New applications of the Mössbauer effect

© 2017, Allerton Press, Inc. Results from a Mössbauer experiment to observe acoustic oscillations induced by pulsed laser excitation in MgO: 57 Fe 2+ crystal are presented. Time-domain spectra are satsifacorily described by the theory of the frequency modulation of Mössbauer radiation transmitted through a vibrating resonance medium. It is proposed that the D 4Ω /D 2Ω ratio of the fourth and second Fourier harmonics of the modulated radiation be used to measure the amplitude of nuclear oscillations