Comment:
100 L CH3I were adsorbed onto Pd(100) at 200 K. The spectra were taken during continuous dosing at a CH3I pressure of 3.3E-6 Pa. The substrate treatment: Ar+ ion sputtering (Ep=1 keV, j=5 microamperes/cm-2), annealing (T= 1000 K), oxidation (T = 700 K), and annealing (T= 1000 K).