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- W2022792957 abstract "An investigation was made of the feasibility of detecting extremely low Pb concentrations by laser-excited atomic fluorescence. Lead was selected as an example of a three-level atomic system with an intermediate metastable level. Accumulation of atoms in the metastable level resulted in a sharp decrease in the number of fluorescence photons emitted by a single atom in a strong resonance field compared with that found in twolevel atomic systems such as Na. As a result, the threshold for observation of extremely low concentrations of atomic vapor increased substantially. Lead atoms were excited by the second harmonic of a pulsed dye laser at a wavelength of 283.3 nm and fluorescence was recorded at 405.8 nm. A detection limit in accordance with the 3σ criterion of 250 atoms/cm3 or 30 atoms per analytical volume was achieved. Possible methods of improving the sensitivity are discussed." @default.
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- W2022792957 date "1980-08-31" @default.
- W2022792957 modified "2023-09-25" @default.
- W2022792957 title "Detection of low lead concentrations by laser-excited atomic fluorescence" @default.
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- W2022792957 doi "https://doi.org/10.1070/qe1980v010n08abeh010559" @default.
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