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Spin depolarization of muonium in mesoporous silica

Journal Article


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Abstract


  • We report muon spin rotation/relaxation measurements of muonium in mesoporous silica (SBA-15) with a high specific surface area of 600 m2/g. Up to 70 percent of the incoming muons form muonium and escape efficiently into the open pores at all temperatures between 3 and 300K. We present evidence that the interaction with the silica surfaces involves both spin exchange and a transition to a diamagnetic state, possibly due to dangling bonds on the surface. At very low temperatures, below 20K, the interaction between muonium and the silica surfaces is suppressed due to a He film coating the surfaces. These results indicate that it should be possible to use muonium to probe the surfaces of uncapped nanoparticles supported in silica.

Authors


  •   Dehn, M (external author)
  •   Arseneau, D J. (external author)
  •   Bridges, M D. (external author)
  •   Buck, T (external author)
  •   Cortie, David L.
  •   Cottrell, S P. (external author)
  •   Fleming, D G. (external author)
  •   Kelly, J A. (external author)
  •   Macfarlane, W A. (external author)
  •   MacLachlan, M J. (external author)
  •   Morris, G D. (external author)
  •   McKenzie, I (external author)
  •   Xiao, J (external author)
  •   Kiefl, R F. (external author)

Publication Date


  • 2014

Citation


  • Dehn, M. H., Arseneau, D. J., Bridges, M. D., Buck, T., Cortie, D. L., Cottrell, S. P., Fleming, D. G., Kelly, J. A., MacFarlane, W. A., MacLachlan, M. J., Morris, G. D., McKenzie, I., Xiao, J. & Kiefl, R. F. (2014). Spin depolarization of muonium in mesoporous silica. Journal of Physics: Conference Series, 551 012006-1-012006-6.

Scopus Eid


  • 2-s2.0-84919459292

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3330&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2308

Start Page


  • 012006-1

End Page


  • 012006-6

Volume


  • 551

Abstract


  • We report muon spin rotation/relaxation measurements of muonium in mesoporous silica (SBA-15) with a high specific surface area of 600 m2/g. Up to 70 percent of the incoming muons form muonium and escape efficiently into the open pores at all temperatures between 3 and 300K. We present evidence that the interaction with the silica surfaces involves both spin exchange and a transition to a diamagnetic state, possibly due to dangling bonds on the surface. At very low temperatures, below 20K, the interaction between muonium and the silica surfaces is suppressed due to a He film coating the surfaces. These results indicate that it should be possible to use muonium to probe the surfaces of uncapped nanoparticles supported in silica.

Authors


  •   Dehn, M (external author)
  •   Arseneau, D J. (external author)
  •   Bridges, M D. (external author)
  •   Buck, T (external author)
  •   Cortie, David L.
  •   Cottrell, S P. (external author)
  •   Fleming, D G. (external author)
  •   Kelly, J A. (external author)
  •   Macfarlane, W A. (external author)
  •   MacLachlan, M J. (external author)
  •   Morris, G D. (external author)
  •   McKenzie, I (external author)
  •   Xiao, J (external author)
  •   Kiefl, R F. (external author)

Publication Date


  • 2014

Citation


  • Dehn, M. H., Arseneau, D. J., Bridges, M. D., Buck, T., Cortie, D. L., Cottrell, S. P., Fleming, D. G., Kelly, J. A., MacFarlane, W. A., MacLachlan, M. J., Morris, G. D., McKenzie, I., Xiao, J. & Kiefl, R. F. (2014). Spin depolarization of muonium in mesoporous silica. Journal of Physics: Conference Series, 551 012006-1-012006-6.

Scopus Eid


  • 2-s2.0-84919459292

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3330&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2308

Start Page


  • 012006-1

End Page


  • 012006-6

Volume


  • 551