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Magnetic Moment of the Fragmentation Aligned 61Fe(9/2)+ Isomer

I. Matea·G. Georgiev·J. M. Daugas·M. Hass·G. Neyens
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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 $νg_{9/2}$.

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I. Matea, G. Georgiev, J. M. Daugas, M. Hass, G. Neyens. 2004-04-28. Magnetic Moment of the Fragmentation Aligned 61Fe(9/2)+ Isomer. https://doi.org/10.1103/physrevlett.93.142503

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