高圧力の科学と技術
Online ISSN : 1348-1940
Print ISSN : 0917-639X
特集 — 地球深部物性研究の新展開 —
MgSiO3ペロブスカイトとポストペロブスカイト相の音速測定
村上 元彦
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2008 年 18 巻 1 号 p. 21-30

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Brillouin scattering measurements of the aggregate shear wave velocities in MgSiO3 perovskite and post-perovskite phase were conducted at high-pressure conditions relevant to the Earth’s lowermost mantle. Infrared laser annealing of samples in a diamond anvil cell enabled to obtain high quality Brillouin spectra and to extend the upper limit of pressure of Brillouin measurements. The large pressure range over which acoustic measurements of MgSiO3 perovskite and post-perovskite phase were performed has thereby allowed us to put tighter constraints on compositional models of the Earth’s lower mantle and enigmatic seismic observations in the lowermost mantle.

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© 2008 日本高圧力学会
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