Time resolved emission from intermediate strong coupling states in quinoxaline vapor
✍ Scribed by J.R. McDonald; L.E. Brus
- Publisher
- Elsevier Science
- Year
- 1973
- Tongue
- English
- Weight
- 508 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
A frequency doubled, pulsed dye loser is used to excite electronic emission in quinoxaline vapor. The SI ' CT*-n) vibrationless stute (excited in the region of 3693 A) has a collision free lifetime of 6 50 nscc; statisrinl limit inrcrsysrem crossing occurs. A distinct two component "tluorescencc", with collision frcs lifetimes as long as -40 pscc, follows excitation in the S 2 '(T-P-) region (2800-3200 A). An intermediate strong coupling model, with cxtensivc Sz-SI mixing and weaker singlet-lriplet coupling, is proposed 10 explain cxpcrimcntal observations. The fast "tluoresccnce" component is interpreted in terms of a sequential deny theory of Tnmer et al.