Transmission gratings that diffract 8 keV x rays

Bionta, R. M.
September 1987
Applied Physics Letters;9/7/1987, Vol. 51 Issue 10, p725
Academic Journal
We have created and characterized a transmissive diffraction grating that disperses 8 keV x rays. The grating has a period of 7077±70 Å and consists of opaque zones of Ta separated by transparent zones of Al. It was fabricated by sputtering alternating layers of Al and Ta onto a glass optical flat and then slicing the coating into a 17-μm-thick slab. We tested the performance of the grating against a theoretical prediction by exposing the grating to 8 keV radiation from a Cu x-ray source and observing the interference pattern.


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