/ Experiment-Nucl nucl-ex/0404038

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

Matea, I. (GANIL) ; Georgiev, G. (GANIL) ; Daugas, J.M. (CEA DAM) ; Hass, M. (Weizmann Inst.) ; Neyens, G. (Leuven U.) ; Astabatyan, R. ; Baby, L.T. ; Balabanski, D.L. ; Belier, G. ; Borremans, D. ; Chappert, F. ; Girod, M. ; Goldring, G. ; Goutte, H. ; Himpe, P. ; Lewitowicz, M. ; Lukyanov, S. ; Meot, V. ; de Oliveira Santos, F. ; Penionzhkevich, Yu.E. ; Porquet, M.G. ; Roig, O. ; Sawicka, M.

Published in: Phys.Rev.Lett.
Year: 2004
Vol.: 93
Page No: 142503
Pages: 4

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 $\nu g_{9/2}$.

Keyword(s): nuclear isomerism ; nuclear magnetic moment ; nuclear fragmentation ; nuclear spin ; nuclei with mass number 59 to 89 ; nuclear models

Web-Page: http://www.adsabs.harvard.edu/abs/2004PhRvL..93n2503M; http://dx.doi.org/10.1103/PhysRevLett.93.142503; http://link.aps.org/abstract/PRL/V93/E142503

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