X-ray resonance in crystal cavities: realization of Fabry-Perot resonator for hard x rays |
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Authors: | Chang S-L Stetsko Yu P Tang M-T Lee Y-R Sun W-H Yabashi M Ishikawa T |
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Institution: | Department of Physics, National Tsing Hua University (NTHU), Hsinchu, Taiwan 300, Republic of China. slchang@phys.nthu.edu.tw |
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Abstract: | X-ray back diffraction from monolithic two silicon crystal plates of 25-150 microm thickness and a 40-150 microm gap using synchrotron radiation of energy resolution DeltaE = 0.36 meV at 14.4388 keV clearly show 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 wave fields 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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