Isomeric Excitation Energy for in 99 m from Mass Spectrometry Reveals Constant Trend next to Doubly Magic Sn 100

L. Nies; D. Atanasov; M. Athanasakis-Kaklamanakis; M. Au; K. Blaum; J. Dobaczewski; B. S. Hu; J. D. Holt; J. Karthein; I. Kulikov; Yu A. Litvinov; D. Lunney; V. Manea; T. Miyagi; M. Mougeot; L. Schweikhard; A. Schwenk; K. Sieja; F. Wienholtz

doi:10.1103/PhysRevLett.131.022502

Isomeric Excitation Energy for in 99 m from Mass Spectrometry Reveals Constant Trend next to Doubly Magic Sn 100

L. Nies, D. Atanasov, M. Athanasakis-Kaklamanakis, M. Au, K. Blaum, J. Dobaczewski, B. S. Hu, J. D. Holt, J. Karthein, I. Kulikov, Yu A. Litvinov, D. Lunney, V. Manea, T. Miyagi, M. Mougeot, L. Schweikhard, A. Schwenk, K. Sieja, F. Wienholtz

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Abstract

The excitation energy of the 1/2- isomer in In99 at N=50 is measured to be 671(37) keV and the mass uncertainty of the 9/2+ ground state is significantly reduced using the ISOLTRAP mass spectrometer at ISOLDE/CERN. The measurements exploit a major improvement in the resolution of the multireflection time-of-flight mass spectrometer. The results reveal an intriguing constancy of the 1/2- isomer excitation energies in neutron-deficient indium that persists down to the N=50 shell closure, even when all neutrons are removed from the valence shell. This trend is used to test large-scale shell model, ab initio, and density functional theory calculations. The models have difficulties describing both the isomer excitation energies and ground-state electromagnetic moments along the indium chain.

Original language	English
Article number	022502
Journal	Physical Review Letters
Volume	131
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.131.022502
State	Published - Jul 14 2023
Externally published	Yes

Funding

We thank the ISOLDE technical group and the ISOLDE Collaboration for their support. We acknowledge the support of the German Max Planck Society, the French Institut National de Physique Nucléaire et de Physique des Particules (IN2P3), the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant Agreements No. 682841 ‘ASTRUm’, 654002 ‘ENSAR2’, 101020842 ‘EUSTRONG’, and 861198 ‘LISA’), as well as the German Federal Ministry of Education and Research (BMBF; Grants No. 05P18HGCIA, 05P21HGCI1, and 05P21RDFNB). L. N. acknowledges support from the Wolfgang Gentner Programme of the German Federal Ministry of Education and Research (Grant No. 13E18CHA). This work was partially supported by the STFC Grants No. ST/P003885/1 and No. ST/V001035/1, by the Polish National Science Centre under Contract No. 2018/31/B/ST2/02220, and by a Leverhulme Trust Research Project Grant. The VS-IMSRG computations were in part performed with an allocation of computing resources at the Jülich Supercomputing Center and with an allocation of computing resources on Cedar at WestGrid and Compute Canada using imsrg++ and KSHELL codes. We acknowledge the CSC-IT Center for Science Ltd., Finland, for allocating computational resources. This project was partly undertaken on the Viking Cluster, which is a high-performance computing facility provided by the University of York. We are grateful for computational support from the University of York High Performance Computing service, Viking, and the Research Computing team. The experiment was conducted by M. A.-K., M. Au, D. A., K. B., I. K., Yu. A. L., D. L., V. M., M. M., L. N., and F. W. The theoretical calculations were performed by J. D., B. S. H., J. D. H, T. M., A. S., and K. S. All authors contributed to the preparation of the manuscript.

Funders	Funder number
German Max Planck Society
Horizon 2020 Framework Programme	861198, 654002, 682841, 101020842
Science and Technology Facilities Council	ST/V001035/1, ST/P003885/1
Leverhulme Trust
European Research Council
Bundesministerium für Bildung und Forschung	13E18CHA, 05P21RDFNB, 05P21HGCI1, 05P18HGCIA
Narodowe Centrum Nauki	2018/31/B/ST2/02220
Institut National de Physique Nucléaire et de Physique des Particules

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10.1103/PhysRevLett.131.022502

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Nies, L., Atanasov, D., Athanasakis-Kaklamanakis, M., Au, M., Blaum, K., Dobaczewski, J., Hu, B. S., Holt, J. D., Karthein, J., Kulikov, I., Litvinov, Y. A., Lunney, D., Manea, V., Miyagi, T., Mougeot, M., Schweikhard, L., Schwenk, A., Sieja, K., & Wienholtz, F. (2023). Isomeric Excitation Energy for in 99 m from Mass Spectrometry Reveals Constant Trend next to Doubly Magic Sn 100. Physical Review Letters, 131(2), Article 022502. https://doi.org/10.1103/PhysRevLett.131.022502

