Spin and magnetic moment of Al-31 ground state

ISSN
0370-2693
Date Issued
2002
Author(s)
Borremans, D.
Teughels, S.
Smirnova, N. A.
Balabanski, D. L.
Coulier, N.
Daugas, J. M.
Santos, F. D.
Georgiev, G.
Lewitowicz, M.
Matea, I.
Penionzhkevich, Y. E.
Sobolev, Y.
Stanoiu, M.
Vyvey, K.
Neyens, G.
DOI
10.1016/S0370-2693(02)01867-1
Abstract
The g-factor of the ground state of Al-31 (T-1/2 = 640 ms) has been measured by the beta-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-pi = 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. (C) 2002 Elsevier Science B.V. All rights reserved.