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Muon level crossing resonance in aluminium

  • Session 1. Diffusion/Localization
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Abstract

Cross relaxation between implanted positive muons and27Al nuclei in Al metal, lightly doped with Cu to impede the muon diffusion, shows weak resonances at 2.3 and 4.0 mT. Assignment of these to polarization transfervia the 1/2 ↔ 3/2 and 3/2 ↔ 5/2 transitions of the (J=5/2) spins leads to a quadrupole coupling constante 2qQ/h=1.8(1) MHz,i.e. an electric field gradient on Al nuclei immediately adjacent to the muon siteq=0.048(3) a.u., with a small departure from axial symmetry.

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Cox, S.F.J., Eaton, G.H., Sivia, D.S. et al. Muon level crossing resonance in aluminium. Hyperfine Interact 85, 59–65 (1994). https://doi.org/10.1007/BF02069402

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