Iodine Mössbauer-effect sources in the form of Mg3TeO6 and Ca3TeO6 were developed. Due to the unusual solid state properties of these crystals and the high coordination symmetry of Te in their matrices, it is possible to obtain single and narrow emission lines with a recoilless fraction at room temperature of 0.55, ten times larger than that of the conventional Zn and Sn telluride sources. The compounds can be prepared and repeatedly irradiated without any perceivable radiation damage and with negligible residual activity from the other constituent elements. This allows for the first time the use of 129I Mössbauer spectroscopy at room temperature and significantly improves the performance of 127I at low temperatures. It is suggested to adopt the Mg3TeO6 as a standard iodine Mössbauer source.
|Number of pages||3|
|Journal||Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms|
|State||Published - Jun 1984|