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The depth of information is defined as the distance below the surface of a specimen from which information is contributed at a specific resolution. A simplified model of photoemission is used to explore the relationship between electron escape depths and depth of information in photoelectron microscopy (PEM or photoemission electron microscopy). The depth(More)
The absolute photoelectron quantum yield spectra for benzo[a]pyrene and dimethylbenzanthracene are presented in the wavelength range 180--230 nm. These polycyclic aromatic carcinogens have photoelectron quantum yields of approximately 2 x 10(-3) electrons per incident photon at 180 nm. The quantum yields fall off quickly and monotonically at wavelengths(More)
Photoelectric properties of the dyes fluorescein and rhodamine were determined with the aim of assessing the usefulness of these compounds as labels in photoelectron microscopy. The photoelectron quantum yields were measured over the wavelength range 180-230 nm. At 230 nm the quantum yields for fluorescein disodium salt, rhodamine B free base and rhodamine(More)
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