Photon-echo relaxation measurements with two dye-lasers application to pentacene-h14 and -d14 in p-terphenyl-h crystals at 1.5 K
✍ Scribed by Jos B.W. Morsink; Thijs J. Aartsma; Douwe A. Wiersma
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 420 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
Electronically controlled photonecho relaxation measurcments, using two nitrogcn pumped dye-lasers, are reported for mlsed crystals of pëntaccne-/zla and -dl4 in p-terphenyl-hm at 1.5 K. In dflute mixed crystals (ca. 10-* M) the photonecho lifetime is found to bc exclusively dctermined by the fluorescente lifctime. Homogeneous linewidths of 7.1 and 5.5 MHz at 1.5 K are then c~lculated for the electronic origin of the IBZU c 'A, tively. The decresse in photonecho lifctime at higher guest concentrations ca. 10 cg transition of pentacene-hl4 and -dl4 respec--7 hl) is ascribed to energv transfer betwecn excited and neutral guest molecules.