| Автор | A G I Dalvi |
| Автор | M D Sastry |
| Автор | B D Joshi |
| Дата выпуска | 1984-11-20 |
| dc.description | Trap level spectroscopic investigations have been carried out on LiF doped (separately) with uranium and americium using EPR, TSL and TSL-spectral techniques. These studies, apart from obtaining trap parameters-trap depths and frequency factors-helped in elucidating the processes that occur in electron and hole trapping and their subsequent recombination on thermal stimulation. In the uranium-doped sample the electron trapping by U<sup>6+</sup> complexes (UO<sub>6-</sub>)<sup>6-</sup> and (UO<sub>5</sub>F)<sup>5-</sup> at (LiF<sub>6-</sub>)<sup>5-</sup> sites and subsequent electron-hole recombination at U<sup>6+</sup> has been identified as the predominant mode of TSL. In <sup>241</sup>Am-doped sample americium has been found to be stabilised in the divalent state. Whereas in the high-temperature region F-centre production and Am<sup>2+</sup> to or from Am<sup>3+</sup> were found to be the dominant modes of electron and hole trapping, respectively, in the region below room temperature Am<sup>2+</sup> to or from Am<sup>+</sup> and production of U<sub>3</sub> centres (hydrogen atoms at F<sup>-</sup> sites) were found to be the dominant modes of electron and hole trapping, respectively. In both high-temperature and sub-room-temperature regions electron-hole recombination results in the creation of electronically excited Am<sup>2+</sup> resulting in the luminescence of Am<sup>2+</sup> on thermal stimulation. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Trap level spectroscopy of actinide-doped phosphors. I. LiF:UO<sub>2</sub><sup>2+</sup> and LiF:<sup>241</sup>Am |
| Тип | paper |
| DOI | 10.1088/0022-3719/17/32/018 |
| Print ISSN | 0022-3719 |
| Журнал | Journal of Physics C: Solid State Physics |
| Том | 17 |
| Первая страница | 5851 |
| Последняя страница | 5863 |
| Аффилиация | A G I Dalvi; Radiochem. Div., Bhabha Atomic Res. Centre, Bombay, India |
| Аффилиация | M D Sastry; Radiochem. Div., Bhabha Atomic Res. Centre, Bombay, India |
| Аффилиация | B D Joshi; Radiochem. Div., Bhabha Atomic Res. Centre, Bombay, India |
| Выпуск | 32 |
