| Автор | S U Cheema |
| Автор | M J A Smith |
| Дата выпуска | 1971-07-30 |
| dc.description | Europium added to silver chloride under a nonoxidizing atmosphere enters the lattice substitutionally in the divalent state. A single silver ion vacancy is associated with each europium ion in a nearest cation position at 93 K and leads to an electron resonance which shows orthorhombic symmetry. At room temperature most of the vacancies are dissociated and the predominant spectrum arises from Eu<sup>2+</sup> in a field of octahedral symmetry. The temperature variation in the width of lines which constitute the outer fine structure components of the spectrum gives an activation energy of 0.22+or-0.05 eV for the vacancy motion. In heavily doped specimens a single line spectrum is observed from aggregated europium. Eu<sup>2+</sup> is found to sensitize silver chloride in the bulk. At room temperature irradiation with blue light produces a reduction in the number of Eu<sup>2+</sup> ions and an optical absorption peak at 550 nm due to silver colloid, Irradiation with red light bleaches the colloid band and restores the original number of Eu<sup>2+</sup> ions. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Electron spin resonance of europium in silver chloride |
| Тип | paper |
| DOI | 10.1088/0022-3719/4/10/031 |
| Print ISSN | 0022-3719 |
| Журнал | Journal of Physics C: Solid State Physics |
| Том | 4 |
| Первая страница | 1231 |
| Последняя страница | 1241 |
| Аффилиация | S U Cheema; Univ. Warwick, UK |
| Аффилиация | M J A Smith; Univ. Warwick, UK |
| Выпуск | 10 |
