Charge transfer of Ti4+ with Ar and N2 at electron-volt energy

The charge-transfer reactions of ground state Ti4+ (3p6, 1S) with Ar and N2 were studied in a quadrupole r.f. ion trap at the mean collision energy of 4.55 eV. The rate coefficients were measured to be 1.06(0.14)×10−9 cm3/s for Ti4+ with Ar at an equilibrium temperature of 1.6×104 K and 7.45(0.38)×10−10 cm3/s for Ti4+ with N2 at an equilibrium temperature of 1.3×104 K. Both results are comparable with the Langevin rate coefficients.