Abstract
The spin manipulation technique by use of the β-NMR is further refined, based on the recent thorough studies of hyperfine interactions of 12B and 12N in Mg. By using this technique, the alignment correlation terms in the β-ray angular distribution of the A = 12 system are precisely measured, so that the axial charge is singled out to be y = 4.66 ± 0.06 (stat.) ± 0.13 (syst.) which shows clear mesonic enhancement over the impulse value.
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Yamaguchi, T., Minamisono, K., Ikeda, T. et al. Spin control of 12B and 12N and the axial charge from their β-ray spin-alignment correlations. Hyperfine Interactions 120, 701–705 (1999). https://doi.org/10.1023/A:1017096228334
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DOI: https://doi.org/10.1023/A:1017096228334