| Автор | J B Birks |
| Автор | W A Little |
| Дата выпуска | 1953-10-01 |
| dc.description | A method for measuring photo-fluorescence decay times to approximately 10<sup>-9</sup> sec is described. Observations are made of the phase and modulation of the light from a 7.5 Mc/s air discharge tube, and of the fluorescence excited by this light, using a photomultiplier modulated at 15 Mc/s. The decay times of anthracene, stilbene, terphenyl and diphenylacetylene crystals of various thicknesses have been measured. Due to the overlap of the emission and absorption spectra, the technical decay time t<sub>f</sub> of a thick crystal is greater than the molecular decay time (t<sub>f</sub>)<sub>0</sub> observed for a microcrystalline specimen. For anthracene t<sub>f</sub>=14±2 mμsec and (t<sub>f</sub>)<sub>0</sub>=3.5±1.0 mμsec. This value of t<sub>f</sub> agrees with that derived from (t<sub>f</sub>)<sub>0</sub> and the comparative technical and molecular emission spectra. For each of the compounds studied the molecular decay time (t<sub>f</sub>)<sub>00</sub>, in the absence of internal quenching, is of the order of 3-4 mμsec. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Photo-Fluorescence Decay Times of Organic Phosphors |
| Тип | paper |
| DOI | 10.1088/0370-1298/66/10/310 |
| Print ISSN | 0370-1298 |
| Журнал | Proceedings of the Physical Society. Section A |
| Том | 66 |
| Первая страница | 921 |
| Последняя страница | 928 |
| Аффилиация | J B Birks; Physics Department, Rhodes University, Grahamstown, South Africa |
| Аффилиация | W A Little; Physics Department, Rhodes University, Grahamstown, South Africa |
| Выпуск | 10 |
