Study of Bridgman phases of CCL4 model molecular crystal with the time-of-flight neutron diffractometer

Neutron diffraction study of Bridgman's phases of CCl4 has been performed with a time-of-flight diffractometer. In order to achieve high pressure a cell of cylinder-piston type was used. The cell has 120 deg horizontal window, the inside part of the cell was made of Ti-Zr alloy having the neutron, coherent scattering amplitude is equal to zero. The diffraction spectra at room temperature and pressure up to 11 kbar were measured by position-sensitive detector at 1-10 A neutron wave-length interval and ∼ 10 deg scattering angle interval. The middle scattering angle was changed from 25 deg to 80 deg. Such mode of spectrum measurement allowed one to observe the creation of CCl4 single crystal with large blocks, polycrystallization of a sample during the phase boundary crossing and the appearance of texture. The diffraction spectrum of phase 3 CCl4(P≥7 kbar) is in good agreement with the data available