Slow Neutron Scattering by Ferromagnetic Crystals

Abstract

Consideration is made of the predictions of the Bloch spin wave model within its region of approximate validity, for the magnetic scattering of very slow neutrons by a ferromagnetic It is found that observable peaks of intensity in the angular distribution of scattered neutrons occur due to spin wave absorption Neutrons are also scattered with phonon absorption and by an analogous calculation it can be shown that similar peaks occur due to this vibrational scattering. A possible method is suggested of differentiating between the two kinds of scattering in order to provide a check of the Bloch model