EPJ

2021 Impact factor 3.131
EPJ A - Hadrons and Nuclei
Hadrons and Nuclei
Eur. Phys. J. A 9, 13-17

Short note

The A=51 mirror nuclei \ensuremath{\mathsf{^{51}Fe}} and \ensuremath{\mathsf{^{51}Mn}}

J. Ekman1 - D. Rudolph1 - C. Fahlander1 - R.J. Charity2 - W. Reviol2 - D.G. Sarantites2 - V. Tomov2 - R.M. Clark3 - M. Cromaz3 - P. Fallon3 - A.O. Macchiavelli3 - M. Carpenter4 - D. Seweryniak4

1 Department of Physics, Lund University, S-22100 Lund, Sweden
2 Chemistry Department, Washington University, St. Louis, MO 63130, USA
3 Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
4 Physics Division, Argonne National Laboratory, Argonne, IL 60439, USA

Received: 20 July 2000 / Revised version: 28 July 2000
Communicated by D. Schwalm

Abstract
Eighteen previously unknown $\gamma$-ray transitions were identified in the Tz=-1/2 nucleus 51Fe following the fusion-evaporation reaction 32S(28Si,$2\alpha1n$)51Fe. The level scheme reaches the fully aligned $I^{\pi}=27/2^{-}$ terminating state of the five holes in the f7/2 shell. The 17/2- state was found to be isomeric, and the lifetime was measured to be 2.87 ns. The mirror symmetry of 51Fe and 51Mn is discussed, and the level scheme of 51Fe is compared to shell-model calculations.

PACS
23.20.Lv Gamma transitions and level energies - 21.10.Sf Coulomb energies - 21.10.Tg Lifetimes - 27.40.+z $39 \leq A \leq 58$

Copyright Società Italiana di Fisica, Springer-Verlag 2000

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