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Now showing items 44-63 of 122

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    Feasibility of an optical fiber clock 

    Ilinova, Ekaterina; Babb, James F.; Derevianko, Andrei (2017)
    We explore the feasibility of a fiber clock, i.e., a compact, high-precision, optical lattice atomic clock based on atoms trapped inside a hollow-core optical fiber. Such a setup offers an intriguing potential both for a ...
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    Forbidden M1 and E2 transitions in monovalent atoms and ions 

    Safronova, U. I.; Safronova, M. S.; Johnson, W. R. (2017)
    We carried out a systematic high-precision relativistic study of the forbidden magnetic dipole and electric quadrupole transitions in Ca+, Rb, Sr+, Cs, Ba+, Fr, Ra+, Ac2+, and Th3+. This work is motivated by the importance ...
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    Geometry and kinematics of the Grant Range brittle detachment system, eastern Nevada, USA: An end-member style of upper crustal extension 

    Long, Sean P.; Walker, Jerome P. (2015)
    Documenting the range of styles of normal faulting is fundamental to understanding crustal extension. Here geologic mapping, field relationships, and deformed and restored cross sections illustrate the geometry and kinematic ...
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    GIA Model Statistics for GRACE Hydrology, Cryosphere, and Ocean Science 

    Caron, L.; Ivins, E. R.; Larour, E.; Adhikari, S.; Nilsson, J.; Blewitt, G. (2018)
    We provide a new analysis of glacial isostatic adjustment (GIA) with the goal of assembling the model uncertainty statistics required for rigorously extracting trends in surface mass from the Gravity Recovery and Climate ...
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    Growth of ice particle mass and projected area during riming 

    Erfani, Ehsan; Mitchell, David L. (2017)
    There is a long-standing challenge in cloud and climate models to simulate the process of ice particle riming realistically, partly due to the unrealistic parameterization of the growth of ice particle mass (m) and projected ...
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    High-contrast laser acceleration of relativistic electrons in solid cone-wire targets 

    Higginson, D. P.; Link, A.; Sawada, H.; Wilks, S. C.; Bartal, T.; Chawla, S.; Chen, C. D.; Flippo, K. A.; Jarrott, L. C.; Key, M. H.; McLean, H. S.; Patel, P. K.; Perez, F.; Wei, M. S.; Beg, F. N. (2015)
    The consequences of small scale-length precursor plasmas on high-intensity laser-driven relativistic electrons are studied via experiments and simulations. Longer scale-length plasmas are shown to dramatically increase the ...
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    Hyperfine-induced quadrupole moments of alkali-metal-atom ground states and their implications for atomic clocks 

    Derevianko, Andrei (2016)
    Spherically symmetric ground states of alkali-metal atoms do not posses electric quadrupole moments. However, the hyperfine interaction between nuclear moments and atomic electrons distorts the spherical symmetry of ...
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    Imaging the He-2 quantum halo state using a free electron laser 

    Zeller, Stefan; Kunitski, Maksim; Voigtsberger, Joerg; Kalinin, Anton; Schottelius, Alexander; Schober, Carl; Waitz, Markus; Sann, Hendrik; Hartung, Alexander; Bauer, Tobias; Pitzer, Martin; Trinter, Florian; Goihl, Christoph; Janke, Christian; Richter, Martin; Kastirke, Gregor; Weller, Miriam; Czasch, Achim; Kitzler, Markus; Braune, Markus; Grisenti, Robert E.; Schoellkopf, Wieland; Schmidt, Lothar Ph H.; Schoefflera, Markus S.; Williams, Joshua B.; Jahnke, Till; Doerner, Reinhard (2016)
    Quantum tunneling is a ubiquitous phenomenon in nature and crucial for many technological applications. It allows quantum particles to reach regions in space which are energetically not accessible according to classical ...
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    Imaging the square of the correlated two-electron wave function of a hydrogen molecule 

    Waitz, M.; Bello, R. Y.; Metz, D.; Lower, J.; Trinter, F.; Schober, C.; Keiling, M.; Lenz, U.; Pitzer, M.; Mertens, K.; Martins, M.; Viefhaus, J.; Klumpp, S.; Weber, T.; Schmidt, L. Ph H.; Williams, J. B.; Schoeffler, M. S.; Serov, V. V.; Kheifets, A. S.; Argenti, L.; Palacios, A.; Martin, F.; Jahnke, Till; Doerner, Reinhard (2017)
    The toolbox for imaging molecules is well-equipped today. Some techniques visualize the geometrical structure, others the electron density or electron orbitals. Molecules are many-body systems for which the correlation ...
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    Imaging the square of the correlated two-electron wave function of a hydrogen molecule (vol 8, 2018) 

    Waitz, M.; Bello, R. Y.; Metz, D.; Lower, J.; Trinter, F.; Schober, C.; Keiling, M.; Lenz, U.; Pitzer, M.; Mertens, K.; Martins, M.; Viefhaus, J.; Klumpp, S.; Weber, T.; Schmidt, L. Ph H.; Williams, J. B.; Schoeffler, M. S.; Serov, V. V.; Kheifets, A. S.; Argenti, L.; Palacios, A.; Martin, F.; Jahnke, Till; Doerner, Reinhard (2018)
    The toolbox for imaging molecules is well-equipped today. Some techniques visualize the geometrical structure, others the electron density or electron orbitals. Molecules are many-body systems for which the correlation ...
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    Implementation of a Faraday rotation diagnostic at the OMEGA laser facility 

