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Displaying records 31 to 40 of 273 records.
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31. Classical over-the-barrier model for neutralization of highly charged ions above thin dielectric films
Topic: Physics
Published: 6/3/2013
Authors: Joshua M Pomeroy, Russell Lake, C E Sosolik
Abstract: We apply the classical over-the-barrier model (COB) to charge transfer between highly charged ions (HCIs)and targets consisting of thin dielectric films on metals. Distances for the onset of classically allowed above surface electron capture are ...

32. Code-division SQUID multiplexing
Topic: Physics
Published: 4/23/2010
Authors: Michael D. Niemack, Kent D Irwin, Joern Beyer, Hsiao-Mei Cho, William B Doriese, Gene C Hilton, Carl D Reintsema, Daniel R Schmidt, Joel Nathan Ullom, Leila R Vale
Abstract: Multiplexed superconducting quantum interference device (SQUID) readout systems are a critical technology for measuring large arrays of superconducting transition-edge sensor (TES) detectors. Current successful SQUID multiplexing architectures are mo ...

33. Conflicting Observations Resolved by a Far IR and UV/Vis Study of the NO^d3^ Radical
Topic: Physics
Published: 5/4/2009
Authors: Helmut Beckers, Helge Willner, Marilyn E Jacox
Abstract: By codeposition of NO/Ne and O2/Ne mixtures at 6 K, weakly bound complexes between O2 and NO are formed. They exhibit a strong, structured charge transfer UV band at lambda(max) = 275 nm. The UV band disappears during UV irradiation of the neon mat ...

34. Confronting the Complexity of Commercial Carbon Nanotube Materials
Topic: Physics
Published: 5/13/2015
Authors: Luis Fernando Vargas Lara, Jack F Douglas
Abstract: The morphology of commercially available carbon nanotube materials is often much more complex than the term ,carbon nanotubeŠ (CNT) would imply. Commercial CNT materials are typically composed of roughly spherical CNT domains having a highly rami ...

35. Controlling the Competition between Optically Induced Ultrafast Spin-Flip Scattering and Spin Transport in Magnetic Multilayers
Topic: Physics
Published: 5/7/2013
Authors: Justin M Shaw, Hans Toya Nembach, Thomas J Silva, Margaret M. Murnane, Henry C. Kapteyn, Martin Aeschlimann, Claus M. Schneider, Emrah Turgut, Stefan Mathias, Patrik Grychtol, Chan La-O-Vorakiat, Dennis Rudolf, Roman Adam
Abstract: The study of ultrafast dynamics in magnetic materials provides rich opportunities for greater fundamental understanding of correlated phenomena in solid-state matter, because many of the basic microscopic mechanisms involved are as-yet unclear and ar ...

36. Controlling the electronic structure of graphene using surface-adsorbate interactions
Topic: Physics
Published: 7/21/2015
Authors: Piotr Matyba, Adra V. Carr, Cong Chen, David L. Miller, Thomas Orlando, Stefan Mathias, Mark W Keller, Henry C. Kapteyn, Margaret M. Murnane
Abstract: Hybridization of atomic orbitals in graphene on Ni(111) opens up a large energy gap of ≈2.8 eV between nonhybridized states at the K point. Here we use alkali-metal adsorbate to reduce and even eliminate this energy gap, and also identify a new ...

37. Coupled quantized mechanical oscillators
Topic: Physics
Published: 3/10/2011
Authors: Kenton R. Brown, Christian Ospelkaus, Yves Colombe, Andrew C Wilson, Dietrich G Leibfried, David J Wineland
Abstract: The harmonic oscillator is one of the simplest physical systems but also one of the most fundamental. It is ubiquitous in nature, often serving as an approximation for a more complicated system or as a building block for larger models. Realizations o ...

38. Critically Evaluated Energy Levels and Spectral Lines of Singly Ionized Indium (In II)
Series: Journal of Research (NIST JRES)
Report Number: 118.004
Topic: Physics
Published: 1/14/2013
Author: Alexander Kramida
Abstract: A comprehensive list of the best measured wavelengths in the In II spectrum has been compiled. Uncertainties of the wavelength measurements have been analyzed, and existing inconsistencies have been resolved. An optimized set of fine-structure en ...

39. Cross-validation of microfabricated atomic magnetometers with SQUIDs for biomagnetic applications
Topic: Physics
Published: 9/28/2010
Authors: Svenja A Knappe, Tillman H. Sander, Olaf Kosch, Frank Wiekhorst, John E Kitching, Lutz Trahms
Abstract: A chip-scale atomic magnetometer (CSAM) is compared with a superconducting quantum interference devices (SQUID) sensor in two biomedical applications. CSAMs are magnetic field sensors that operate at room temperature and are based on spectroscopy of ...

40. Cryogenic Design and Performance of an Apparatus for Magnetically Trapping Ultracold Neutrons
Topic: Physics
Published: 10/5/2014
Author: Hans P Mumm
Abstract: The cryogenic design and performance of an apparatus used to magnetically confine ultracold neutrons (UCN) is presented. The apparatus is part of an effort to measure the beta-decay lifetime of the free neutron and is comprised of a high-current su ...

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