Equilibrium isotope fractionation is the partial separation of isotopes between two or more substances in chemical equilibrium. ... Kinetic fractionation is a process that separates stable isotopes from each other by their mass. ... A kinetic system involving at least three isotopes of a given element is needed to identify a so-called mass independent isotope effect. ...
Isotopicfractionation therefore will be much smaller than elemental fractionation.
Thus, if isotopicfractionation exists, different solar wind regimes would be expected to have different amounts of fractionation leading to interregime isotope variations.
Thus, comparisons of isotopic abundances for elements widely separated in mass are important; consequently, measurements of C and Xe plus other noble gases, in different regimes have a high priority (Measurement objectives 4 and 6, proposal Table 1-2).
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