Grazing incidence spin-echo neutron spectrometer

Abstract

A device for the excitation and detection of neutron magnetic-moment precession, consisting of a pair of magnetic mirrors placed in a magnetic field, is discussed. The device may be used as the phase-shifting element in a spin-echo neutron spectrometer, which measures the correlation time of the oscillations of a medium or the correlation length of its density. It is shown that in a magnetic field with an intensity of up to 1 kOe, the probability of neutron scattering can be measured from the minimum values of the wave vector of 10^–7 Å^–1 and the transmitted energy of 1 peV.