Visualization of Vibrational Wave Packet via Coulomb Explosion in Poly-Atomic Molecules

In this study, we apply the time-resolved Coulomb explosion imaging to visualize the vibrational wave packet of dissociating poly-atomic molecules such as C₂H₅OH (ethanol) or CH₃(CH₂)₂OH (1-propanol). It enables us to understand fundamental insight of complex multi-dimensional quantum evolution of the large molecular systems.The experiment was performed using intense pump-probe laser pulses with a 25 nm spectral width at 800 nm center wavelength. The field intensity and temporal width of both the pump and probe pulses is 2.0xl014 W/cm2 and 40fs, respectively. The pump-probe pulses were focused into the collimated molecular beam in a TOF mass spectrometer.