Refined Topology of the 𝑁=20 Island of Inversion with High Precision Mass Measurements of 31−33Na and 31−35Mg

E. M. Lykiardopoulou; C. Walls; J. Bergmann; M. Brodeur; C. Brown; J. Cardona; A. Czihaly; T. Dickel; T. Duguet; J. -P. Ebran; M. Frosini; Z. Hockenbery; J. D. Holt; A. Jacobs; S. Kakkar; B. Kootte; T. Miyagi; A. Mollaebrahimi; T. Murboeck; P. Navratil; T. Otsuka; W. R. Plaß; S. Paul; W. S. Porter; M. P. Reiter; A. Scalesi; C. Scheidenberger; V. Somà; N. Shimizu; Y. Wang; D. Lunney; J. Dilling; A. A. Kwiatkowski

doi:10.1103/PhysRevLett.134.052503

Refined Topology of the 𝑁=20 Island of Inversion with High Precision Mass Measurements of 31−33Na and 31−35Mg

E. M. Lykiardopoulou, C. Walls, J. Bergmann, M. Brodeur, C. Brown, J. Cardona, A. Czihaly, T. Dickel, T. Duguet, J. -P. Ebran, M. Frosini, Z. Hockenbery, J. D. Holt, A. Jacobs, S. Kakkar, B. Kootte, T. Miyagi, A. Mollaebrahimi, T. Murboeck, P. NavratilT. Otsuka, W. R. Plaß, S. Paul, W. S. Porter, M. P. Reiter, A. Scalesi, C. Scheidenberger, V. Somà, N. Shimizu, Y. Wang, D. Lunney, J. Dilling, A. A. Kwiatkowski

School of Physics and Astronomy

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

Abstract

Mass measurements of 31–33Na and 31–35Mg using the TITAN MR-TOF-MS at TRIUMF’s ISAC facility are presented, with the uncertainty of the 33Na mass reduced by over 2 orders of magnitude. The excellent performance of the MR-TOF-MS has also allowed the discovery of a millisecond isomer in 32Na. The precision obtained shows that the binding energy of the normally closed 𝑁 =20 neutron shell reaches a minimum for 32Mg but increases significantly for 31Na, hinting at the possibility of enhanced shell strength toward the unbound 28O. We compare the results with new ab initio predictions that raise intriguing questions of nuclear structure beyond the dripline.

Original language	English
Article number	052503
Pages (from-to)	1-8
Number of pages	8
Journal	Physical Review Letters
Volume	134
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevLett.134.052503
Publication status	Published - 7 Feb 2025

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10.1103/PhysRevLett.134.052503

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Lykiardopoulou, E. M., Walls, C., Bergmann, J., Brodeur, M., Brown, C., Cardona, J., Czihaly, A., Dickel, T., Duguet, T., Ebran, J. .-P., Frosini, M., Hockenbery, Z., Holt, J. D., Jacobs, A., Kakkar, S., Kootte, B., Miyagi, T., Mollaebrahimi, A., Murboeck, T., ... Kwiatkowski, A. A. (2025). Refined Topology of the 𝑁=20 Island of Inversion with High Precision Mass Measurements of 31−33Na and 31−35Mg. Physical Review Letters, 134(5), 1-8. Article 052503. https://doi.org/10.1103/PhysRevLett.134.052503

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title = "Refined Topology of the 𝑁=20 Island of Inversion with High Precision Mass Measurements of 31−33Na and 31−35Mg",

abstract = "Mass measurements of 31–33Na and 31–35Mg using the TITAN MR-TOF-MS at TRIUMF{\textquoteright}s ISAC facility are presented, with the uncertainty of the 33Na mass reduced by over 2 orders of magnitude. The excellent performance of the MR-TOF-MS has also allowed the discovery of a millisecond isomer in 32Na. The precision obtained shows that the binding energy of the normally closed 𝑁 =20 neutron shell reaches a minimum for 32Mg but increases significantly for 31Na, hinting at the possibility of enhanced shell strength toward the unbound 28O. We compare the results with new ab initio predictions that raise intriguing questions of nuclear structure beyond the dripline.",

author = "Lykiardopoulou, {E. M.} and C. Walls and J. Bergmann and M. Brodeur and C. Brown and J. Cardona and A. Czihaly and T. Dickel and T. Duguet and Ebran, {J. -P.} and M. Frosini and Z. Hockenbery and Holt, {J. D.} and A. Jacobs and S. Kakkar and B. Kootte and T. Miyagi and A. Mollaebrahimi and T. Murboeck and P. Navratil and T. Otsuka and Pla{\ss}, {W. R.} and S. Paul and Porter, {W. S.} and Reiter, {M. P.} and A. Scalesi and C. Scheidenberger and V. Som{\`a} and N. Shimizu and Y. Wang and D. Lunney and J. Dilling and Kwiatkowski, {A. A.}",

year = "2025",

month = feb,

day = "7",

doi = "10.1103/PhysRevLett.134.052503",

language = "English",

volume = "134",

pages = "1--8",

journal = "Physical Review Letters",

issn = "0031-9007",

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Lykiardopoulou, EM, Walls, C, Bergmann, J, Brodeur, M, Brown, C, Cardona, J, Czihaly, A, Dickel, T, Duguet, T, Ebran, J-P, Frosini, M, Hockenbery, Z, Holt, JD, Jacobs, A, Kakkar, S, Kootte, B, Miyagi, T, Mollaebrahimi, A, Murboeck, T, Navratil, P, Otsuka, T, Plaß, WR, Paul, S, Porter, WS, Reiter, MP, Scalesi, A, Scheidenberger, C, Somà, V, Shimizu, N, Wang, Y, Lunney, D, Dilling, J & Kwiatkowski, AA 2025, 'Refined Topology of the 𝑁=20 Island of Inversion with High Precision Mass Measurements of 31−33Na and 31−35Mg', Physical Review Letters, vol. 134, no. 5, 052503, pp. 1-8. https://doi.org/10.1103/PhysRevLett.134.052503

TY - JOUR

T1 - Refined Topology of the 𝑁=20 Island of Inversion with High Precision Mass Measurements of 31−33Na and 31−35Mg

AU - Lykiardopoulou, E. M.

AU - Walls, C.

AU - Bergmann, J.

AU - Brodeur, M.

AU - Brown, C.

AU - Cardona, J.

AU - Czihaly, A.

AU - Dickel, T.

AU - Duguet, T.

AU - Ebran, J. -P.

AU - Frosini, M.

AU - Hockenbery, Z.

AU - Holt, J. D.

AU - Jacobs, A.

AU - Kakkar, S.

AU - Kootte, B.

AU - Miyagi, T.

AU - Mollaebrahimi, A.

AU - Murboeck, T.

AU - Navratil, P.

AU - Otsuka, T.

AU - Plaß, W. R.

AU - Paul, S.

AU - Porter, W. S.

AU - Reiter, M. P.

AU - Scalesi, A.

AU - Scheidenberger, C.

AU - Somà, V.

AU - Shimizu, N.

AU - Wang, Y.

AU - Lunney, D.

AU - Dilling, J.

AU - Kwiatkowski, A. A.

PY - 2025/2/7

Y1 - 2025/2/7

N2 - Mass measurements of 31–33Na and 31–35Mg using the TITAN MR-TOF-MS at TRIUMF’s ISAC facility are presented, with the uncertainty of the 33Na mass reduced by over 2 orders of magnitude. The excellent performance of the MR-TOF-MS has also allowed the discovery of a millisecond isomer in 32Na. The precision obtained shows that the binding energy of the normally closed 𝑁 =20 neutron shell reaches a minimum for 32Mg but increases significantly for 31Na, hinting at the possibility of enhanced shell strength toward the unbound 28O. We compare the results with new ab initio predictions that raise intriguing questions of nuclear structure beyond the dripline.

AB - Mass measurements of 31–33Na and 31–35Mg using the TITAN MR-TOF-MS at TRIUMF’s ISAC facility are presented, with the uncertainty of the 33Na mass reduced by over 2 orders of magnitude. The excellent performance of the MR-TOF-MS has also allowed the discovery of a millisecond isomer in 32Na. The precision obtained shows that the binding energy of the normally closed 𝑁 =20 neutron shell reaches a minimum for 32Mg but increases significantly for 31Na, hinting at the possibility of enhanced shell strength toward the unbound 28O. We compare the results with new ab initio predictions that raise intriguing questions of nuclear structure beyond the dripline.

U2 - 10.1103/PhysRevLett.134.052503

DO - 10.1103/PhysRevLett.134.052503

M3 - Article

SN - 0031-9007

VL - 134

SP - 1

EP - 8

JO - Physical Review Letters

JF - Physical Review Letters

IS - 5

M1 - 052503

ER -

Refined Topology of the 𝑁=20 Island of Inversion with High Precision Mass Measurements of 31−33Na and 31−35Mg

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