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Measurements of sound velocity of laser-irradiated iron foils relevant to Earth core condition |
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| Authors: | K Shigemori D Ichinose T Irifune K Otani T Shiota T Sakaiya H Azechi |
| Institution: | (1) Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan;(2) Geodynamics Research Center, Ehime University, Matsuyama, Ehime 790-8577, Japan |
| Abstract: | We present a novel scheme to measure sound velocity of shock-compressed iron of geophysical interest. The sound velocity of laser-irradiated iron foils was obtained with side-on X-ray radiograph technique from measured rarefaction wave velocity of shocked iron. Iron foils were irradiated with a two-stepped square laser pulse to reach Earth's core condition by double compression. The experimental parameters of temperature and pressure were very close to the Earth's core condition. |
| Keywords: | 52 35 Tc Shock waves and discontinuities 91 35 -x Earth's interior structure and properties 52 50 Jm Plasma production and heating by laser beams (laser-foil laser-cluster etc ) 52 70 La X-ray and gamma-ray measurements |
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