Muon/muonium in an isotopically pure 13C diamond

I. Z. Machi, S. H. Connell, J. P.F. Sellschop, K. Bharuth-Ram

Research output: Contribution to journalArticlepeer-review


A preliminary study of the diamagnetic (μd) and the paramagnetic (MuT) states in a synthetic C diamond has been performed using the Transverse Field Muon Spin Rotation method. This system could be used to verify the quantum diffusion behaviour observed before, however, with a more reliable extraction of the hopping rate. The results were obtained in an applied magnetic field of 7.5 mT and at sample temperatures of 10 K, 100 K and 200 K. The prompt fraction, f, of the μd state remains constant at 22(5)% in the range 10-200 K; that of the MuT state increases from 53(10)% at 10 K to 78(10)% at 200 K. The fractions of the two states add to 100% at 200 K, suggesting non-population of the bond-centred state, MuBC, which is often observed in other diamond samples. The μd state has a spin relaxation rate of 0.20(5) μs-1, in contrast to the zero value obtained in type II diamond samples. This indicates appreciable interaction of the μd state with the 13C atoms. The MuT state has a large spin relaxation rate ranging from 3.0(5) μs-1 at 10 K to 7.0(5) μs-1 at 200 K, consistent with values obtained in diamond samples with defects. This work is part of ongoing studies of muon/muonium-defect interactions in diamonds.

Original languageEnglish
Pages (from-to)723-726
Number of pages4
JournalHyperfine Interactions
Issue number3-8
Publication statusPublished - 2001
Externally publishedYes


  • C diamond
  • Muon
  • Muonium

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry


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