Models for Molecular Secondary Ions

The far greater theoretical complexity associated with describing the emission of bound atoms moving at a slower velocity relative to their atomic ion counterparts 

The greater difficulty associated with recording sputtered neutral molec-ular/cluster distributions of the respective secondary ions of interest (that being said, improvements in post-ionization methods are noted Marazov et al. 2006) 

The far fewer empirical studies carried out in this area. Note The recent advent of molecular depth profiling and imaging in all three dimensions has, however, spawned new interest in this area 

The Selvedge concept introduced by the Rabalais team (Honda et al. 1978 Lancaster etal. 1979 Murray 1981) 

The Gas Flow model formulated by the Michl team (Orth et al. 1982) 

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