Journal
PHYSICS LETTERS B
Volume 678, Issue 5, Pages 465-469Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2009.06.063
Keywords
Hyperfine structure; NMR; Nuclear magnetic moment; Laser spectroscopy
Funding
- German Federal Ministry for Education and Research BMBF [06 MZ 215, 06 MZ 175]
- Helmholtz Association of German Research Centres [VH-NG-037, VH-NG148]
- EU [FP6 MEIF-CT-2006-042114]
- EURONS [RII3-CT-2004-506065]
- IUAP Project of OSCT Belgium [P5/07]
- FWO-Vlaanderen
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We present the results of combined laser spectroscopy and nuclear magnetic resonance studies of Mg-21. The nuclear ground-state spin was measured to be I = 5/2 with a magnetic moment of mu = -0.983(7)mu(N). The isoscalar magnetic moment of the mirror pair (F-21, Mg-21) is evaluated and compared to the extreme single-particle prediction and to nuclear shell-model calculations. We determine an isoscalar spin expectation value of = 1.15(2), which is significantly greater than the empirical limit of unity given by the Schmidt values of the magnetic moments. Shell-model calculations taking into account isospin non-conserving effects, are in agreement with our experimental results. (C) 2009 Elsevier B.V. All rights reserved.
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