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The S1 and T1 spectra of chlorophyll-a in the visible region and an S1-bypassing relaxation from two-photon stepwise excited states

✍ Scribed by D. Leupold; H. Stiel; J. Sepiol

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 380 KB
Volume: 132
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(86)80095-1

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✦ Synopsis

Differential optical density spectra of excited chlorophyll-a (chl-a) in dioxane were measured between 475 and 630 nm by a 337 nm excite-and-probe beam method with variable delay. Determination of the quantitative S, and T, absorption cross sections u(A) is based on additional measurements at 670 nm, where oS is known from non-linear absowtion. The population density analysis reveals an S,-bypassing relaxation of chl-a afte? two-step absorption of 337 nm photons.

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