X-ray Resonance in Crystal Cavities--Realization of Fabry-Perot Resonator for Hard X-rays
S. -L. Chang, Yu. P. Stetsko, M. -T. Tang, Y. -R. Lee, W. -H. Sun, M. Yabashi, T. Ishikawa
Abstract
X-ray back diffraction from monolithic two silicon crystal plates of 25--150 um thick and a 40--150 um gap using synchrotron radiation of energy resolution deltaE=0.36 meV at 14.4388 keV shows clearly resonance fringes inside the energy gap and the total-reflection range for the (12 4 0) reflection. This cavity resonance results from the coherent interaction between the X-ray wavefields generated by the two plates with a gap smaller than the X-ray coherence length. This finding opens up new opportunities for high-resolution and phase-contrast X-ray studies, and may lead to new developments in X-ray optics.
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