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title = "Isomeric Excitation Energy for in 99 m from Mass Spectrometry Reveals Constant Trend next to Doubly Magic Sn 100",

abstract = "The excitation energy of the 1/2- isomer in In99 at N=50 is measured to be 671(37) keV and the mass uncertainty of the 9/2+ ground state is significantly reduced using the ISOLTRAP mass spectrometer at ISOLDE/CERN. The measurements exploit a major improvement in the resolution of the multireflection time-of-flight mass spectrometer. The results reveal an intriguing constancy of the 1/2- isomer excitation energies in neutron-deficient indium that persists down to the N=50 shell closure, even when all neutrons are removed from the valence shell. This trend is used to test large-scale shell model, ab initio, and density functional theory calculations. The models have difficulties describing both the isomer excitation energies and ground-state electromagnetic moments along the indium chain.",

author = "L. Nies and D. Atanasov and M. Athanasakis-Kaklamanakis and M. Au and K. Blaum and J. Dobaczewski and Hu, {B. S.} and Holt, {J. D.} and J. Karthein and I. Kulikov and Litvinov, {Yu A.} and D. Lunney and V. Manea and T. Miyagi and M. Mougeot and L. Schweikhard and A. Schwenk and K. Sieja and F. Wienholtz",

note = "Publisher Copyright: {\textcopyright} 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.",

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Nies, L, Atanasov, D, Athanasakis-Kaklamanakis, M, Au, M, Blaum, K, Dobaczewski, J, Hu, BS, Holt, JD, Karthein, J, Kulikov, I, Litvinov, YA, Lunney, D, Manea, V, Miyagi, T, Mougeot, M, Schweikhard, L, Schwenk, A, Sieja, K & Wienholtz, F 2023, 'Isomeric Excitation Energy for in 99 m from Mass Spectrometry Reveals Constant Trend next to Doubly Magic Sn 100', Physical Review Letters, vol. 131, no. 2, 022502. https://doi.org/10.1103/PhysRevLett.131.022502

TY - JOUR

T1 - Isomeric Excitation Energy for in 99 m from Mass Spectrometry Reveals Constant Trend next to Doubly Magic Sn 100

AU - Nies, L.

AU - Atanasov, D.

AU - Athanasakis-Kaklamanakis, M.

AU - Au, M.

AU - Blaum, K.

AU - Dobaczewski, J.

AU - Hu, B. S.

AU - Holt, J. D.

AU - Karthein, J.

AU - Kulikov, I.

AU - Litvinov, Yu A.

AU - Lunney, D.

AU - Manea, V.

AU - Miyagi, T.

AU - Mougeot, M.

AU - Schweikhard, L.

AU - Schwenk, A.

AU - Sieja, K.

AU - Wienholtz, F.

N1 - Publisher Copyright: © 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

PY - 2023/7/14

Y1 - 2023/7/14

N2 - The excitation energy of the 1/2- isomer in In99 at N=50 is measured to be 671(37) keV and the mass uncertainty of the 9/2+ ground state is significantly reduced using the ISOLTRAP mass spectrometer at ISOLDE/CERN. The measurements exploit a major improvement in the resolution of the multireflection time-of-flight mass spectrometer. The results reveal an intriguing constancy of the 1/2- isomer excitation energies in neutron-deficient indium that persists down to the N=50 shell closure, even when all neutrons are removed from the valence shell. This trend is used to test large-scale shell model, ab initio, and density functional theory calculations. The models have difficulties describing both the isomer excitation energies and ground-state electromagnetic moments along the indium chain.

AB - The excitation energy of the 1/2- isomer in In99 at N=50 is measured to be 671(37) keV and the mass uncertainty of the 9/2+ ground state is significantly reduced using the ISOLTRAP mass spectrometer at ISOLDE/CERN. The measurements exploit a major improvement in the resolution of the multireflection time-of-flight mass spectrometer. The results reveal an intriguing constancy of the 1/2- isomer excitation energies in neutron-deficient indium that persists down to the N=50 shell closure, even when all neutrons are removed from the valence shell. This trend is used to test large-scale shell model, ab initio, and density functional theory calculations. The models have difficulties describing both the isomer excitation energies and ground-state electromagnetic moments along the indium chain.

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AN - SCOPUS:85164959572

SN - 0031-9007

VL - 131

JO - Physical Review Letters

JF - Physical Review Letters

IS - 2

M1 - 022502

ER -

Isomeric Excitation Energy for in 99 m from Mass Spectrometry Reveals Constant Trend next to Doubly Magic Sn 100

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