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Magnetic moment of the fragmentation-aligned $^{61}$Fe (9/$2^+$) isomer

Abstract : We report on the g factor measurement of the isomer in $^{61}Fe$ ($E^{*}=861 keV$). The isomer was produced and spin-aligned via a projectile-fragmentation reaction at intermediate energy, the Time Dependent Perturbed Angular Distribution (TDPAD) 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 isomer has been observed, allowing a precise determination of its g factor: $g=-0.229(2)$. Comparison of the experimental g factor with shell-model and mean field calculations confirms the $9/2^+$ spin and parity assignments and suggests the onset of deformation due to the intrusion of Nilsson orbitals emerging from the $\nu g_{9/2}$.
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Contributor : Michel Lion <>
Submitted on : Friday, October 8, 2004 - 11:24:33 AM
Last modification on : Monday, November 30, 2020 - 11:04:04 AM

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I. Matea, G. Georgiev, J.M. Daugas, M. Haas, G. Neyens, et al.. Magnetic moment of the fragmentation-aligned $^{61}$Fe (9/$2^+$) isomer. Physical Review Letters, American Physical Society, 2004, 93, pp.142503-1-142503-4. ⟨10.1103/PhysRevLett.93.142503⟩. ⟨in2p3-00023170⟩



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