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| Material Type: | Biography, Thesis/dissertation, Manuscript |
|---|---|
| Document Type: | Book, Archival Material |
| All Authors / Contributors: |
Benjamin Willard Smith |
| OCLC Number: | 3349504 |
| Notes: | Typescript. Vita. |
| Description: | v, 64 leaves : ill. ; 28 cm. |
| Responsibility: | by Benjamin W. Smith. |
Abstract:
The tunable continuous wave (cw) dye laser has been shown to be capable of producing saturation conditions for sodium i.v. an air - acetylene flame. The experimental evidence indicates that the sodium, doublet is a reasonably good approximation of a two-level system. Saturation of the sodium. 589.6 mm line was observed at laser spectral irradiances of 10^13 erg s^-1 c^-2 mm^-1 and greater. Measurements of the absolute maximum fluorescence radiance under saturation conditions have been used to measure sodium concentration profiles in air - hydrogen and air - acetylene flames with spatial resolution on the order of 0.01 cm. The cw dye laser has also been used as an atomic fluorescence excitation source for avialytical purposes and, using resonance fluorescence, limits of detection of 0.0001 ug ml^-1 and 0.04 ug ml^-1 have been obtained for sodium and barium, respectively. Using nonresonance fluorescence with excited state transi.tions , limits of detection of between 0.3 iig m and 100 yg ml were obtained for Cu, Li, Mo, Nd, Rh, Sc , V, and Sr . All transitions were between 550 and 620 nra using rhodamine 6G and sodium fluorescein as laser dyes.
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