Combination Two-Circle Goniometer and X-ray Spectrometer.

摘要

A combination instrument consisting of a two-circle goniometer and x-ray spectrometer suitable for the study of crystals was designed and fabricated in Squier Signal Laboratory. A crystal can be oriented optically by using the instrument as a goniometer. X-ray techniques can then be used to study the crystal by replacing collimator and telescope with an x-ray slit system and a Geiger counter. Absolute intensity measurements he made by fixing the Geiger counter at twice the Bragg angle and rotating the crystal at 8 deg per hour from Theta sub Bragg - Delta Theta to Theta sub Bragg + Delta Theta. Back reflection angles of up to 160 deg are obtainable. The result of a test on synthetic halite (400) reflection, gave a structure factor 12.7 compared with Max Renniger's value of 12.67. No absorption corrections are required with this technique of measuring intensities. (MM).