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Longitudinal field muon spin relaxation (LF-μSR) measurements and evidence for a new muonium defect site in type Ia diamond

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Abstract

A new configuration for muonium, with hyperfine interaction parameters of less than axial symmetry, in nitrogen rich diamond is identified in Longitudinal Field Muon Spin Relaxation (LF-μSR) measurements. The TF-μSR measurements on the same sample show that almost the entire strength of the new configuration is accounted for by a “missing fraction”, typically seen in nitrogen rich type Ia diamond. The “missing fraction” is therefore the result of a T2 relaxation. This is consistent with muon trapping at or in some nitrogen related defect(s) followed by electron capture at random times.

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Authors and Affiliations

  1. Physics Department, Clarendon Laboratory, Parks Road, Oxford, OX13PU, UK

    J.M. Baker, T. Jestadt & P. Murphy

  2. SRCNS, University of the Witwatersrand, PO Wits, Johannesburg, 2050, South Africa

    I.Z. Machi, S.H. Connell, C.G. Fischer, R.W.N. Nilen & J.P.F. Sellschop

  3. Physics Department, University of Durban-Westville, Durban, 4000, South Africa

    K. Bharuth-Ram

  4. Naval Research Laboratory, Washington, DC, USA

    J.E. Butler

  5. ISIS Facility, Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX, UK

    S.F.J. Cox

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  1. J.M. Baker
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  2. I.Z. Machi
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  3. S.H. Connell
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  4. K. Bharuth-Ram
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  5. J.E. Butler
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  6. S.F.J. Cox
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  7. C.G. Fischer
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  8. T. Jestadt
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  9. P. Murphy
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  10. R.W.N. Nilen
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  11. J.P.F. Sellschop
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Baker, J., Machi, I., Connell, S. et al. Longitudinal field muon spin relaxation (LF-μSR) measurements and evidence for a new muonium defect site in type Ia diamond. Hyperfine Interactions 120, 579–583 (1999). https://doi.org/10.1023/A:1017098901501

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  • DOI: https://doi.org/10.1023/A:1017098901501

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