Raman measurements play an important role in examining the molecular changes associated with shock-induced structural and chemical changes in condensed materials.We combine a high spectra-resolution Raman system with ...Raman measurements play an important role in examining the molecular changes associated with shock-induced structural and chemical changes in condensed materials.We combine a high spectra-resolution Raman system with a two-stage light gas gun to provide better quality data than the transient Raman system used previously.Representative measurements are presented for the shock compression of benzene.The high spectral resolution data have provided an insight into molecular changes that could not be obtained from time-resolved methods.展开更多
We combine the flyer-impact experiment and improve the finite difference method to solve whether the shear viscosity coefficient of shock iron is more reliable.We find that the numerical simulated profile agrees well ...We combine the flyer-impact experiment and improve the finite difference method to solve whether the shear viscosity coefficient of shock iron is more reliable.We find that the numerical simulated profile agrees well with the measured one,from which the determined effective shear viscosity coefficients of shocked iron are 3000±100 Pa-sand 4000±100 Pa-s,respectively,at 103 GPa and 159 GPa.These values are more than 2000±300 Pa-s of Li Y L et al.[Chin.Phys.Lett.26(2009)038301]Our values are more reasonable because they are obtained from a comprehensive simulation for the full-shocked perturbation evolving process.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 10874141,10974160the Foundation of Central Universities under Grant No SWJTU112T23。
文摘Raman measurements play an important role in examining the molecular changes associated with shock-induced structural and chemical changes in condensed materials.We combine a high spectra-resolution Raman system with a two-stage light gas gun to provide better quality data than the transient Raman system used previously.Representative measurements are presented for the shock compression of benzene.The high spectral resolution data have provided an insight into molecular changes that could not be obtained from time-resolved methods.
基金Supported by the National Natural Science Foundation of China under Grant Nos 11002120 and 10974160.
文摘We combine the flyer-impact experiment and improve the finite difference method to solve whether the shear viscosity coefficient of shock iron is more reliable.We find that the numerical simulated profile agrees well with the measured one,from which the determined effective shear viscosity coefficients of shocked iron are 3000±100 Pa-sand 4000±100 Pa-s,respectively,at 103 GPa and 159 GPa.These values are more than 2000±300 Pa-s of Li Y L et al.[Chin.Phys.Lett.26(2009)038301]Our values are more reasonable because they are obtained from a comprehensive simulation for the full-shocked perturbation evolving process.
