan, G. H.

AU - Launey, K. D.

AU - Saxena, A.

AU - Srivastava, P. C.

AU - Stroberg, S. R.

AU - Grahn, T.

AU - Pakarinen, J.

AU - Ball, G. C.

AU - Julin, R.

AU - Greenlees, P. T.

AU - Smallcombe, J.

AU - Andreoiu, C.

AU - Bernier, N.

AU - Bowry, M.

AU - Buckner, M.

AU - Caballero-Folch, R.

AU - Chester, A.

AU - Cruz, S.

AU - Evitts, L. J.

AU - Frederick, R.

AU - Garnsworthy, A. B.

AU - Holl, M.

AU - Kurkjian, A.

AU - Kisliuk, D.

AU - Leach, K. G.

AU - McGee, E.

AU - Measures, J.

AU - Mücher, D.

AU - Park, J.

AU - Sarazin, F.

AU - Smith, J. K.

AU - Southall, D.

AU - Starosta, K.

AU - Svensson, C. E.

AU - Whitmore, K.

AU - Williams, M.

AU - Wu, C. Y.

N1 - Funding Information: Acknowledgments. This work has been supported by the Natural Sciences and Engineering Research Council of Canada (NSERC), The Canada Foundation for Innovation and the British Columbia Knowledge Development Fund. TRIUMF receives federal funding via a contribution agreement through the National Research Council of Canada. The work at LLNL is under Contract No. DE-AC52-07NA27344. The work at JYFL-ACCLAB has been supported by the Academy of Finland under the Finnish Center of Excellence Programme (2012–2017). The work at Colorado School of Mines has been supported by the U.S. Department of Energy under Grant No. DE-SC0017649. This work has been partly supported by the U.S. National Science Foundation (OIA-1738287, ACI-1713690). This work benefited from computing resources provided by Blue Waters (supported by NSF OCI-0725070 and ACI-1238993, and the State of Illinois) and LSU ( www.hpc.lsu.edu ). Publisher Copyright: © 2019 American Physical Society.

PY - 2019/5/6

Y1 - 2019/5/6

N2 - The Tz=-32 nucleus Mg21 has been studied by Coulomb excitation on Pt196 and Pd110 targets. A 205.6(1)-keV γ-ray transition resulting from the Coulomb excitation of the 52+ ground state to the first excited 12+ state in Mg21 was observed for the first time. Coulomb excitation cross-section measurements with both targets and a measurement of the half-life of the 12+ state yield an adopted value of B(E2;52+→12+)=13.3(4) W.u. A new excited state at 1672(1) keV with tentative 92+ assignment was also identified in Mg21. This work demonstrates a large difference in the B(E2;52+→12+) value between T=32, A=21 mirror nuclei. The difference is investigated in the shell-model framework employing both isospin conserving and breaking USD interactions and using modern ab initio nuclear structure calculations, which have recently become applicable in the sd shell.

AB - The Tz=-32 nucleus Mg21 has been studied by Coulomb excitation on Pt196 and Pd110 targets. A 205.6(1)-keV γ-ray transition resulting from the Coulomb excitation of the 52+ ground state to the first excited 12+ state in Mg21 was observed for the first time. Coulomb excitation cross-section measurements with both targets and a measurement of the half-life of the 12+ state yield an adopted value of B(E2;52+→12+)=13.3(4) W.u. A new excited state at 1672(1) keV with tentative 92+ assignment was also identified in Mg21. This work demonstrates a large difference in the B(E2;52+→12+) value between T=32, A=21 mirror nuclei. The difference is investigated in the shell-model framework employing both isospin conserving and breaking USD interactions and using modern ab initio nuclear structure calculations, which have recently become applicable in the sd shell.

UR - http://www.scopus.com/inward/record.url?scp=85065614139&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85065614139&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.99.051301

DO - 10.1103/PhysRevC.99.051301

M3 - Article

AN - SCOPUS:85065614139

SN - 2469-9985

VL - 99

JO - Physical Review C

JF - Physical Review C

IS - 5

M1 - 051301

ER -

Isospin symmetry in B(E2) values: Coulomb excitation study of Mg 21

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