The Mössbauer Effect in W¹⁸² Studied by the Method of γ — γ Coincidence

Abstract

Observation of the Mössbauer effect /1/ in W¹⁸² is made difficult by the presence of a strong background of lines with energies greater than the resonance energy of 100 keV. Attempts to record this effect have been made by Lee, Meyer — Schutzmeister, Schiffer, and Vincent /2/ and by de Nercy, Langerin, and Spighel /3/ who studied changes in γ-ray absorption resulting from changes in temperature of the source or the absorber. Both of these attempts cannot be considered as satisfactory since, for the above-mentioned reason, the effect under observation is very slight. Recently this difficulty has been eliminated by Sumbaev, Smirnov, and Zykov /4/ by using a curved-crystal spectrometer. Since this last method involves complicated and hard-to-obtain apparatus, there is good reason to look for other methods. This, then, is the purpose of the present work.