Porosity and crystallization of water ice films studied by positron and positronium annihilation
| Autor: | Paul G. Coleman, J Jiang, Yichu Wu, Alexis Kallis, S J Wang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Annihilation
Materials science Annealing (metallurgy) Condensed Matter Physics Electronic Optical and Magnetic Materials Amorphous solid Positron annihilation spectroscopy law.invention Positronium Condensed Matter::Materials Science Positron Chemical physics law Crystallization Atomic physics Porosity |
| Zdroj: | Wu, Y C, Jiang, J, Wang, S J, Kallis, A & Coleman, P G 2011, ' Porosity and crystallization of water ice films studied by positron and positronium annihilation ', Physical Review B, vol. 84, no. 6, 064123 . https://doi.org/10.1103/PhysRevB.84.064123 |
| DOI: | 10.1103/PhysRevB.84.064123 |
| Popis: | The growth, evolution, and annealing of closed and interconnected pores in amorphous and crystalline films of water ice grown under a range of conditions have been studied by variable-energy positron annihilation spectroscopy (VEPAS). By measuring positron and positronium-related annihilation parameters as a function of time and film temperature it is shown that VEPAS has the capacity to yield a wealth of depth-dependent information on film morphology, with particularly promising results on the evolution and annealing of subnanometer closed pores---inaccessible to other techniques---and the study of the energetics of structural and phase changes. |
| Databáze: | OpenAIRE |
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