Glr. Mair et al., Doubly-charged ions from liquid metal alloy ion sources: direct field-evaporation or post-ionization?, J PHYS D, 33(17), 2000, pp. L86-L89
We investigate the temperature dependence of the mass spectrum of the ion b
eam emitted by an Au77Ge14Si9 liquid metal alloy ion source. Our results st
rongly point towards the co-existence of two mechanisms for the emission of
doubly-charged monomer ions: direct field evaporation and post-ionization.