Determination of triplet state spin-lattice relaxation rates by a pulsed excitation method: anthraquinone in shpolskii matrices

✍ Scribed by R. Avarmaa; A. Suisalu

• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 523 KB
• Volume: 52
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(77)80511-3

✦ Synopsis

Spin-lattice relaxation rates in the Tt triplet state of 9,lOanthraquinone dissolved in n-heptane and isooctane are measured in the temperature region 1.9 to 30 K using an excitation of phosphorescence by short flashes. The relaxation rates are determined from the tri-evponential decay curves measured with ;15 ~.rs resolution. The relaxation is found to be dnisotropic and the dominating rate to connect the two most short-lived sublevels. The tempcraturedepcndence of the relaxation rates is close to a T3 hw.