    Rigby, A.; Katz, J.; Bott, A. F. A.; White, T. G.; Tzeferacos, P.; Lamb, D. Q.; Froula, D. H.; Gregori, G. (2018)
    Magnetic field measurements in turbulent plasmas are often difficult to perform. Here we show that for > kG magnetic fields, a time-resolved Faraday rotation measurement can be made at the OMEGA laser facility. This ...
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    Implementation of a Faraday rotation diagnostic at the OMEGA laser facility 

    Rigby, A.; Katz, J.; Bott, A. F. A.; White, T. G.; Tzeferacos, P.; Lamb, D. Q.; Froula, D. H.; Gregori, G. (2018)
    Magnetic field measurements in turbulent plasmas are often difficult to perform. Here we show that for > kG magnetic fields, a time-resolved Faraday rotation measurement can be made at the OMEGA laser facility. This ...
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    Influence of Xe and Kr impurities on x-ray yield from debris-free plasma x-ray sources with an Ar supersonic gas jet irradiated by femtosecond near-infrared-wavelength laser pulses 

    Kantsyrev, Victor L.; Schultz, K. A.; Shlyaptseva, V. V.; Petrov, G. M.; Safronova, A. S.; Petkov, E. E.; Moschella, J. J.; Shrestha, I.; Cline, W.; Wiewior, P.; Chalyy, O. (2016)
    Many aspects of physical phenomena occurring when an intense laser pulse with subpicosecond duration and an intensity of 10(18)-10(19)W/cm(2) heats an underdense plasma in a supersonic clustered gas jet are studied to ...
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    Investigation of Acute Pulmonary Deficits Associated with Biomass Fuel Cookstove Emissions in Rural Bangladesh 

    Medgyesi, Danielle N.; Holmes, Heather A.; Angermann, Jeff E. (2017)
    The use of solid biomass fuels in cookstoves has been associated with chronic health impacts that disproportionately affect women worldwide. Solid fuel stoves that use wood, plant matter, and cow dung are commonly used for ...
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    Investigation of wire-array Z-pinches by laser probing diagnostics 

    Ivanov, Vladimir V.; Anderson, Andrew A.; Papp, D. (2019)
    Laser diagnostics provides powerful tools for the investigation of dense Z-pinches. In this paper, wire-array Z-pinches are investigated at the 1 MA Zebra generator using laser diagnostics at different wavelengths coupled ...
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    Ion Dynamics Effect on Stark-Broadened Line Shapes: A Cross-Comparison of Various Models 

    Ferri, Sandrine; Calisti, Annette; Mossé, Caroline; Rosato, Joël; Talin, Bernard; Alexiou, Spiros; Gigosos, Marco A.; González, Manuel A.; González-Herrero, Diego; Lara, Natividad; Gomez, Thomas; Iglesias, Carlos; Lorenzen, Sonja; Mancini, Roberto C.; Stambulchik, Evgeny (7/4/2014)
    Modeling the Stark broadening of spectral lines in plasmas is a complex problem. The problem has a long history, since it plays a crucial role in the interpretation of the observed spectral lines in laboratories and ...
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    Ionization potentials of superheavy elements No, Lr, and Rf and their ions 

    Dzuba, V. A.; Safronova, M. S.; Safronova, U. I.; Kramida, A. (2016)
    We predict ionization potentials of superheavy elements No, Lr, and Rf and their ions using a relativistic hybrid method that combines configuration interaction (CI) with the linearized coupled-cluster approach. Extensive ...
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    Kinetic modeling of x-ray laser-driven solid Al plasmas via particle-in-cell simulation 

    Royle, R.; Sentoku, Y.; Mancini, Roberto C.; Paraschiv, I.; Johzaki, Tomoyuki (2017)
    Solid-density plasmas driven by intense x-ray free-electron laser (XFEL) radiation are seeded by sources of nonthermal photoelectrons and Auger electrons that ionize and heat the target via collisions. Simulation codes ...
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    Laboratory measurements of resistivity in warm dense plasmas relevant to the microphysics of brown dwarfs 

    Booth, N.; Robinson, A. P. L.; Hakel, P.; Clarke, R. J.; Dance, R. J.; Doria, D.; Gizzi, L. A.; Gregori, G.; Koester, P.; Labate, L.; Levato, T.; Li, B.; Makita, M.; Mancini, Roberto C.; Pasley, J.; Rajeev, P. P.; Riley, D.; Wagenaars, E.; Waugh, J. N.; Woolsey, N. C. (2015)
    Since the observation of the first brown dwarf in 1995, numerous studies have led to a better understanding of the structures of these objects. Here we present a method for studying material resistivity in warm dense plasmas ...
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    Levitated optomechanics with a fiber Fabry-Perot interferometer 

    Pontin, A.; Mourounas, L. S.; Geraci, Andrew A.; Barker, Peter F. (2018)
    In recent years, quantum phenomena have been experimentally demonstrated on variety of optomechanical systems ranging from micro-oscillators to photonic crystals. Since single photon couplings are quite small, most ...