https://doi.org/10.1140/epjd/e2007-00142-5
Measurements of sound velocity of laser-irradiated iron foils relevant to Earth core condition
1
Institute of Laser Engineering, Osaka University, Suita, Osaka, 565-0871, Japan
2
Geodynamics Research Center, Ehime University, Matsuyama, Ehime, 790-8577, Japan
Corresponding author: a shige@ile.osaka-u.ac.jp
Received:
16
February
2006
Revised:
6
December
2006
Published online:
6
April
2007
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.
PACS: 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
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2007
