Mössbauer Spectroscopy
نویسنده
چکیده
Recoil-free emission of 14.37 keV lines by iron atoms undergoing radioactive decay can be exploited in high-resolution Mössbauer spectroscopy thanks to the long lifetime of the excited state. This experiment determined the natural energy width of the Mössbauer 14.37 keV line to be (1.36 ± 0.24)· 10−12 keV, giving a relative width of around 10−13. Another application of this experiment was in characterizing the Zeeman splitting of nuclear states of enriched iron thanks to the strong magnetic fields caused by the iron atoms and electrons; from this, the ratio of the ground to excited magnetic moments of the nuclear states was calculated as 1.862 ± 0.005, and the magnetic field experienced by the nucleus was found to be 352.0 ± 4.5st ± 4.6sy kgauss. Finally, the difference in the chemical environment between the decaying iron source and an iron (III) sulfate absorber caused a shift in the central energy absorbed, and this isomer shift was found to be (2.91 ± 0.24) · 10−8 eV.
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für Naturforschung in cooperation with the Max Planck Society for the Advancement of Science under a Creative Commons Attribution 4.0 International License. Dieses Werk wurde im Jahr 2013 vom Verlag Zeitschrift für Naturforschung in Zusammenarbeit mit der Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. digitalisiert und unter folgender Lizenz veröffentlicht: Creative Commons Namen...
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