%0 Journal Article
%T Investigation of the pressure-volume-temperature equation of state for dense hydrogen-helium mixture using multi-shock compression method<br>用多次冲击压缩方法研究稠密氢氦等摩尔混合气体的物态方程
%A Tian Chun-Ling
%A Cai Ling-Cang
%A Gu Yun-Jun
%A Jing Fu-Qian
%A Chen Zhi-Yun
%A <br>田春玲
%A 蔡灵仓
%A 顾云军
%A 经福谦
%A 陈志云
%J 物理学报
%D 2007
%I 
%X The multi-shock Hugoniot and shock temperatures of gaseous hydrogen-helium equimolar mixture with initial pressure and temperature of - 30MPa and - 90 K have been measured up to 140 GPa using two-stage light gas gun and shock reverberation technique. Two kinds of multi-channel pyrometer systems with different sensitivities, were used in experiment for diagnostics, because the thermal radiation of the sample in the first-shock state is lower than that in the multi-shocked states by a magnitude of one to two orders. The measured pressure, volume and temperature are respectively 5GPa, 12.0 cm^3/mol and 3030 K in the first-shock state, 27 GPa, 6.7 cm^3/mol and 5070 K in the second -shock state, and 105 GPa, 4.0 cm^3/mol and 5090 K in the fourth-shock state. The results for the first- and second-shock states are well described by the fluid perturbation theory and dissociation model. It demonstrates that the dissociation of molecular hydrogen of the compressed sample is negligible in the first- shock state, while about 7% and 32% of molecular hydrogen undergo dissociation in the second- and fourth -shock states, respectively. The fourth-shock temperature measured was lower than the prediction for - 2000 K.
%K hydrogen-helium mixture
%K multiple shock compression
%K spectral radiance history
%K equation of state<br>氢、氦混合气体
%K 多次冲击压缩
%K 光谱辐射强度历史
%K 物态方程
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=D02C7C880EC4F5E5&yid=A732AF04DDA03BB3&vid=014B591DF029732F&iid=DF92D298D3FF1E6E&sid=4583D5F589081B6A&eid=42EA19A6FF06AF18&journal_id=1000-3290&journal_name=物理学报&referenced_num=1&reference_num=25