2003/05/10 by Wolfgang Sturhahn, Caroline L'abbe, Thomas S. Toellner · 1 citation
Physics and Astronomy · #physics.optics #physics.gen-ph
paper · pdf · doi:10.1209/epl/i2003-10235-7
published as Europhysics Letters 16, 2004, pp 506-512 · 4 pages, 4 figures
arxiv created 2003/05/10 · arxiv updated 2009/12/01
The time-dependent phase change of x rays after transmission through a sample has been determined experimentally. We used an x-ray interferometer with a reference sample containing sharp nuclear resonances to prepare a phase-controlled x-ray beam. A sample with similar resonances was placed in the beam but outside of the interferometer; hence our use of the term ``exo-interferometric.'' We show that the phase change of the x rays due to the sample can be uniquely determined from the time-dependent transmitted intensities. The energy response of the sample was reconstructed from the phase and the intensity data with a resolution of 23neV.