Spectroscopy of ultracold neutrons using diffraction by a moving grating

TL;DR

This paper reports on the measurement of ultracold neutron spectra using a time-of-flight Fourier spectrometer, observing multiple diffraction orders and confirming theoretical predictions with experimental data.

Contribution

It presents the first experimental measurement of ultracold neutron spectra using diffraction by a moving grating, validating multiwave dynamical theory.

Findings

Observation of five diffraction orders simultaneously

Good agreement between experimental data and theoretical predictions

Validation of multiwave dynamical theory for neutron diffraction

Abstract

Spectra of ultracold neutrons that appeared in experiments on neutron diffraction by a moving grating were measured using the time-of-flight Fourier spectrometer. Diffraction lines of five orders were observed simultaneously. The obtained data are in good agreement with the theoretical predictions based on the multiwave dynamical theory of neutron diffraction by a moving grating.