Magnetic moment of the fragmentation-aligned 61Fe (9/2(+)) isomer.
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.
Matea
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GANIL, BP 55027, 14076 Caen Cedex 5, France.
Georgiev
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G
Daugas
J M
JM
Hass
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M
Neyens
G
G
Astabatyan
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R
Baby
L T
LT
Balabanski
D L
DL
Bélier
G
G
Borremans
D
D
Goldring
G
G
Goutte
H
H
Himpe
P
P
Lewitowicz
M
M
Lukyanov
S
S
Méot
V
V
Santos
F de Oliveira
Fde O
Penionzhkevich
Yu E
YE
Roig
O
O
Sawicka
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M