Hyperfine splitting of muonium in SiO2 powder |
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| Authors: | R F Kiefl B D Patterson E Holzschuh W Odermatt D R Harshman |
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| Institution: | (1) Physics Institute, University of Zürich, 8001 Zürich, Switzerland;(2) Department of Physics, University of British Columbia, Vancouver, Canada |
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| Abstract: | The hyperfine splitting of Mu in evacuated SiO2 powder has been measured over the temperature range 17–300 K using the two frequency method. Above 100 K it is consistent with the vacuum value (4463.3 MHz) indicating the Mu atoms are moving freely between the particle grains. At lower temperatures it drops rapidly to 4437±4 MHz at 17 K. The effect is attributed to thermal adsorption on the SiO2 surface. Measurements were also made on an Ar coated powder between 7–62 K. The hyperfine splitting is consistent with the vacuum value over this range. |
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