Shock temperature and reflectivity of precompressed H2O up to 350 GPa: Approaching the interior of planets*

Project supported by the National Key Research and Development Program of China (Grant No. 2017YFA0403200) and the Science Challenge Project (Grant No. TZ2016001).
He Zhi-Yu1, Shu Hua1, Huang Xiu-Guang1, 2, Zhang Qi-Li3, Jia Guo1, Zhang Fan1, †, Tu Yu-Chun1, Wang Jun-Yue4, Ye Jun-Jian1, Xie Zhi-Yong1, Fang Zhi-Heng1, Pei Wen-Bing1, 2, Fu Si-Zu1, 2
       

(color online) (a) Reflectivity as a function of shock velocity in this work (blue squares), together with experimental data of Celliers et al.[46] (open pink circles) and Kimura et al.[11] (open green circles). Fits to our data (blue solid line) are also shown; (b) Drude reflectivity as a function of carrier density at the VISAR wavelength of 660 nm (red solid line) and SOP wavelength of 442 nm (red dashed line). Difference in reflectivity between the two wavelengths is shown by the blue line. Carrier density corresponding to the maximum reflectivity from our data is marked with a cyan dashed line.