Surface Phenomena in the Ionization Chamber of the Mass Spectrometer Ion Source

The resonance interaction of ionizing electrons with 7,7,8,8-tetracyanoquinodimethane (TCNQ) molecules was studied by negative-ion mass spectrometry. The installation of an energy filter in the ion source confirmed the possibility of a dissociation process on the surface of the ionization chamber of the ion source. The formation of negative fragment ions through a dissociation channel based on the Schottky effect was demonstrated.