Measurements of Defect Structures by Positron Annihilation Lifetime Spectroscopy of the Tellurite Glass 70TeO2-5XO-10P2O5-10ZnO-5PbF2 (X = Mg, Bi2, Ti) Doped with Ions of the Rare Earth Element Er3+
| Autor: | El Sayed Yousef, V. Boyko, Jacek Filipecki, Edmund Golis, Katarzyna Pach |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Astrophysics::High Energy Astrophysical Phenomena Positron Annihilation Lifetime Spectroscopy Nanochemistry 02 engineering and technology 010402 general chemistry 01 natural sciences Ion Volume Defect Positron lcsh:TA401-492 General Materials Science Spectroscopy Range (particle radiation) TeO2 Positron Lifetime Spectroscopy Doping Positron Lifetime 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Physics::Accelerator Physics Tellurite Glass Nanometre High Energy Physics::Experiment lcsh:Materials of engineering and construction. Mechanics of materials Atomic physics 0210 nano-technology |
| Zdroj: | Nanoscale Research Letters, Vol 12, Iss 1, Pp 1-4 (2017) |
| ISSN: | 1931-7573 |
| DOI: | 10.1186/s11671-017-2075-z |
| Popis: | The objective of the study was the structural analysis of the 70TeO2-5XO-10P2O5-10ZnO-5PbF2 (X = Mg, Bi2, Ti) tellurite glasses doped with ions of the rare-earth elements Er3+, based on the PALS (positron annihilation lifetime spectroscopy) method of measuring positron lifetimes. Values of positron lifetimes and the corresponding intensities may be connected with the sizes and number of structural defects, the sizes of which range from a few angstroms to a few dozen nanometers. Experimental positron lifetime spectrum revealed existence of two positron lifetime components τ 1 andτ 2. Their interpretation was based on two-state positron trapping model where the physical parameters are the positron annihilation rate and positron trapping rate. |
| Databáze: | OpenAIRE |
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