Competition between binary ion molecule reactions and ternary association reactions of CH+3 with NH3 in He buffer gas in the pressure range 0.2–1.7 Torr

The binary reaction of CH+3 with NH3 as well as their ternary association have been investigated in the regime from 0.047 to 0.2 eV, KEcm, using the Innsbruck selected ion drift tube (SIDT). In this energy regime the association rate coefficient declines from 4×10−26 to 6×10−27 cm6 s−1 and the lifetimes of the collision complex (CH+3−NH3)* range from ∼10−7 to ∼10−8 s.