The light-induced desorption and diffusion of alkali-metal atoms in organic films are interesting fields of investigation. An impressive demonstration is given by the recently observed light-induced atomic desorption (LIAD) effect, where a huge alkali-metal atom desorption from siloxane films, previously exposed to atomic vapors, is induced by weak and nonresonant light. In this paper, experimental data and a one-dimensional theoretical model of the effect are presented. The model gives a good description of the vapor density dynamics by taking into account both the atomic diffusion inside the coating and the surface desorption. General equations are reported and discussed within the limits of experimental interest. The potential barrier at the vapor-surface interface and the activation energy for Rb in (poly)dimethylsiloxane have been determined. © 1999 The American Physical Society.
Atutov, S.N., Biancalana, V., Bicchi, P., Marinelli, C., Mariotti, E., Meucci, M., et al. (1999). Light-induced diffusion and desorption of alkali metals in a siloxane film: theory and experiment. PHYSICAL REVIEW A, 60(6), 4693-4700 [10.1103/PhysRevA.60.4693].
Light-induced diffusion and desorption of alkali metals in a siloxane film: theory and experiment
BIANCALANA, V.;BICCHI, P.;MARINELLI, C.;MARIOTTI, E.;MOI, L.
1999-01-01
Abstract
The light-induced desorption and diffusion of alkali-metal atoms in organic films are interesting fields of investigation. An impressive demonstration is given by the recently observed light-induced atomic desorption (LIAD) effect, where a huge alkali-metal atom desorption from siloxane films, previously exposed to atomic vapors, is induced by weak and nonresonant light. In this paper, experimental data and a one-dimensional theoretical model of the effect are presented. The model gives a good description of the vapor density dynamics by taking into account both the atomic diffusion inside the coating and the surface desorption. General equations are reported and discussed within the limits of experimental interest. The potential barrier at the vapor-surface interface and the activation energy for Rb in (poly)dimethylsiloxane have been determined. © 1999 The American Physical Society.File | Dimensione | Formato | |
---|---|---|---|
liadPRA.pdf
non disponibili
Tipologia:
Altro materiale allegato
Licenza:
NON PUBBLICO - Accesso privato/ristretto
Dimensione
295.41 kB
Formato
Adobe PDF
|
295.41 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
https://hdl.handle.net/11365/23606
Attenzione
Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo