Mapping the N=40 island of inversion: Precision mass measurements of neutron-rich Fe isotopes

W. S. Porter; B. Ashrafkhani; J. Bergmann; C. Brown; T. Brunner; J. D. Cardona; D. Curien; I. Dedes; T. Dickel; J. Dudek; E. Dunling; G. Gwinner; Z. Hockenbery; J. D. Holt; C. Hornung; C. Izzo; A. Jacobs; A. Javaji; B. Kootte; G. Kripkó-Koncz; E. M. Lykiardopoulou; T. Miyagi; I. Mukul; T. Murböck; W. R. Plaß; M. P. Reiter; J. Ringuette; C. Scheidenberger; R. Silwal; C. Walls; H. L. Wang; Y. Wang; J. Yang; J. Dilling; A. A. Kwiatkowski

doi:10.1103/PhysRevC.105.L041301

Mapping the N=40 island of inversion: Precision mass measurements of neutron-rich Fe isotopes

W. S. Porter^*, B. Ashrafkhani, J. Bergmann, C. Brown, T. Brunner, J. D. Cardona, D. Curien, I. Dedes, T. Dickel, J. Dudek, E. Dunling, G. Gwinner, Z. Hockenbery, J. D. Holt, C. Hornung, C. Izzo, A. Jacobs, A. Javaji, B. Kootte, G. Kripkó-KonczE. M. Lykiardopoulou, T. Miyagi, I. Mukul, T. Murböck, W. R. Plaß, M. P. Reiter, J. Ringuette, C. Scheidenberger, R. Silwal, C. Walls, H. L. Wang, Y. Wang, J. Yang, J. Dilling, A. A. Kwiatkowski

^*Corresponding author for this work

School of Physics and Astronomy

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

Abstract

Nuclear properties across the chart of nuclides are key to improving and validating our understanding of the strong interaction in nuclear physics. We present high-precision mass measurements of neutron-rich Fe isotopes performed at the TITAN facility. The multiple-reflection time-of-flight mass spectrometer (MR-ToF-MS), achieving a resolving power greater than 600000 for the first time, enabled the measurement of 63–70Fe, including first-time high-precision direct measurements (δm/m≈10−7) of 68–70Fe, as well as the discovery of a long-lived isomeric state in 69Fe. These measurements are accompanied by both mean-field and ab initio calculations using the most recent realizations which enable theoretical assignment of the spin-parities of the 69Fe ground and isomeric states. Together with mean-field calculations of quadrupole deformation parameters for the Fe isotope chain, these results benchmark a maximum of deformation in the N=40 island of inversion in Fe and shed light on trends in level densities indicated in the newly refined mass surface.

Original language	English
Article number	L041301
Pages (from-to)	1-8
Number of pages	8
Journal	Physical Review C
Volume	105
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.105.L041301
Publication status	Published - 19 Apr 2022

Keywords / Materials (for Non-textual outputs)

nucl-ex
nucl-th

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10.1103/PhysRevC.105.L041301

2203.10141v1Accepted author manuscript, 749 KBLicence: Creative Commons: Attribution-NonCommercial-ShareAlike (CC BY-NC-SA)

https://arxiv.org/abs/2203.10141Licence: Creative Commons: Attribution-NonCommercial-ShareAlike (CC BY-NC-SA)

Edinburgh Nuclear Physics Group Consolidated Grant Proposal
Woods, P. (Principal Investigator), Aliotta, M. (Co-investigator), Lederer-Woods, C. (Co-investigator), Murphy, A. (Co-investigator) & Watts, D. (Co-investigator)
STFC
1/10/17 → 30/09/21
Project: Research

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Porter, W. S., Ashrafkhani, B., Bergmann, J., Brown, C., Brunner, T., Cardona, J. D., Curien, D., Dedes, I., Dickel, T., Dudek, J., Dunling, E., Gwinner, G., Hockenbery, Z., Holt, J. D., Hornung, C., Izzo, C., Jacobs, A., Javaji, A., Kootte, B., ... Kwiatkowski, A. A. (2022). Mapping the N=40 island of inversion: Precision mass measurements of neutron-rich Fe isotopes. Physical Review C, 105(4), 1-8. Article L041301. https://doi.org/10.1103/PhysRevC.105.L041301

@article{5464c19d259547ca95603256c87f8936,

title = "Mapping the N=40 island of inversion: Precision mass measurements of neutron-rich Fe isotopes",

abstract = "Nuclear properties across the chart of nuclides are key to improving and validating our understanding of the strong interaction in nuclear physics. We present high-precision mass measurements of neutron-rich Fe isotopes performed at the TITAN facility. The multiple-reflection time-of-flight mass spectrometer (MR-ToF-MS), achieving a resolving power greater than 600000 for the first time, enabled the measurement of 63–70Fe, including first-time high-precision direct measurements (δm/m≈10−7) of 68–70Fe, as well as the discovery of a long-lived isomeric state in 69Fe. These measurements are accompanied by both mean-field and ab initio calculations using the most recent realizations which enable theoretical assignment of the spin-parities of the 69Fe ground and isomeric states. Together with mean-field calculations of quadrupole deformation parameters for the Fe isotope chain, these results benchmark a maximum of deformation in the N=40 island of inversion in Fe and shed light on trends in level densities indicated in the newly refined mass surface.",

