التفاصيل البيبلوغرافية
| العنوان: |
Uncertainty budget for determinations of mean isomer shift from Mössbauer spectra. |
| المؤلفون: |
Fock, Jeppe jepf@nanotech.dtu.dk, Bogart, Lara1, Posth, Oliver2, Hansen, Mikkel3, Pankhurst, Quentin1, Frandsen, Cathrine4 fraca@fysik.dtu.dk |
| المصدر: |
Hyperfine Interactions. 2/18/2016, Vol. 237 Issue 1, p1-11. 11p. |
| مصطلحات موضوعية: |
*MOSSBAUER effect, *ISOMERS, *MAGNETITE, *MAGHEMITE, *SPECTROMETERS, *DOPPLER effect |
| مستخلص: |
The magnetite/maghemite content within iron oxide nanoparticles can be determined using the mean isomer shift ( $\overline {\delta }$). However, accurate characterisation of the composition is limited by the uncertainty associated with $\overline {\delta }$. We have identified four independent sources of uncertainty and developed a quantitative expression for the uncertainty budget. Sources of uncertainty are categorised as follows: that from the fitting of the Mössbauer spectrum ( σ), that of the calibration of the α-Fe reference spectrum ( σ), thermal corrections to the spectrum due to second order Doppler shift (SODS) ( σ) and other experimental errors ( σ). Each contribution is discussed in detail using Fe Mössbauer spectra obtained from an iron oxide nanoparticle system at temperatures between 16 K and 295 K on different spectrometers in two different laboratories. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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