Isotope Mass Fractionation Process Caused by Evaporation and Condensation in the Primordial Solar nebula

摘要

The isotope mass fractionations of various refractory inclusions observed in the primitive materials as well as its estimated thermal origin are reviewed, which are generally inconsistent with the origins estimated by other procedures. The temperature dependence was studied for the mass fractionation of condensates produced form Mg-silicate gas in the evaporation-condensation experiment. The ~26Mg/~24Mg values of the condensates with respect to the starting material fractionted both in the heavy and light isotopes.