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Phys. Rev. C 74, 021301(R) (2006) [4 pages]

Measurement of the spin and magnetic moment of 23Al

A. Ozawa,1 K. Matsuta,2 T. Nagatomo,3 M. Mihara,2 K. Yamada,3 T. Yamaguchi,4 T. Ohtsubo,5 S. Momota,6 T. Izumikawa,7 T. Sumikama,3 Y. Nakashima,2 H. Fujiwara,2 S. Kumashiro,2 R. Matsumiya,2 M. Ota,5 D. Shinojima,5 H. Tanaka,5 T. Yasuno,1 S. Nakajima,4 T. Suzuki,4 K. Yoshida,3 K. Muranaka,4 T. Maemura,4 A. Chiba,1 Y. Utsuno,8 M. Fukuda,2 K. Tanaka,3 I. Tanihata,9 Y. Nojiri,6 T. Minamisono,2,10 J. R. Alonso,11 G. F. Krebs,11 and T. J. M. Symons11
1Institute of Physics, University of Tsukuba, Ibaraki 305-8571, Japan
2Graduate School of Science, Osaka University, Osaka 560, Japan
3RIKEN, Saitama 351-0198, Japan
4Faculty of Science, Saitama University, Saitama 338-8570, Japan
5Department of Physics, Niigata University, Niigata 950-218, Japan
6Kochi Institute of Technology, Kochi 782-8502, Japan
7Radioisotope Center, Niigata University, Niigata 951-8510, Japan
8Advanced Science Research Center, Japan Atomic Energy Agency, Ibaraki 319-1106, Japan
9TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
10Fukui University of Technology, Fukui 910-8505, Japan
11Lawrence Berkeley National Laboratory, Berkley, California 94720, USA

Rapid Received 20 December 2005; published 1 August 2006

For the first time, we obtained the g factor for the ground state of 23Al by use of a beta-NMR measurement. 23Al has a small proton separation energy and is a potential proton-halo candidate. The obtained g factor, |g|=1.557±0.088, clearly shows the spin and parity, Jpi=5/2+, for 23Al, which is the same as that of its mirror partner, 23Ne. The possible nuclear structure of 23Al is also discussed.

©2006 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevC.74.021301
DOI: 10.1103/PhysRevC.74.021301
PACS: 21.10.Ky; 21.10.Hw; 27.30.+t
  • 21.10.Ky
    Nuclear electromagnetic moments
  • 21.10.Hw
    Nuclear spin, parity, and isobaric spin
  • 27.30.+t
    Properties of nuclei with 20 <= A <= 38
  • YEAR: 2006

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