Coulomb excitation of the ΙTzΙ=½, A=23 mirror pair

J. Henderson; G. Hackman; P. Ruotsalainen; J. D. Holt; S. R. Stroberg; C. Andreoiu; G. C. Ball; N. Bernier; M. Bowry; R. Caballero-Folch; S. Cruz; A. Diaz Varela; L. J. Evitts; R. Frederick; A. B. Garnsworthy; M. Holl; J. Lassen; J. Measures; B. Olaizola; E. O'Sullivan; O. Paetkau; J. Park; J. Smallcombe; C. E. Svensson; K. Whitmore; C. Y. Wu

doi:10.1103/PhysRevC.105.034332

Coulomb excitation of the ΙT_zΙ=½, A=23 mirror pair

J. Henderson^*, G. Hackman, P. Ruotsalainen, J. D. Holt, S. R. Stroberg, C. Andreoiu, G. C. Ball, N. Bernier, M. Bowry, R. Caballero-Folch, S. Cruz, A. Diaz Varela, L. J. Evitts, R. Frederick, A. B. Garnsworthy, M. Holl, J. Lassen, J. Measures, B. Olaizola, E. O'SullivanO. Paetkau, J. Park, J. Smallcombe, C. E. Svensson, K. Whitmore, C. Y. Wu

^*Corresponding author for this work

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

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Abstract

Background: Electric-quadrupole (E2) strengths relate to the underlying quadrupole deformation of a nucleus and present a challenge for many nuclear theories. Mirror nuclei in the vicinity of the line of N = Z represent a convenient laboratory for testing deficiencies in such models, making use of the isospin symmetry of the systems.

Purpose: Uncertainties associated with literature E2 strengths in ²³Mg are some of the largest in T_z = ∣ ½ ∣ nuclei in the sd shell. The purpose of the present paper is to improve the precision with which these values are known, to enable better comparison with theoretical models.

Methods: Coulomb-excitation measurements of ²³Mg and ²³Na were performed at the TRIUMF-ISAC facility using the TIGRESS spectrometer. They were used to determine the E2 matrix elements of mixed E2/M1 transitions.

Results: Reduced E2 transition strengths, B(E2) , were extracted for ²³Mg and ²³Na . Their precision was improved by factors of approximately 6 for both isotopes, while agreeing within uncertainties with previous measurements.

Conclusions: A comparison was made with both shell-model and ab initio valence-space in-medium similarity renormalization group calculations. Valence-space in-medium similarity renormalization group calculations were found to underpredict the absolute E2 strength, in agreement with previous studies.

Original language	English
Article number	034332
Journal	Physical Review C
Volume	105
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevC.105.034332
Publication status	Published - 28 Mar 2022
Externally published	Yes

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2022 03 17 Henderson et al Coulomb acceptedAccepted author manuscript, 921 KB

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Henderson, J., Hackman, G., Ruotsalainen, P., Holt, J. D., Stroberg, S. R., Andreoiu, C., Ball, G. C., Bernier, N., Bowry, M., Caballero-Folch, R., Cruz, S., Varela, A. D., Evitts, L. J., Frederick, R., Garnsworthy, A. B., Holl, M., Lassen, J., Measures, J., Olaizola, B., ... Wu, C. Y. (2022). Coulomb excitation of the ΙT_zΙ=½, A=23 mirror pair. Physical Review C, 105(3), Article 034332. https://doi.org/10.1103/PhysRevC.105.034332

@article{a13e8006aa144544a887e0adf43434c5,

title = "Coulomb excitation of the ΙTzΙ=½, A=23 mirror pair",

abstract = "Background: Electric-quadrupole (E2) strengths relate to the underlying quadrupole deformation of a nucleus and present a challenge for many nuclear theories. Mirror nuclei in the vicinity of the line of N = Z represent a convenient laboratory for testing deficiencies in such models, making use of the isospin symmetry of the systems. Purpose: Uncertainties associated with literature E2 strengths in 23Mg are some of the largest in Tz = ∣ ½ ∣ nuclei in the sd shell. The purpose of the present paper is to improve the precision with which these values are known, to enable better comparison with theoretical models. Methods: Coulomb-excitation measurements of 23Mg and 23Na were performed at the TRIUMF-ISAC facility using the TIGRESS spectrometer. They were used to determine the E2 matrix elements of mixed E2/M1 transitions. Results: Reduced E2 transition strengths, B(E2) , were extracted for 23Mg and 23Na . Their precision was improved by factors of approximately 6 for both isotopes, while agreeing within uncertainties with previous measurements. Conclusions: A comparison was made with both shell-model and ab initio valence-space in-medium similarity renormalization group calculations. Valence-space in-medium similarity renormalization group calculations were found to underpredict the absolute E2 strength, in agreement with previous studies.",

