Phase-energy approach to collision-induced vibrationa relaxation

摘要

A representation of the diatomic vibrational distribution function in energy and phase varibles yields a transparent physical picture of collision-induced vibrational relaxationl. In this way, the energy-and phase-relaxation processes ca be separated. A simple parametrization of the phase distribution allows for the extyraction of the dephasing time and the reconstruction of autocorrelation functions and femtosecond pump-probe signals .It is shown that the dephasing time can be derived from the Fourier spectrum of the pump-probe signal in favorable casses