At room temperature, approximately f = 20% of 119Sn g-decays in the BaSnO3 compound occur without recoil (Mossbauer effect). Estimate what the thickness of the source should be so that there is no noticeable absorption of Mössbauer g-quanta in it. The density of BaSnO3 is p = 3•103 kg/m3, the content of the 119Sn isotope in the natural mixture is e = 8, the energy of g-quanta is Eg = 24 keV.

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