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

Published copy (DOI)

10.1140/epja/i2008-10587-4

Author(s)

D. Rudolph
R. Hoischen
M. Hellstrom
S. Pietri
Zs. Podolyak
P. H. Regan
A. B. Garnsworthy
S. J. Steer
F. Becker
P. Bednarczyk
L. Caceres
P. Doornenbal
J. Gerl
M. Gorska
J. Grebosz
I. Kojouharov
N. Kurz
W. Prokopowicz
H. Schaffner
H. J. Wollersheim
L. -L. Andersson
L. Atanasova
D. L. Balabanski
A. Blazhev
C. Brandau
C. Fahlander
E. K. Johansson
A. Jungclaus

Department/unit(s)

Physics

Publication details

Journal	European physical journal A : Hadrons & Nuclei
Date	Published - May 2008
Issue number	2
Volume	36
Number of pages	8
Pages (from-to)	131-138
Original language	English

Abstract

The fragmentation of a 550MeV/u primary beam of Ni-58 on a Be-9 target has been used to measure time-and energy-correlated gamma decays following the implantation of event-by-event discriminated secondary fragments into a Be-9 stopper plate. A new isomeric gamma decay with T-1/2 = 14(6 4) ns and E-gamma = 646.2(2) keV is observed and attributed to the decay of the yrast 3/2-state in Co-53(27)26. This short-lived isomeric state has been populated by means of nuclear reactions during the stopping process of the secondary fragments. The experimental findings are discussed in the framework of large-scale spherical shell model calculations in conjunction with isospin symmetry-breaking residual interactions for the A = 53, Tz = +/- 1/2 mirror nuclei Co-53 and Fe-53.

Research areas

SHELL-MODEL, RISING CAMPAIGN, FRAGMENTATION, SPECTROSCOPY, (CO-53)M, NUCLEI, NI-56, GSI

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