14 research outputs found
A Measurement of the First Moment of the Range Distribution of ( n,2n ) Recoils in Au and Nb
No full textSputtering Yields of Au by 14_MeV Neutrons and Emission of Recoils from n, 2n Reactions in Au and Nb
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High-speed thermal neutron tomography for the visualization ofwater repellents, consolidants and water uptake in sand and lime stone
A molecular overlayer with the Fibonacci square grid structure
No full textQuasicrystals differ from conventional crystals and amorphous materials in that they possess long-range order without periodicity. They exhibit orders of rotational symmetry which are forbidden in periodic crystals, such as five-, ten-, and twelve-fold, and their structures can be described with complex aperiodic tilings such as Penrose tilings and Stampfli–Gaehler tilings. Previous theoretical work explored the structure and properties of a hypothetical four-fold symmetric quasicrystal—the so-called Fibonacci square grid. Here, we show an experimental realisation of the Fibonacci square grid structure in a molecular overlayer. Scanning tunnelling microscopy reveals that fullerenes (C60) deposited on the two-fold surface of an icosahedral Al–Pd–Mn quasicrystal selectively adsorb atop Mn atoms, forming a Fibonacci square grid. The site-specific adsorption behaviour offers the potential to generate relatively simple quasicrystalline overlayer structures with tunable physical properties and demonstrates the use of molecules as a surface chemical probe to identify atomic species on similar metallic alloy surfaces
Entwicklungen und Forschungsarbeiten mit kalten und ultrakalten Neutronen Schlussbericht
No full textAvailable from TIB Hannover: DtF QN1(54,36) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman
Systematic investigations of endogenous cortisol and cortisone in nails by LC-MS/MS and correlation to hair
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