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State-resolved dynamics of infrared photodesorption of CO from Ag(111)

Journal:
Proceedings of the SPIE - The International Society for Optical Engineering


Issue Date:
1995


Abstract(summary):

We present state-resolved measurements for IR (1.17 eV, 1064 nm) photodesorption of CO physisorbed on a Ag(lll) surface. State-resolved detection of desorbed CO is performed via (1+1') resonant multiphoton ionization (REMPI) using coherent VUV radiation and time-of-flight mass spectrometry. The observed rotational and translational state distributions are well described by Maxwell-Boltzmann distributions with characteristic temperatures which indicate near equilibration of the rotational and translational degrees of freedom. These results are consistent with a photo-induced "thermal" desorption mechanism and are compared with the predictions of the classical heat-diffusion model


Page:
298---309309


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