Fig. 4. Classical molecular dynamics simulation.

a Normalized yield of each breakup channel of ${\mathrm{CH}}_4^{+}$ trajectories. b f₂ stretching mode can lead to C_3v geometry and contribute to ${\mathrm{CH}}_3^{+}+{\mathrm{H}}^{+}$ channel. c e bending mode, d f₂ stretching mode, and e f₂ bending mode can lead to D_2d or C_2v geometry and contribute to ${\mathrm{CH}}_2^{+}+{\mathrm{H}}_2^{+}$ channel.