pulse X-Ray Diffraction Study of Shock-Compressed NaCl

Abstract: Results of X-ray diffraction study of shock-compressed NaCl single crystals of <loo> orientation are suggested. A new geometry of X-my diffraction survey specially developed for studies of a single crystalk&nple in the monochromatic radiation was employed to obtain a multi-peak diffraction pattern allowing the complete determination of the components of the crystal strain tensor. During the compression of the crystals their state was continuously monitored by velocity interferometer. The diffraction patterns obtained at the different regions of the plastic wave front evident that the crystal is able to maintain the state of unidimensional compression up to the strain level of about 0.06. Resum6: La compression par choc d'un cristal NaCl dans la direction <LOO> esr etudike i I ' ide de la diffraction des rayons X. Une geomeuie nouvelle d'analyse de diffraction?i rayons X dtveloppee specialement pour I'ktude d'kchantillon monocristallins soumise?i un rayonnement monochrome est employee afin d'ohtenir un motif?i diffraction multi-cr&te pennettant de determiner compl2tement les composantes du tellseur de tension du cristal. L'etat ~ i u cristal est contr6lt condnuellement par un interftrom?ue de vitesse. Les raies de diffraction obtenues pour des regions differentes du front d'onde plastique monuent que le crisral est capable de supporter I'ktat de compression monodimms~onnelle jusqu'g un niveau de [ension d'environ 0,06. 1