Combining a low temperature liquidizing system with a transient Raman spectroscopy, a new experimental technique is established for the first time on a two-stage light-gas gun, and it is employed to study shock-compressed fluid silane. With this experimental technique, we first obtain a Raman peak shift relating to the Si-H stretching vibration mode of molecular liquid silane under shock loading conditions. The Raman peak of 2184 cm-1 at an initial state of 0 GPa and 85 K moves to 2223.4 cm-1 at a shocked state of 10.5 GPa and 950 K, and its full width of half maximum broadens from 33 cm-1 to 118 cm-1. The shocked temperature, calculated by the thermodynamic equation of state, is well consistent with that estimated by the Doppler broadening function.
Project supported by the National Natural Science Foundation of China (Grant Nos. 11574254 and 11272296), the National Basic Research Program of China (Grant No. 2011CB808201), the Fundamental Research Fund for the Central Universities, China (Grant No. 2682014ZT31), the Scientific Research Plan Projects of Shannxi Provincial Education Department, China (Grant No. 16JK1361), and the Scientific and Technological Research Program of Chongqing Municipal Education Commission, China (Grant No. KJ1600520).
- Yi-Gao Wang, Fu-Sheng Liu, Qi-Jun Liu, Wen-Peng Wang, Ming-Jian Zhang, Feng Xi, Ling-Cang Cai, Ning-Chao Zhang. Measurement of transient Raman spectrum on gas-gun loading platform and its application in liquid silane[J]. Chin. Phys. B, 2017, 26(10): 103301.