Laser-induced desorption of Na-dimers |
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| Authors: | J Viereck M Stuke F Träger |
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| Institution: | Fachbereich Physik, Universit?t Kassel, Heinrich-Plett-Str. 40, D-34132 Kassel, Germany (Fax: +49-561-804-4518, E-mail: Traeger@physik.uni-kassel.de), DE
Max-Planck-Institut für biophysikalische Chemie, P.O.Box 2841, D-37018 G?ttingen, Germany, DE
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| Abstract: | We find that Na-dimers are desorbed in a thermal process if rough Na surfaces are irradiated with pulsed laser light of λ=532 nm.
In contrast, for light of λ=355 nm, Na2 can be detached in a non-thermal reaction at low laser fluences. This is concluded from the kinetic energy distributions
of the dimers determined by time-of-flight measurements using a second laser at λ=248 nm for photoionization. The transition
from non-thermal to thermal desorption at large fluences of the laser light can also be identified.
Received: 23 July 1996 / Accepted: 26 August 1996 |
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| Keywords: | PACS:61 80 Ba 68 55 Jk 79 20 Ds 36 40 |
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