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

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Sammanfattning

High-spin nuclear isomers in NZ 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 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.
Originalspråkengelska
Artikelnummer116
Antal sidor7
TidskriftAtoms
Volym11
Nummer9
DOI
StatusPublished - 2023 aug. 24

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