Light-induced potassium desorption from polydimethylsiloxane film

Year: 2004

Authors: Gozzini S., Lucchesini A.

Autors Affiliation: Istituto per i Processi Chimico-Fisici del Consiglio Nazionale delle Ricerche, Area della Ricerca, Via G. Moruzzi 1, 56124 Pisa, Italy

Abstract: Potassium photoejection from polydimethylsiloxane surfaces has been observed and analyzed in detail. By diode laser absorption spectroscopy the K concentration in a sealed measurement cell without buffer gas has been monitored as a function of the environment variables, like temperature, flooding light wavelength and power. The dynamic evolution of the process has been measured too, showing differences compared to previous measurements with different alkali-metal atoms. Saturation spectroscopy on the K D-1 line has been performed at room temperature by taking advantage of this phenomenon.


Volume: 28 (2)      Pages from: 157  to: 162

KeyWords: Atomic physics; Photon stimulated desorption; laser diode; potassium; polymer
DOI: 10.1140/epjd/e2003-00300-9

Citations: 29
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