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| Content Provider | EDP Sciences |
|---|---|
| Author | A. Meessen |
| Abstract | The photoelectric effect of metals is no longer considered as a surface effect but as a volume effect, determined by the following processes : (1) The penetration of light into the metal film, which is responsible for the inadequacy of measurements of the photoelectric efflciency Y per incident photon. It is preferable to refer to the efficiency Ya per absorbed photon. (2) The photoexcitation by oblique transitions, which determines the density and energy distribution of the excited electrons. (3) The portion p of excited electrons, moving to the surface in a solid angle such that the velocity normal to the surface allows emission over the potential barrier. This rapidly varying factor actually determines the spectral distribution near the threshold, especially in the approximation of the Fowler-DuBridge formula. (4) The individual or collective interactions of the excited electrons with the other electrons, which produces absorption or secondary emission of electrons. The experimental electron absorption length thus obtained for K, shows that the theory of individual electron interactions needs to be improved. Y and Y a can be calculated - with the real energy distribution of the excited electrons, assuming very. thin films - or in the monocinetic approximation, considering the influence of light penetration, electron absorption and film thickness. This method is very simple and useful. The very large photoelectric efflciency of metals such as Be in the far ultraviolet is no more than the normal prolongation of the volume effect observable near the threshold. |
| Ending Page | 320 |
| Starting Page | 308 |
| Page Count | 13 |
| File Format | HTM / HTML PDF |
| ISSN | 03683842 |
| Alternate Webpage(s) | http://dx.doi.org/10.1051/jphysrad:01961002205030800 |
| Issue Number | 5 |
| Journal | Journal de Physique et le Radium |
| Volume Number | 22 |
| DOI | 10.1051/jphysrad:01961002205030800 |
| Language | French |
| Publisher | Revue Générale de l'Electricité |
| Publisher Date | 1961-05-01 |
| Access Restriction | Subscribed |
| Content Type | Text |
| Resource Type | Article |
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