Abstract
The Mossbauer re-emission spectrum in Fe/sup 57/ is studied. A Co/sup 57/ gamma source is mounted on a speaker, which is driven at 11 cps. The re- emission of these rays is measured by a NaI scintillation crystal. Since internal conversion in Fe/sup 57/ competes with gamma re-emission, a proportional counter is provided for measuring the 6.3 ksv x-rays which are emitted by Fe/sup 57/ following K-conversion. The spectra of gamma- and x-ray transmission are given as functions of relative source-abaorber velocities. The use of this method in investigation of Mossbauer spectra of highly converted gamma rays is suggested. (T.F.H.)
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