keywords = "nucl-ex, nucl-th",

author = "Porter, {W. S.} and B. Ashrafkhani and J. Bergmann and C. Brown and T. Brunner and Cardona, {J. D.} and D. Curien and I. Dedes and T. Dickel and J. Dudek and E. Dunling and G. Gwinner and Z. Hockenbery and Holt, {J. D.} and C. Hornung and C. Izzo and A. Jacobs and A. Javaji and B. Kootte and G. Kripk{\'o}-Koncz and Lykiardopoulou, {E. M.} and T. Miyagi and I. Mukul and T. Murb{\"o}ck and Pla{\ss}, {W. R.} and Reiter, {M. P.} and J. Ringuette and C. Scheidenberger and R. Silwal and C. Walls and Wang, {H. L.} and Y. Wang and J. Yang and J. Dilling and Kwiatkowski, {A. A.}",

note = "9 pages, 6 figures",

year = "2022",

month = apr,

day = "19",

doi = "10.1103/PhysRevC.105.L041301",

language = "English",

volume = "105",

pages = "1--8",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

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Porter, WS, Ashrafkhani, B, Bergmann, J, Brown, C, Brunner, T, Cardona, JD, Curien, D, Dedes, I, Dickel, T, Dudek, J, Dunling, E, Gwinner, G, Hockenbery, Z, Holt, JD, Hornung, C, Izzo, C, Jacobs, A, Javaji, A, Kootte, B, Kripkó-Koncz, G, Lykiardopoulou, EM, Miyagi, T, Mukul, I, Murböck, T, Plaß, WR, Reiter, MP, Ringuette, J, Scheidenberger, C, Silwal, R, Walls, C, Wang, HL, Wang, Y, Yang, J, Dilling, J & Kwiatkowski, AA 2022, 'Mapping the N=40 island of inversion: Precision mass measurements of neutron-rich Fe isotopes', Physical Review C, vol. 105, no. 4, L041301, pp. 1-8. https://doi.org/10.1103/PhysRevC.105.L041301

TY - JOUR

T1 - Mapping the N=40 island of inversion: Precision mass measurements of neutron-rich Fe isotopes

AU - Porter, W. S.

AU - Ashrafkhani, B.

AU - Bergmann, J.

AU - Brown, C.

AU - Brunner, T.

AU - Cardona, J. D.

AU - Curien, D.

AU - Dedes, I.

AU - Dickel, T.

AU - Dudek, J.

AU - Dunling, E.

AU - Gwinner, G.

AU - Hockenbery, Z.

AU - Holt, J. D.

AU - Hornung, C.

AU - Izzo, C.

AU - Jacobs, A.

AU - Javaji, A.

AU - Kootte, B.

AU - Kripkó-Koncz, G.

AU - Lykiardopoulou, E. M.

AU - Miyagi, T.

AU - Mukul, I.

AU - Murböck, T.

AU - Plaß, W. R.

AU - Reiter, M. P.

AU - Ringuette, J.

AU - Scheidenberger, C.

AU - Silwal, R.

AU - Walls, C.

AU - Wang, H. L.

AU - Wang, Y.

AU - Yang, J.

AU - Dilling, J.

AU - Kwiatkowski, A. A.

N1 - 9 pages, 6 figures

PY - 2022/4/19

Y1 - 2022/4/19

N2 - Nuclear properties across the chart of nuclides are key to improving and validating our understanding of the strong interaction in nuclear physics. We present high-precision mass measurements of neutron-rich Fe isotopes performed at the TITAN facility. The multiple-reflection time-of-flight mass spectrometer (MR-ToF-MS), achieving a resolving power greater than 600000 for the first time, enabled the measurement of 63–70Fe, including first-time high-precision direct measurements (δm/m≈10−7) of 68–70Fe, as well as the discovery of a long-lived isomeric state in 69Fe. These measurements are accompanied by both mean-field and ab initio calculations using the most recent realizations which enable theoretical assignment of the spin-parities of the 69Fe ground and isomeric states. Together with mean-field calculations of quadrupole deformation parameters for the Fe isotope chain, these results benchmark a maximum of deformation in the N=40 island of inversion in Fe and shed light on trends in level densities indicated in the newly refined mass surface.

AB - Nuclear properties across the chart of nuclides are key to improving and validating our understanding of the strong interaction in nuclear physics. We present high-precision mass measurements of neutron-rich Fe isotopes performed at the TITAN facility. The multiple-reflection time-of-flight mass spectrometer (MR-ToF-MS), achieving a resolving power greater than 600000 for the first time, enabled the measurement of 63–70Fe, including first-time high-precision direct measurements (δm/m≈10−7) of 68–70Fe, as well as the discovery of a long-lived isomeric state in 69Fe. These measurements are accompanied by both mean-field and ab initio calculations using the most recent realizations which enable theoretical assignment of the spin-parities of the 69Fe ground and isomeric states. Together with mean-field calculations of quadrupole deformation parameters for the Fe isotope chain, these results benchmark a maximum of deformation in the N=40 island of inversion in Fe and shed light on trends in level densities indicated in the newly refined mass surface.

KW - nucl-ex

KW - nucl-th

U2 - 10.1103/PhysRevC.105.L041301

DO - 10.1103/PhysRevC.105.L041301

M3 - Letter

SN - 2469-9985

VL - 105

SP - 1

EP - 8

JO - Physical Review C

JF - Physical Review C

IS - 4

M1 - L041301

ER -

Mapping the N=40 island of inversion: Precision mass measurements of neutron-rich Fe isotopes

Abstract

Keywords / Materials (for Non-textual outputs)

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Edinburgh Nuclear Physics Group Consolidated Grant Proposal

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