Development of Techniques for the Application of Moessbauer Spectroscopy in Determining SN and Fe from Rock Samples. Part of a Coordinated Programme on the Development of Methods for the Application of Moessbauer Spectroscopy in M

摘要

A portable cassiterite analyzer was designed and constructed to permit the rapid quantitative determination of tin. The Moessbauer effect produced by the Sn-119m radioactive source is used in the analysis of tine ore, in the range between 0.03 and 100%. The factors effecting the quantitative determination, such as sample granulation and matrix composition have been studied. For the analyses of iron ores, hematite, magnetite and siderite, a specialized Moessbauer analyzer was developed. The concentration of iron in ores is determined using a Co-57 radioactive source, a thin NaI scintillation detector and a Moessbauer system working in constant velocity mode. With the prototype analyzer, the effects of different external factors on the accuracy of measurements have been studied. (Atomindex citation 12:637273)