Abstract
It is discussed that applicability of the diffusion approximation depends critically on the magnitude of the phonon-induced incoherency between muon levels in adjacent interstitial sites. By means of two examples it is demonstrated that the temperature below which the diffusion approach breaks down may be different for different physical situations.
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Teichler, H. Limitations of the diffusion approximation for muon motion in metals. Hyperfine Interact 17, 125–129 (1984). https://doi.org/10.1007/BF02065892
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DOI: https://doi.org/10.1007/BF02065892