Non-thermal kinetic-energy distributions of desorbed Na dimers
Abstract
Experiments are reported which demonstrate that Na dimers can be desorbed in a non-thermal reaction if rough Na surfaces are irradiated with pulsed laser light of λ = 355 nm at low laser fluences. This follows from the kinetic-energy distributions of the dimers, which were determined by time-of-flight measurements using a second laser at λ = 248 nm for photoionization. The rate of desorbed dimers can even surmount the rate of detached atoms. Obviously, the dimers constitute highly stable sub-units of the surface which can be released without breaking into individual atoms.
- Publication:
-
Surface Science
- Pub Date:
- April 1997
- DOI:
- 10.1016/S0039-6028(96)01467-7
- Bibcode:
- 1997SurSc.377..687V