Abstract
As is obvious from the energetic point of view, positive muons must form the molecular ion ( He_2μ)+ in condensed phases of helium. A theory of positive muon spin depolarization in crystalline phase of 3He in this model is devised. The theory explains experimental results. It is shown that the abrupt temperature dependence of the muon spin depolarization rate at T < 2 K which is observed in experiments is explained by spin–phonon interaction. This interaction mechanism arises due to a modulation of the exchange interaction between host atoms of the 3He‐lattice.
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Belousov, Y., Smilga, V. Theory of muon spin depolarization in crystalline phases of 3He. Hyperfine Interactions 106, 63–68 (1997). https://doi.org/10.1023/A:1012613101965
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DOI: https://doi.org/10.1023/A:1012613101965