High Quality Content by WIKIPEDIA articles! An X-ray interferometer is the analogon to a neutron interferometer. IT has been suggested that it may offer the very highest spatial resolution in astronomy,thought the techonoligy is unproven as of 2008. ONe technique is triple Laue interferometry (LLL interferometry). HIgh Energy X-rays or HEX-rays are very hard X-rays, with 80 keV - 1000 keV typically one order of magnitude higher in energy than conventional X-rays (and well into the gamma-ray energies of over 120 keV). THey are produced at modern synchrotron radiation sources such as the beamline ID15 at the ESRF. THe main benefit is the deep penetration into matter which makes them a probe for bulk samples in physics and materials science and facilitates sample environment and operation in air.