The energies of excess electrons in helium
β Scribed by U. Asaf; I.T. Steinberger
- Publisher
- Elsevier Science
- Year
- 1986
- Tongue
- English
- Weight
- 394 KB
- Volume
- 128
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
The energy V, of conduction electrons in helium gas was measured by photoinjection up to a density of 3.6X 102' atoms/cm' and analysed together with results by Broomall, Johnson and Onn obtained for higher densities, including the liquid phase. The data could be well approximated by the model of Springett, Jortner and Cohen using a hard-core radius of 0.075 nm.
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The temperature dependence of rhe mobility of excess electrons in liquid methane is measured at temperatures between 91 K and 155 K. The results sqgest that the behaviour of excess electrons in molecular liquid methane has a streng simifarity to that in Iiquid argon. PreiimΓnary results are reporte
We have extended the range of electron mobility mcasuremcnts in dense helium gas at 77.3'K to pressures of 40 atm and at 160Β°K to 80 atm. Coexisting high and low mobility branches were found at both temperatures, mrrespondinp, we believe, to free electron and "bubble" states.