| Autor: |
Ivanov, I. G., Latush, E. L., Papakin, V. F., Sém, M. F. |
| Zdroj: |
Russian Physics Journal; August 1972, Vol. 15 Issue: 8 p1149-1153, 5p |
| Abstrakt: |
The rate of pumping by electron impact from the cadmium atom ground state and by the Penning process Cd II ? = 4416 å upper transition level are calculated on the basis of a measurement of the electron temperature, density of charged particles, and density of metastable and excited helium atoms as well as the known cross sections. The pumping rate to the upper level is determined independently from observations of the side spontaneous emission of the tube and measurements of the fundamental He-Cd lasing parameters. A comparison of the measured pumping rate with the calculated values shows that the Penning process, involving other excited helium atoms as well as metastables, is a dominant factor in the filling of the upper level under optimum conditions. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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