Interference of Nuclear Bragg Scattered X-Rays in X-Ray Interferometer with Large Optical Path Difference

Abstract

Interferometry of the nuclear Bragg scattered X-rays from 57Fe2O3 (777) with the optical path difference of 2.4 mm was reported. In order to carry out this measurement, a new X-ray interferometer of the wavefront-dividing type was designed and fabricated. The interference pattern was observed using this X-ray interferometer, since the temporal coherence length of the nuclear resonantly scattered X-rays is much longer than the optical path difference. From the visibility of the interference pattern, the vertical size of the X-ray source was estimated to be 50 µ m.