Journal Article 2 high-resolution monochromator Research Support, N.I.H., Extramural 1 Research Support, Non-U.S. Gov't 1 backward diffraction 1 coherent X-rays 1 dynamical diffraction 1 mehr ... energy position 1 energy scale 1 in situ energy calibration 1 nuclear resonant vibrational spectroscopy 1 quick-switching energy calibration 1 sapphire Fabry–Perot resonator 1 small energy shift 1 weniger ...