16 research outputs found
Mortality of British Jews at the Turn of the 20th Century in a Comparative Perspective
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Farmers' bulletin (United States. Dept. of Agriculture)
No full textDiscusses the importance of the development and implementation of school lunch programs in both rural and urban schools
Human resource development: motivation and movement
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Immunogold localization of arabinogalactan proteins, unesterified and esterified pectins in pollen grains and pollen tubes ofNicotiana tabacum L.
No full textInteraction of Intense X-Ray Beams with Atoms
No full textGenerally, the probability that a given atom in a material absorbs an X-ray photon in a single X-ray pulse is much less than unity for storage-ring-based X-ray sources, even for third-generation synchrotron radiation sources. This situation has changed dramatically with the arrival of X-ray free-electron lasers: In the micro-focus of an X-ray free-electron laser, saturation of X-ray photoabsorption is routinely achieved. The immediate consequence is that the overall behavior of matter under such extreme conditions is characterized by efficient multiphoton absorption via a sequence of single-photon absorption events combined with inner-shell decay cascades and collisional ionization processes. In this way, unusual, highly excited states of matter are formed. Focusing on free atoms, this article provides a theoretical framework for the description of X-ray–matter interactions. The nature of X-ray multiphoton physics is explained, and the theory is compared with experimental data on atoms
