isomeric shift

isomeric shift

[¦ī·sə¦mer·ik ′shift]
(physical chemistry)
Shift in the Mössbauer resonance caused by the effect of the valence of the atom on the interaction of the electron density at the nucleus with the nuclear charge. Also known as chemical shift.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
By doing this, we can identify three signals with different isomeric shifts. The first one is a sextet corresponding to [Fe.sup.0], while the other two signals come from [Fe.sup.+2] and [Fe.sup.+3] ions as evidenced by the corresponding isomeric shift for each species (0.10 mm/s for [Fe.sup.+3] and 0.42 mm/s for [Fe.sup.+2]).
As seen, the isomeric shift of the two present signals corresponds to [Fe.sup.+3] species that are from the mixture of iron oxide and iron oxide-hydroxide.