Choice of applied field direction for resolving electric field gradient ambiguity in Mössbauer spectra

Abstract

It is commonly believed that magnetically perturbed ⁵⁷Fe and ¹¹⁹Sn Mössbauer spectra are far easier to calculate in the parallel arrangement than in the case where γ incidence is perpendicular to the applied field. It may be shown, however, that this is not the case provided the proper choice of co-ordinates and method of averaging is used; in such a situation computing cost poses no obstacle to the use of the experimentally more convenient transverse geometry.