Experiments on the search for the effect of resonant screening on the probability of Mössbauer absorption of 119m Sn gamma rays

Abstract

Experiments on the search for the effect of resonant screening on the Mossbauer absorption of 119mSn γ rays of energy 23.8 keV emitted by a standard Mossbauer Ca119mSnO3 γ source in the resonant SnO2 absorber of natural isotopic composition are described. Intensities of tin γ rays and X-rays that passed through the absorber were measured with and without a resonant cylindrical screen (which was a black absorber for the 23.8-keV Mossbauer γ line) around the absorber and their ratios were calculated for each radiation separately. No difference beyond the experimental error was found between these ratios measured with the γ source both at rest and when oscillating with a frequency and amplitude enough to completely break the conditions for Mossbauer resonant absorption of 23.8-keV γ rays. The upper limit for the relative decrease, due to the influence of the resonant screen, in the intensities of these γ rays after their passing through the resonant absorber was 0.00030.