title: Magnetic moment of the fragmentation-aligned 61Fe (9/2(+)) isomer.
abstract: We report on the g factor measurement of an isomer in the neutron-rich (61)(26)Fe (E(*)=861 keV and T(1/2)=239(5) ns). The isomer was produced and spin aligned via a projectile-fragmentation reaction at intermediate energy, the time dependent perturbed angular distribution method being used for the measurement of the g factor. For the first time, due to significant improvements of the experimental technique, an appreciable residual alignment of the nuclear spin ensemble has been observed, allowing a precise determination of its g factor, including the sign: g=-0.229(2). In this way we open the possibility to study moments of very neutron-rich short-lived isomers, not accessible via other production and spin-orientation methods.
authors.affiliation: GANIL, BP 55027, 14076 Caen Cedex 5, France.
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authors.lastname: Matea
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authors.lastname: Georgiev
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authors.lastname: Daugas
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authors.lastname: Hass
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authors.lastname: Neyens
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authors.lastname: Astabatyan
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authors.lastname: Balabanski
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authors.lastname: Bélier
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authors.lastname: Borremans
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authors.lastname: Goldring
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authors.lastname: Goutte
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authors.lastname: Himpe
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authors.lastname: Lewitowicz
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authors.lastname: Lukyanov
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authors.lastname: Méot
authors.forename: F de Oliveira
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authors.lastname: Santos
authors.forename: Yu E
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authors.lastname: Penionzhkevich
authors.forename: O
authors.initials: O
authors.lastname: Roig
authors.forename: M
authors.initials: M
authors.lastname: Sawicka