TY - JOUR
T1 - Dynamic X-ray diffraction observation of shocked solid iron up to 170 GPa
AU - Denoeud, Adrien
AU - Ozaki, Norimasa
AU - Benuzzi-Mounaix, Alessandra
AU - Uranishi, Hiroyuki
AU - Kondo, Yoshihiko
AU - Brambrink, Erik
AU - Ravasio, Alessandra
AU - Bocoum, Maimouna
AU - Boudenne, Jean-Michel
AU - Harmand, Marion
AU - Guyot, Francois
AU - Mazevet, Stephane
AU - Riley, David
AU - Makita, Mikako
AU - Sano, Takayoshi
AU - Sakawa, Youichi
AU - Inubushi, Yuici
AU - Gregori, Gianluca
AU - Koenig, Michael
AU - Morard, Guillaume
PY - 2016/7/12
Y1 - 2016/7/12
N2 - Iron is the main constituent of the core of rocky planets; therefore, understanding its phase diagram under extreme conditions is fundamental to model the planets’ evolution. Using dynamic compression by laser-driven shocks, pressure and temperature conditions close to what is found in these cores can be reached. However, it remains unclear whether phase boundaries determined at nanosecond timescales agree with static compression. Here we observed the presence of solid hexagonal close-packed iron at 170 GPa and 4,150 K, in a part of the iron phase diagram, where either a different solid structure or liquid iron has been proposed. This X-ray diffraction experiment confirms that laser compression is suitable for studying iron at conditions of deep planetary interiors difficult to achieve with static compression techniques.
AB - Iron is the main constituent of the core of rocky planets; therefore, understanding its phase diagram under extreme conditions is fundamental to model the planets’ evolution. Using dynamic compression by laser-driven shocks, pressure and temperature conditions close to what is found in these cores can be reached. However, it remains unclear whether phase boundaries determined at nanosecond timescales agree with static compression. Here we observed the presence of solid hexagonal close-packed iron at 170 GPa and 4,150 K, in a part of the iron phase diagram, where either a different solid structure or liquid iron has been proposed. This X-ray diffraction experiment confirms that laser compression is suitable for studying iron at conditions of deep planetary interiors difficult to achieve with static compression techniques.
U2 - 10.1073/pnas.1512127113
DO - 10.1073/pnas.1512127113
M3 - Article
SN - 0027-8424
VL - 113
SP - 7745
EP - 7749
JO - Proceedings of the National Academy of Sciences
JF - Proceedings of the National Academy of Sciences
IS - 28
ER -