author = "J. Henderson and G. Hackman and P. Ruotsalainen and Holt, {J. D.} and Stroberg, {S. R.} and C. Andreoiu and Ball, {G. C.} and N. Bernier and M. Bowry and R. Caballero-Folch and S. Cruz and Varela, {A. Diaz} and Evitts, {L. J.} and R. Frederick and Garnsworthy, {A. B.} and M. Holl and J. Lassen and J. Measures and B. Olaizola and E. O'Sullivan and O. Paetkau and J. Park and J. Smallcombe and Svensson, {C. E.} and K. Whitmore and Wu, {C. Y.}",

year = "2022",

month = mar,

day = "28",

doi = "10.1103/PhysRevC.105.034332",

language = "English",

volume = "105",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "3",

}

Henderson, J, Hackman, G, Ruotsalainen, P, Holt, JD, Stroberg, SR, Andreoiu, C, Ball, GC, Bernier, N, Bowry, M, Caballero-Folch, R, Cruz, S, Varela, AD, Evitts, LJ, Frederick, R, Garnsworthy, AB, Holl, M, Lassen, J, Measures, J, Olaizola, B, O'Sullivan, E, Paetkau, O, Park, J, Smallcombe, J, Svensson, CE, Whitmore, K & Wu, CY 2022, 'Coulomb excitation of the ΙT_zΙ=½, A=23 mirror pair', Physical Review C, vol. 105, no. 3, 034332. https://doi.org/10.1103/PhysRevC.105.034332

TY - JOUR

T1 - Coulomb excitation of the ΙTzΙ=½, A=23 mirror pair

AU - Henderson, J.

AU - Hackman, G.

AU - Ruotsalainen, P.

AU - Holt, J. D.

AU - Stroberg, S. R.

AU - Andreoiu, C.

AU - Ball, G. C.

AU - Bernier, N.

AU - Bowry, M.

AU - Caballero-Folch, R.

AU - Cruz, S.

AU - Varela, A. Diaz

AU - Evitts, L. J.

AU - Frederick, R.

AU - Garnsworthy, A. B.

AU - Holl, M.

AU - Lassen, J.

AU - Measures, J.

AU - Olaizola, B.

AU - O'Sullivan, E.

AU - Paetkau, O.

AU - Park, J.

AU - Smallcombe, J.

AU - Svensson, C. E.

AU - Whitmore, K.

AU - Wu, C. Y.

PY - 2022/3/28

Y1 - 2022/3/28

N2 - Background: Electric-quadrupole (E2) strengths relate to the underlying quadrupole deformation of a nucleus and present a challenge for many nuclear theories. Mirror nuclei in the vicinity of the line of N = Z represent a convenient laboratory for testing deficiencies in such models, making use of the isospin symmetry of the systems. Purpose: Uncertainties associated with literature E2 strengths in 23Mg are some of the largest in Tz = ∣ ½ ∣ nuclei in the sd shell. The purpose of the present paper is to improve the precision with which these values are known, to enable better comparison with theoretical models. Methods: Coulomb-excitation measurements of 23Mg and 23Na were performed at the TRIUMF-ISAC facility using the TIGRESS spectrometer. They were used to determine the E2 matrix elements of mixed E2/M1 transitions. Results: Reduced E2 transition strengths, B(E2) , were extracted for 23Mg and 23Na . Their precision was improved by factors of approximately 6 for both isotopes, while agreeing within uncertainties with previous measurements. Conclusions: A comparison was made with both shell-model and ab initio valence-space in-medium similarity renormalization group calculations. Valence-space in-medium similarity renormalization group calculations were found to underpredict the absolute E2 strength, in agreement with previous studies.

AB - Background: Electric-quadrupole (E2) strengths relate to the underlying quadrupole deformation of a nucleus and present a challenge for many nuclear theories. Mirror nuclei in the vicinity of the line of N = Z represent a convenient laboratory for testing deficiencies in such models, making use of the isospin symmetry of the systems. Purpose: Uncertainties associated with literature E2 strengths in 23Mg are some of the largest in Tz = ∣ ½ ∣ nuclei in the sd shell. The purpose of the present paper is to improve the precision with which these values are known, to enable better comparison with theoretical models. Methods: Coulomb-excitation measurements of 23Mg and 23Na were performed at the TRIUMF-ISAC facility using the TIGRESS spectrometer. They were used to determine the E2 matrix elements of mixed E2/M1 transitions. Results: Reduced E2 transition strengths, B(E2) , were extracted for 23Mg and 23Na . Their precision was improved by factors of approximately 6 for both isotopes, while agreeing within uncertainties with previous measurements. Conclusions: A comparison was made with both shell-model and ab initio valence-space in-medium similarity renormalization group calculations. Valence-space in-medium similarity renormalization group calculations were found to underpredict the absolute E2 strength, in agreement with previous studies.

U2 - 10.1103/PhysRevC.105.034332

DO - 10.1103/PhysRevC.105.034332

M3 - Article

SN - 2469-9985

VL - 105

JO - Physical Review C

JF - Physical Review C

IS - 3

M1 - 034332

ER -

Coulomb excitation of the ΙTzΙ=½, A=23 mirror pair

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Coulomb excitation of the ΙT_zΙ=½, A=23 mirror pair