Search for Weak Side Branches in the Electromagnetic Decay Paths of the 6526-keV 10+ Isomer in 54Fe

Paul Böhm; Yuliia Hrabar; Dirk Rudolph; Pavel Golubev; Luis G. Sarmiento; Helena M. Albers; John T. Anderson; Michael A. Bentley; Michael P. Carpenter; Christopher J. Chiara; Patrick A. Copp; Ulrika Forsberg; Tianheng Huang; Heshani Jayatissa; Torben Lauritsen; Claus Müller-Gatermann; Xesus Pereira-Lopez; Walter Reviol; Darek Seweryniak; Sanna Stolze; Sivahami Uthayakumaar; Gemma L. Wilson; Jin Wu

doi:10.3390/atoms11090116

Search for Weak Side Branches in the Electromagnetic Decay Paths of the 6526-keV 10⁺ Isomer in ⁵⁴Fe

Paul Böhm, Yuliia Hrabar, Dirk Rudolph^*, Pavel Golubev, Luis G. Sarmiento, Helena M. Albers, John T. Anderson, Michael A. Bentley, Michael P. Carpenter, Christopher J. Chiara, Patrick A. Copp, Ulrika Forsberg, Tianheng Huang, Heshani Jayatissa, Torben Lauritsen, Claus Müller-Gatermann, Xesus Pereira-Lopez, Walter Reviol, Darek Seweryniak, Sanna StolzeSivahami Uthayakumaar, Gemma L. Wilson, Jin Wu

^*Corresponding author for this work

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

Abstract

High-spin nuclear isomers in (Formula presented.) nuclei between doubly magic (Formula presented.) Ca and (Formula presented.) Ni provide an excellent testing ground for the nuclear shell model and questions related to isospin symmetry breaking in the vicinity of the proton drip line. The purpose of the present study is to investigate the possibility of weak electromagnetic decay branches along the decay paths of the 6526-keV (Formula presented.) isomer in (Formula presented.) Fe. The isomer was strongly populated by means of the fusion-evaporation reaction (Formula presented.) Mg((Formula presented.) Ar, (Formula presented.)) (Formula presented.) Fe. The Gammasphere array was used to detect (Formula presented.) -ray cascades emitted from the isomeric state. By means of (Formula presented.) coincidences, weak non-yrast decay branches can be discriminated, with the isomer’s half-life confirmed at (Formula presented.) ns. The yrast (Formula presented.) (Formula presented.) cross-over transition was interrogated. The observations are compared with shell-model calculations.

Original language	English
Article number	116
Number of pages	7
Journal	Atoms
Volume	11
Issue number	9
DOIs	https://doi.org/10.3390/atoms11090116
Publication status	Published - 24 Aug 2023

Bibliographical note

Funding Information:
This research was funded in part by the Swedish Research Council (Vetenskapsrådet, VR 2016-3969 and VR 2022-3828), the Crafoord Foundation in Lund (Grant 20180630), the U.S. Department of Energy, Office of Science, Office of Nuclear Physics (Contract No. DE-AC02-06CH11357), and the UKRI Science and Technology Facilities Council under grant numbers ST/P003885/1 and ST/V001035/1.

Funding Information:
We would like to thank the ATLAS accelerator crew for their supreme efforts. This research used resources of ANL’s ATLAS facility, which is a U.S. Department of Energy Office of Science User Facility. The isotope(s) used in this research were supplied by the U.S. Department of Energy Office of Science by the Isotope Program in the Office of Nuclear Physics.

Publisher Copyright:
© 2023 by the authors.

