Effects of laser pulse characteristics and thermal desorption parameters on laser induced thermal desorption
โ Scribed by J.L. Brand; S.M. George
- Publisher
- Elsevier Science
- Year
- 1986
- Weight
- 43 KB
- Volume
- 167
- Category
- Article
- ISSN
- 0167-2584
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Surface diffusion of deuterium and hydrogen on Pt(ll1) has been investigated by laser-induced thermal desorption. As the initial surface coverage of deuterium is varied from 0.001 to 0.33, the diffusional activation energy falls from 12 to 7 kcal/mol, and the pre-exponential factor falls from 3 x lo
A theory of a desorption induced by an infrared laser 1s developed. The laser excites an anharmonic molecule to the fust exctted level and higher vibrational levels are achieved by mtermolecular energy transfer. Once the molecu!z: is extired to the higher levels It may desorb. It 1~. shown that a fr