Abstract
Negative muons captured by atoms with zero nuclear spin usually retain about 1/6 of their initial spin polarization P_0 after cascading down to their lowest Bohr orbital. This is particularly observed for μ- implanted into graphite and diamond. However, μ- implanted into a powder of the fullerene C60 are found to show essentially zero residual polarization. A residual polarization of \sim P_0/6 is again seen in metallic K3C60. We speculate that these results are to be explained on the basis of hyperfine effects after completion of the muonic cascade.
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Gygax, F., Amato, A., Pinkpank, M. et al. Residual polarization of negative muons implanted in C60 and K3C60 . Hyperfine Interactions 106, 211–216 (1997). https://doi.org/10.1023/A:1012606427889
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DOI: https://doi.org/10.1023/A:1012606427889