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 Sarmiento Pico; Helena M. Albers; John T. Anderson; Michael A. Bentley; M. P. Carpenter; Christpher J. Chiara; Patrick A. Copp; Ulrika Forsberg; Tianheng Huang; H. Jayatissa; T Lauritsen; C. Müller-Gatermann; X. 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 Sarmiento Pico, Helena M. Albers, John T. Anderson, Michael A. Bentley, M. P. Carpenter, Christpher J. Chiara, Patrick A. Copp, Ulrika Forsberg, Tianheng Huang, H. Jayatissa, T Lauritsen, C. Müller-Gatermann, X. Pereira-Lopez, Walter Reviol, Darek Seweryniak, Sanna StolzeSivahami Uthayakumaar, Gemma L. Wilson, Jin Wu

Department of Physics

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

Abstract

High-spin nuclear isomers in N≈Z nuclei between doubly magic ⁴⁰Ca and ⁵⁶Ni 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 10⁺ isomer in ⁵⁴Fe. The isomer was strongly populated by means of the fusion-evaporation reaction ²⁴Mg(³⁶Ar,α2p)^54𝑚Fe. The Gammasphere array was used to detect γ-ray cascades emitted from the isomeric state. By means of γγγ coincidences, weak non-yrast decay branches can be discriminated, with the isomer’s half-life confirmed at T_1/2 =363(4) ns. The yrast 6⁺₁→2⁺₁ E4 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 - 2023 Aug 24

Subject classification (UKÄ)

Subatomic Physics

Free keywords

nuclear isomerism
electromagnetic transitions
nuclear shell model

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10.3390/atoms11090116Licence: CC BY

Cite this

Böhm, P., Hrabar, Y., Rudolph, D., Golubev, P., Sarmiento Pico, L., 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{55f807e581cd439cada736c55e18f0fc,

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 N≈Z nuclei between doubly magic 40Ca and 56Ni 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 10+ isomer in 54Fe. The isomer was strongly populated by means of the fusion-evaporation reaction 24Mg(36Ar,α2p)54푚Fe. The Gammasphere array was used to detect γ-ray cascades emitted from the isomeric state. By means of γγγ coincidences, weak non-yrast decay branches can be discriminated, with the isomer{\textquoteright}s half-life confirmed at T1/2 =363(4) ns. The yrast 6+1→2+1 E4 cross-over transition was interrogated. The observations are compared with shell-model calculations.",

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

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

year = "2023",

month = aug,

day = "24",

doi = "10.3390/atoms11090116",

language = "English",

volume = "11",

journal = "Atoms",

issn = "2218-2004",

publisher = "MDPI AG",

number = "9",

}

Böhm, P, Hrabar, Y , Rudolph, D , Golubev, P , Sarmiento Pico, L, 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 Pico, Luis

AU - Albers, Helena M.

AU - Anderson, John T.

AU - Bentley, Michael A.

AU - Carpenter, M. P.

AU - Chiara, Christpher J.

AU - Copp, Patrick A.

AU - Forsberg, Ulrika

AU - Huang, Tianheng

AU - Jayatissa, H.

AU - Lauritsen, T

AU - Müller-Gatermann, C.

AU - Pereira-Lopez, X.

AU - Reviol, Walter

AU - Seweryniak, Darek

AU - Stolze, Sanna

AU - Uthayakumaar, Sivahami

AU - Wilson, Gemma L.

AU - Wu, Jin

PY - 2023/8/24

Y1 - 2023/8/24

N2 - High-spin nuclear isomers in N≈Z nuclei between doubly magic 40Ca and 56Ni 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 10+ isomer in 54Fe. The isomer was strongly populated by means of the fusion-evaporation reaction 24Mg(36Ar,α2p)54푚Fe. The Gammasphere array was used to detect γ-ray cascades emitted from the isomeric state. By means of γγγ coincidences, weak non-yrast decay branches can be discriminated, with the isomer’s half-life confirmed at T1/2 =363(4) ns. The yrast 6+1→2+1 E4 cross-over transition was interrogated. The observations are compared with shell-model calculations.

AB - High-spin nuclear isomers in N≈Z nuclei between doubly magic 40Ca and 56Ni 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 10+ isomer in 54Fe. The isomer was strongly populated by means of the fusion-evaporation reaction 24Mg(36Ar,α2p)54푚Fe. The Gammasphere array was used to detect γ-ray cascades emitted from the isomeric state. By means of γγγ coincidences, weak non-yrast decay branches can be discriminated, with the isomer’s half-life confirmed at T1/2 =363(4) ns. The yrast 6+1→2+1 E4 cross-over transition was interrogated. The observations are compared with shell-model calculations.

KW - nuclear isomerism

KW - electromagnetic transitions

KW - nuclear shell model

UR - https://lup.lub.lu.se/student-papers/search/publication/9117612

U2 - 10.3390/atoms11090116

DO - 10.3390/atoms11090116

M3 - Article

SN - 2218-2004

VL - 11

JO - Atoms

JF - Atoms

IS - 9

M1 - 116

ER -

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

Abstract

Subject classification (UKÄ)

Free keywords

Access to Document

Other files and links

Fingerprint

Decay Modes of Exotic Nuclei

Nuclear physics midterm plan at Legnaro National Laboratories (LNL)

Mirror symmetry at mass A = 54: E4 effective charges near doubly magic ⁵⁶Ni

Decay Modes of Exotic Nuclei

Nuclear Structure at the Limits: Isotope-selective Spectroscopy

Platform for Advanced Radiaton Detectors

Cite this

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

Abstract

Subject classification (UKÄ)

Free keywords

Access to Document

Other files and links

Fingerprint

Research output

Decay Modes of Exotic Nuclei

Nuclear physics midterm plan at Legnaro National Laboratories (LNL)

Mirror symmetry at mass A = 54: E4 effective charges near doubly magic 56Ni

Projects

Decay Modes of Exotic Nuclei

Nuclear Structure at the Limits: Isotope-selective Spectroscopy

Equipment

Platform for Advanced Radiaton Detectors

Cite this

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

Mirror symmetry at mass A = 54: E4 effective charges near doubly magic ⁵⁶Ni