Mass Analyzed Threshold Ionization MATI

M. S. Child I would like to ask to T. Softley what limitations apply to vibrational states of H2 + that can be prepared by the mass-analyzed threshold ionization (MATI) technique. In particular it would be interesting to known whether the states observed in Carrington s H3+ predissociation excitation experiment [1] could be more selectively prepared by the reaction... 

An alternative to PFI-ZEKE would be mass-analyzed threshold ionization (MATI), where cations rather than ZEKE electrons are detected.In principle, MATI is attractive because of the inherent mass selection. However, MATI experiments are difficult to implement because of ion separation fields affecting the high Rydberg levels required for delayed pulsed field ionizations. The technique has so far only been used for the smallest metal molecules. ... 

Gunzer, F. Grotemeyer, J. New Features in the Mass Analyzed Threshold Ionization (MATI) Spectra of Alkyl Benzenes. Phys. Chem. Chem. Phys. 2002, 4, 5966-5972. 

MATI Mass-analyzed threshold ionization— the mass spectrometry of ions produced in coincidence with zero-kinetic energy (ZEKE) electrons. 

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