| Autor: |
Alon Hoffman, Roger Azria |
| Rok vydání: |
2001 |
| Předmět: |
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| Zdroj: |
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 182:155-161 |
| ISSN: |
0168-583X |
| DOI: |
10.1016/s0168-583x(01)00670-x |
| Popis: |
In this work, we report on the influence of surface temperature on low energy H− electron stimulated desorption (ESD) occurring via dissociative electron attachment (DEA) from hydrogenated diamond films. By measuring the H− kinetic energy distribution (KED) induced by electron bombardment in the 7–18 eV range for surface temperatures ranging between 100 and 450 K we investigate the dynamics of the desorption process. It is determined that the H− ion yield continuously decreases with increasing temperature and that the most probable H− kinetic energy shifts to lower energies. It is proposed that the effect of temperature on the H− KED and consequently on the reduction in ion yield is due to an increase in the energy relaxation cross-section of the anion resonance and energy losses of the outgoing H− ion through interactions with the solid's multi-phonon background and collisions. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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