Collisional studies involving ${\mathrm{N}}^{+}$ and ${\mathrm{N}}_2^{+}$ ions and Hg $X_2$ (X=Cl, Br, and I)

Charge transfer reactions involving collisions of ${\mathrm{N}}^{+}$ and $N_2^{+}$ ions and Hg$X_2$ (X=Cl, Br, and I) molecules have been studied in the kinetic energy range of 1–1000 eV (laboratory frame). Emission spectra from the (B-X) transition of HgX radicals as well as mercury atomic lines from various highly excited energy levels have been observed and analyzed. By using the integrated intensity of the most intense bands of HgX (X=Br or I) radicals and strong mercury atomic lines, emission cross sections have been measured at various laboratory kinetic energies of the projectile ions.