Mössbauer Effect Facilities
The Mössbauer effect is used to determine magnetic and chemical characteristics of materials. Each atomic environment develops a particular Mössbauer pattern, resulting in a composite (as opposed to average) spectrum. Data analysis is used to deconvolute the Mössbauer spectrum into its components.
for the study of the Mössbauer effect in iron-containing materials
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Temperatures |
Magnetic Field | |
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TMS |
Transmission Mössbauer |
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TMS |
Transmission Mössbauer |
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CEMS |
Conversion Electron Mössbauer |
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TMS
- Can be used with films or powders
- Thicknesses: a few microns to about 50 microns
CEMS
- Primarily used for films, with areas about 1 cm squared
- Mean sampling depth in Fe-containing films is typically about 500 A
- No upper limit on thickness
- Some sensitivity is obtained with films as thin as 10 A
Mössbauer patterns for two iron metal particle recording tapes, before and after treatment in the accelerant Battelle Class II environment. Corrosion is seen to proceed from the surface of the tapes.
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Mössbauer TMS data comparisons before and after 3 week exposure to Battelle II environment. The upper two comparisons show Tape 1 data at 296 K and 4.2 K, and the bottom comparison shows Tape 3 data at 296 K. The post-exposure data were scaled to overlap the Fe metal sextet of the pre-exposure data. |
Mössbauer CEMS data comparisons at 296 k before and after 3 week tape exposure to Battelle II environment. The post-exposure data were scaled to overlap the Fe metal sextet of the pre-exposure data. |
