X-Ray Extinction in Piezoelectrically Oscillating Quartz

Fox and Fraser1 have investigated the extinction of x-rays in piezoelectric quartz crystals by photographic methods for both the oscillating and non-oscillating cases. Apparent increased blackening of the photographic plate was observed for both the diffracted and central x-ray beams. Jauncey and Deming 2 have performed a similar experiment on extinction using an ionization chamber and electrometer and have obtained results which are in disagreement with those of Fox and Fraser in regard to the central beam. We are repeating these observations using an ionization chamber and an electrometer tube to check the results of either of the above investigations. The evidence so far seems to give support to the work of Jauncey and Deming regarding the central beam