Nonthermal photodesorption of N{sub 2} from Ag(111)
Journal Article
·
· Journal of Chemical Physics
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)
We have measured translational and rotational energy distributions of N{sub 2} molecules following desorption from a Ag(111) surface by infrared (1064 nm) radiation. The observed desorption yields were large even at laser fluences far below that required for laser-induced thermal desorption. State-resolved laser techniques using coherent VUV radiation showed that the rotational and translational energy distributions of the desorbing N{sub 2} molecules are not consistent with the predictions of the heat diffusion model governing laser-induced surface heating. These results suggest that physisorbed adsorbates can couple directly to the nascent-phonon distribution or the nascent electron{endash}hole pairs in the photoexcited substrate without heating of the surface. {copyright} {ital 1998 American Institute of Physics.}
- OSTI ID:
- 663690
- Journal Information:
- Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 18 Vol. 109; ISSN JCPSA6; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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