2009 Advanced Laboratories Conference Abstract Detail Page
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||Participants will be shown the Mössbauer Effect experiment done at the University of Chicago.
Students typically measure
The Austin Scientific apparatus consists of a magnetically driven rod, which moves a Co-57 source with a constant acceleration. The resulting Doppler-shifted Co-57 photons have a range of energies which span the resonant absorption energy of nuclei in a stationary absorber. Photons not absorbed by the stationary nuclei are detected in a proportional counter. Students use a laser and Michelson interferometer to determine the velocity of the source at each point in the spectrum.
- the natural line width of a nuclear transition
- nuclear Zeeman splitting
- magnetic quadrupole splitting of nuclear energy levels
- chemical shift of nuclear energy levels
A multi-channel analyzer/multi-channel scaler is used to obtain and display the Mössbauer spectra. Various absorbers are provided, placing the Co-57 nuclei in a variety of lattice environments. We hope to show the participants one technique for obtaining Mössbauer spectra and a start on their interpretation.
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||Session XI - Parallel Workshops
University of Chicago