Abstract：
:Hydrogen in the Earth's deep interior has been thought to exist as a hydroxyl group in high-pressure minerals. We present Muon Spin Rotation experiments on SiO2 stishovite, which is an archetypal high-pressure mineral. Positive muon (which can be considered as a light isotope of proton) implanted in stishovite was found to capture electron to form muonium (corresponding to neutral hydrogen). The hyperfine-coupling parameter and the relaxation rate of spin polarization of muonium in stishovite were measured to be very large, suggesting that muonium is squeezed in small and anisotropic interstitial voids without binding to silicon or oxygen. These results imply that hydrogen may also exist in the form of neutral atomic hydrogen in the deep mantle.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Funamori N,Kojima KM,Wakabayashi D,Sato T,Taniguchi T,Nishiyama N,Irifune T,Tomono D,Matsuzaki T,Miyazaki M,Hiraishi M,Koda A,Kadono Rdoi
10.1038/srep08437subject
Has Abstractpub_date
2015-02-13 00:00:00pages
8437issn
2045-2322pii
srep08437journal_volume
5pub_type
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