Keywords

electromagnetic transitions
nuclear isomer
nuclear shell model

Access to Document

10.3390/atoms11090116Licence: CC BY

Search for Weak Side Branches in the Electromagnetic Decay Paths of the 6526-keV 10+ Isomer in 54Fe
© 2023 by the authors.
Final published version, 323 KBLicence: CC BY

Cite this

Böhm, P., Hrabar, Y., Rudolph, D., Golubev, P., Sarmiento, L. G., Albers, H. M., Anderson, J. T., Bentley, M. A., Carpenter, M. P., Chiara, C. J., Copp, P. A., Forsberg, U., Huang, T., Jayatissa, H., Lauritsen, T., Müller-Gatermann, C., Pereira-Lopez, X., Reviol, W., Seweryniak, D., ... Wu, J. (2023). Search for Weak Side Branches in the Electromagnetic Decay Paths of the 6526-keV 10⁺ Isomer in ⁵⁴Fe. Atoms, 11(9), Article 116. https://doi.org/10.3390/atoms11090116

@article{62974a563a214ef3ac30a99330733cd8,

title = "Search for Weak Side Branches in the Electromagnetic Decay Paths of the 6526-keV 10+ Isomer in 54Fe",

abstract = "High-spin nuclear isomers in (Formula presented.) nuclei between doubly magic (Formula presented.) Ca and (Formula presented.) Ni provide an excellent testing ground for the nuclear shell model and questions related to isospin symmetry breaking in the vicinity of the proton drip line. The purpose of the present study is to investigate the possibility of weak electromagnetic decay branches along the decay paths of the 6526-keV (Formula presented.) isomer in (Formula presented.) Fe. The isomer was strongly populated by means of the fusion-evaporation reaction (Formula presented.) Mg((Formula presented.) Ar, (Formula presented.)) (Formula presented.) Fe. The Gammasphere array was used to detect (Formula presented.) -ray cascades emitted from the isomeric state. By means of (Formula presented.) coincidences, weak non-yrast decay branches can be discriminated, with the isomer{\textquoteright}s half-life confirmed at (Formula presented.) ns. The yrast (Formula presented.) (Formula presented.) cross-over transition was interrogated. The observations are compared with shell-model calculations.",

keywords = "electromagnetic transitions, nuclear isomer, nuclear shell model",

author = "Paul B{\"o}hm and Yuliia Hrabar and Dirk Rudolph and Pavel Golubev and Sarmiento, {Luis G.} and Albers, {Helena M.} and Anderson, {John T.} and Bentley, {Michael A.} and Carpenter, {Michael P.} and Chiara, {Christopher J.} and Copp, {Patrick A.} and Ulrika Forsberg and Tianheng Huang and Heshani Jayatissa and Torben Lauritsen and Claus M{\"u}ller-Gatermann and Xesus Pereira-Lopez and Walter Reviol and Darek Seweryniak and Sanna Stolze and Sivahami Uthayakumaar and Wilson, {Gemma L.} and Jin Wu",

note = "Funding Information: This research was funded in part by the Swedish Research Council (Vetenskapsr{\aa}det, VR 2016-3969 and VR 2022-3828), the Crafoord Foundation in Lund (Grant 20180630), the U.S. Department of Energy, Office of Science, Office of Nuclear Physics (Contract No. DE-AC02-06CH11357), and the UKRI Science and Technology Facilities Council under grant numbers ST/P003885/1 and ST/V001035/1. Funding Information: We would like to thank the ATLAS accelerator crew for their supreme efforts. This research used resources of ANL{\textquoteright}s ATLAS facility, which is a U.S. Department of Energy Office of Science User Facility. The isotope(s) used in this research were supplied by the U.S. Department of Energy Office of Science by the Isotope Program in the Office of Nuclear Physics. Publisher Copyright: {\textcopyright} 2023 by the authors.",

year = "2023",

month = aug,

day = "24",

doi = "10.3390/atoms11090116",

language = "English",

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Böhm, P, Hrabar, Y, Rudolph, D, Golubev, P, Sarmiento, LG, Albers, HM, Anderson, JT, Bentley, MA, Carpenter, MP, Chiara, CJ, Copp, PA, Forsberg, U, Huang, T, Jayatissa, H, Lauritsen, T, Müller-Gatermann, C, Pereira-Lopez, X, Reviol, W, Seweryniak, D, Stolze, S, Uthayakumaar, S, Wilson, GL & Wu, J 2023, 'Search for Weak Side Branches in the Electromagnetic Decay Paths of the 6526-keV 10⁺ Isomer in ⁵⁴Fe', Atoms, vol. 11, no. 9, 116. https://doi.org/10.3390/atoms11090116

TY - JOUR

T1 - Search for Weak Side Branches in the Electromagnetic Decay Paths of the 6526-keV 10+ Isomer in 54Fe

AU - Böhm, Paul

AU - Hrabar, Yuliia

AU - Rudolph, Dirk

AU - Golubev, Pavel

AU - Sarmiento, Luis G.

