Fig. 4: Temporal variation of nuclear coordinates.
From: Ultrafast probing of isotope-induced explicit symmetry breaking in ethylene
a The temporal evolution of the dihedral angle, ∣Φ∣, defined by H3C1C2H6 (solid lines) and H3C1C2H5 (dashed lines) in different isotopologues (12C2H4 in red, 13C2H4 in green, and 13C12CH4 in blue) upon excitation to the D3 electronic state. b The same as a but for the distance, d, between carbon atom C1 and hydrogen atom H5. c Once again the same as a but for the angle, α, identified by atoms H5C2C1. The inset in each case shows the corresponding definition for the coordinate. d The time dependent variation of the average normal mode (CH2 scissoring) displacements. In all the analyses the frames in which H-loss and H2 or, 2H-loss takes place are excluded.
