CIDS Calculations on Quartz at Hard X-Ray Wavelengths
When the prospect of performing optical activity experiments at short wavelengths is discussed, it is natural to ask how large optical activity effects will be at short wavelengths, and what is the mechanism by which these effects arise? As a first step toward answering these questions, we report here an attempt to calculate the circular intensity differential scattering (CIDS) of α-quartz, an optically active crystal with a helical unit cell. The calculation was ultimately not quantitatively successful, and a somewhat different approach is perhaps necessary. But despite these shortcomings some useful conclusions can be drawn, especially concerning the mechanism by which optical activity arises at X-ray wavelengths.
KeywordsOptical Activity Born Approximation Internal Field Incident Field Internal Electric Field
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