AU - Albers, Helena M.

AU - Anderson, John T.

AU - Bentley, Michael A.

AU - Carpenter, Michael P.

AU - Chiara, Christopher J.

AU - Copp, Patrick A.

AU - Forsberg, Ulrika

AU - Huang, Tianheng

AU - Jayatissa, Heshani

AU - Lauritsen, Torben

AU - Müller-Gatermann, Claus

AU - Pereira-Lopez, Xesus

AU - Reviol, Walter

AU - Seweryniak, Darek

AU - Stolze, Sanna

AU - Uthayakumaar, Sivahami

AU - Wilson, Gemma L.

AU - Wu, Jin

N1 - Funding Information: This research was funded in part by the Swedish Research Council (Vetenskapsrådet, VR 2016-3969 and VR 2022-3828), the Crafoord Foundation in Lund (Grant 20180630), the U.S. Department of Energy, Office of Science, Office of Nuclear Physics (Contract No. DE-AC02-06CH11357), and the UKRI Science and Technology Facilities Council under grant numbers ST/P003885/1 and ST/V001035/1. Funding Information: We would like to thank the ATLAS accelerator crew for their supreme efforts. This research used resources of ANL’s ATLAS facility, which is a U.S. Department of Energy Office of Science User Facility. The isotope(s) used in this research were supplied by the U.S. Department of Energy Office of Science by the Isotope Program in the Office of Nuclear Physics. Publisher Copyright: © 2023 by the authors.

PY - 2023/8/24

Y1 - 2023/8/24

N2 - High-spin nuclear isomers in (Formula presented.) nuclei between doubly magic (Formula presented.) Ca and (Formula presented.) Ni provide an excellent testing ground for the nuclear shell model and questions related to isospin symmetry breaking in the vicinity of the proton drip line. The purpose of the present study is to investigate the possibility of weak electromagnetic decay branches along the decay paths of the 6526-keV (Formula presented.) isomer in (Formula presented.) Fe. The isomer was strongly populated by means of the fusion-evaporation reaction (Formula presented.) Mg((Formula presented.) Ar, (Formula presented.)) (Formula presented.) Fe. The Gammasphere array was used to detect (Formula presented.) -ray cascades emitted from the isomeric state. By means of (Formula presented.) coincidences, weak non-yrast decay branches can be discriminated, with the isomer’s half-life confirmed at (Formula presented.) ns. The yrast (Formula presented.) (Formula presented.) cross-over transition was interrogated. The observations are compared with shell-model calculations.

AB - High-spin nuclear isomers in (Formula presented.) nuclei between doubly magic (Formula presented.) Ca and (Formula presented.) Ni provide an excellent testing ground for the nuclear shell model and questions related to isospin symmetry breaking in the vicinity of the proton drip line. The purpose of the present study is to investigate the possibility of weak electromagnetic decay branches along the decay paths of the 6526-keV (Formula presented.) isomer in (Formula presented.) Fe. The isomer was strongly populated by means of the fusion-evaporation reaction (Formula presented.) Mg((Formula presented.) Ar, (Formula presented.)) (Formula presented.) Fe. The Gammasphere array was used to detect (Formula presented.) -ray cascades emitted from the isomeric state. By means of (Formula presented.) coincidences, weak non-yrast decay branches can be discriminated, with the isomer’s half-life confirmed at (Formula presented.) ns. The yrast (Formula presented.) (Formula presented.) cross-over transition was interrogated. The observations are compared with shell-model calculations.

KW - electromagnetic transitions

KW - nuclear isomer

KW - nuclear shell model

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U2 - 10.3390/atoms11090116

DO - 10.3390/atoms11090116

M3 - Article

AN - SCOPUS:85174694330

SN - 2218-2004

VL - 11

JO - Atoms

JF - Atoms

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ER -