Abstract
THE nuclear spin I of rubidium-86 has been measured by the atomic beam method using magnetic resonance; a mass spectrometer was employed to select the correct isotope1. A pronounced resonance was obtained at a frequency of 2.36 Mc./sec. in a magnetic field of 4.22 gauss, which gives I = 2. This value is in agreement with the observed shape of the β-spectrum2. The hyperfine structure separation was found to be 3,900 ± 100 Mc./sec., which means a magnetic moment of 1.66 ± 0.4 nuclear magnetons. The results suggest that the magnetic moment is probably negative and it would then have a value of − 1.68 ± 0.01 nuclear magnetons. It is planned to extend the measurements to obtain a more accurate value of the magnetic moment and definitely establish its sign.
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References
Davis, Nagle and Zacharias, Phys. Rev., 76, 1068 (1949).
Zaffarano, Kern and Mitchell, Phys. Rev., 74, 682 (1948).
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BELLAMY, E. Nuclear Spin of Rubidium-86. Nature 168, 556 (1951). https://doi.org/10.1038/168556a0
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DOI: https://doi.org/10.1038/168556a0
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