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isomer shift

in Mössbauer spectroscopy
Measure of the energy difference between the source (E s) and the absorber(E a) transition. The measured Doppler velocity shift, δ, is related to the energy difference by
E a − E s = δ E γ c
where E γ is the Mössbauer gamma energy and c is the speed of light in vacuum.
PAC, 1976, 45, 211 (Nomenclature and Conventions for Reporting Mossbauer Spectroscopic Data) on page 214
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IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
Last update: 2014-02-24; version: 2.3.3.
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