Dynamic theory of neutron diffraction from a moving grating

Abstract

In the framework of the approximation of slowly varying amplitudes a multiwave dynamical theory of neutron diffraction on a moving phase grating was developed. The influence of the velocity of the grating, its period and height of the slits on the discrete energy spectrum and intensity of various diffraction orders was analyzed. *

Spectroscopy of ultracold neutrons diffracted by a moving grating

“…In spite of the fact that the first measurements were made with not very high statistics the results allow a reliable comparison with the theoretical prediction. The obtained data testify that the experiment is in rather satisfactory agreement with the theoretical predictions based on the multiwave dynamical theory of neutron diffraction in the approximation of slowly changing amplitudes [38].…”

“…It became evident that the phenomenon of neutron diffraction by a moving grating should be investigated in more detail. The results of [38] contributed to a better understanding of the theoretical aspects of the phenomenon. The present work is a new step in its experimental investigation.…”

“…In a recent paper [38] the problem of neutron diffraction by a moving three-dimensional (3D) grating was analyzed in the framework of the dynamical theory when waves of different orders interact with each other as they propagate through the grating material. Below we present some results of this work.…”

“…The continuation of this research [36,37] and recent theoretical results [38] have brought us to the understanding of the need for more detailed investigation of UCN spectra in diffraction by a moving grating. Unfortunately, the gravity spectrometry with interference filters used in Refs.…”

Comparison of ultracold neutron sources for fundamental physics measurements

“…Refs. in [1,23] or [24,25]), and tests of the weak equivalence principle for the neutron [26][27][28][29] or the theory of neutron diffraction [29,30]. Measurements of gravitationally bound quantum states of neutrons have been used for example for a high sensitivity search of deviations from Newton's gravity law on the sub-millimeter scale [31][32][33].…”