Effect of vibrational relaxation on DIET: A density matrix treatment

The influence of substrate-induced vibrational relaxation on desorption ind uced by electronic transitions (DIET) is studied using a density matrix for mulation. The one-dimensional model describing the DIET dynamics of NO cons ists of two electronic states. Relaxation in both electronic and vibrationa l modes is simulated with dissipative Liouvillians of the Lindblad form. As expected, vibrational relaxation results in a smaller desorption yield and lower product translational temperature. (C) 2000 Elsevier Science B.V. Al l rights reserved.