| title: | Selective detection of different types of radiation using intrinsic and impurity emissions in metal oxygen compounds |
|---|---|
| reg no: | ETF5027 |
| project type: | Estonian Science Foundation research grant |
| subject: |
1.3. Physics |
| status: | completed |
| institution: | Institute of Physics at University of Tartu |
| head of project: | Tiit Kärner |
| duration: | 01.01.2002 - 31.12.2004 |
| description: | The aim of the project is a search and detailed study of the new metal-oxides based radiation-resistant materials with the following simultaneous efficient impurity and intrinsic luminescence: interband recombination luminescence (RL), intraband luminescence (IBL) and crossluminescence (CL), the efficiencies of which differ in their dependence on the excitation density. Coexistence of the several above-mentioned emissions in a crystal allows to separate and interprete the main characteristic energy bands in the electronic structure of these materials and enables a selective detection and dosimetry of the high energy particles, responsible for the creation of Frenkel defects (FD) in the anion sublattice and (or) high density of electron-hole pairs. Monitoring the thermal decay of the FD by an accompanying thermostimulated luminescence or the concentration of FD by their photostimulated luminescence opens a parallel possibility for a selective detection and dosimetry of the high energy particles. Therefore, the search and investigation by means of EPR and the methods of thermoactivation spectroscopy of the properties of the centers of localization of the oxygen interstitials and vacancies, created by high energy particles and elaboration of the methods most suitable for their detection, is a second main task of the project. It includes the search and growth of the crystals with the centers of effective recombination luminescence suitable for the thermoluminescent detection of the thermal destruction of the interstitial centers. |
| project group | ||||
|---|---|---|---|---|
| no | name | institution | position | |
| 1. | Sergei Dolgov | IPUT | Scientist | |
| 2. | Irina Kudrjavtseva | IPUT | Scientist | |
| 3. | Tiit Kärner | Institute of Physics, University of Tartu | Sen.Res.Associate | |
| 4. | Tšeslav Luštšik | IPUT | Sen.Scientist on grant basis | |
| 5. | Aarne Maaroos | IPUT | Sen.Scientist. | |
| 6. | Fjodor Savihhin | IPUT | Sen.Scientist | |