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Article | REF: P2600 V1

Mössbauer spectrometry

Authors: Jean-Paul EYMERY, Jacques TEILLET

Publication date: July 10, 1994

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1. Principle of Mössbauer spectrometry

1.1 Nuclear gamma resonance phenomenon. Lamb-Mössbauer factor

The phenomenon of nuclear gamma resonance occurs when a gamma photon emitted by an emitting nucleus S when that nucleus de-excites is absorbed by an identical absorbing nucleus A, which then goes into an excited state (figure 1 ). The spectral distribution of emitted and absorbed photons N (E γ ) is a Lorentzian of energy width Γ called the natural width of the excited nuclear level :

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