Near-fields temperature impact

IMPACT OF TEMPERATURE INCREASE ON NUCLIDE TRANSPORT IN CRYSTALLINE ROCK ON THE NEAR FIELD SCALE... [Pg.413]

The ion source is a custom designed variable temperature EI/CI source. Metal containing precursor ions are formed by electron impact (150 eV) ionization and fragmentation of volatile precursors such as Fe(CO)5 Co(CO)3NO. T ical source pressures are lO torr, and source temperatures are kept below 280 K to minimize decomposition of the organometallics on insulating surfaces. Adduct formation results from reaction of an atomic metal ion or metal containing species with small molecules. The ion source is operated under nearly field free conditions to prevent translational excitation of the ions, which are accelerated to 8 kV before mass analysis. [Pg.36]

When applying nonequilibrium methods it is important not to increase the probability of impact ionization, i.e., the effective temperature of carriers must not be elevated too much. Nonequilibrium methods are used for relatively weak fields, out of the hot electron range, but near to it. [Pg.130]