Rapid Mössbauer-based methods for the determination of iron-bearing phases

Abstract

The variation of Mössbauer γ-ray resonant absorption with the velocity amplitude of a vibrating γ-ray source is examined theoretically in connection with Mössbauer-based methods for rapid, nondestructive determination of iron-bearing phases in different materials. The theoretical analysis can be used to simulate such methods, which are based on the difference in the Mössbauer resonant absorption by a sample with the γ-ray source stationary and in rapid oscillation. Methods for the determination of pyrite in coal and metallic forms of iron in steels and slags are examined both theoretically and experimentally to illustrate the advantages and limitations of such rapid Mössbauer-based methods.