Spin and magnetic moment of 31Al ground state

The g-factor of the ground state of 31Al ( T 1/2=640 ms) has been measured by the β-NMR technique on a polarized secondary fragment beam at GANIL, Caen, France. The measured value of | g|=1.517(20) is compared with sd-shell model calculations, which allows the assignment of spin and parity I π =5/2...

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Bibliographic Details
Published in:Physics letters. B 2002-06, Vol.537 (1), p.45-50
Main Authors: Borremans, D, Teughels, S, Smirnova, N.A, Balabanski, D.L, Coulier, N, Daugas, J.-M, de Oliveira Santos, F, Georgiev, G, Lewitowicz, M, Matea, I, Penionzhkevich, Yu.E, Schmidt-Ott, W.-D, Sobolev, Yu, Stanoiu, M, Vyvey, K, Neyens, G
Format: Article
Language:English
Subjects:
31Al ground state g-factor
Spin and parity
Spin-polarization from projectile-fragmentation
β-NMR
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Summary:The g-factor of the ground state of 31Al ( T 1/2=640 ms) has been measured by the β-NMR technique on a polarized secondary fragment beam at GANIL, Caen, France. The measured value of | g|=1.517(20) is compared with sd-shell model calculations, which allows the assignment of spin and parity I π =5/2 + to this state. The spectroscopy of neutron-rich Al isotopes on the border of the “island of inversion” is discussed in terms of the persistence of the N=20 shell closure for Z=13 nuclei.
ISSN:0370-2693
1873-2445
DOI:10.1016/S0370-2693(02)01867-1