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Browsing Physics by Issue Date
Now showing items 1-20 of 123
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Measurements of Light-Absorbing Particles on the Glaciers in the Cordillera Blanca, Peru
(2/12/2015)Glaciers in the tropical Andes have been rapidly losing mass since the 1970s. In addition to the documented increase in temperature, increases in light-absorbing particles deposited on glaciers could be contributing to ... -
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Study of ablation and implosion stages in wire arrays using coupled ultraviolet and X-ray probing diagnostics
(2015)Star and cylindrical wire arrays were studied using laser probing and X-ray radiography at the 1-MA Zebra pulse power generator at the University of Nevada, Reno. The Leopard laser provided backlighting, producing a laser ... -
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Resonant interaction of trapped cold atoms with a magnetic cantilever tip
(2015)Magnetic resonance in an ensemble of laser-cooled trapped Rb atoms is excited using a microcantilever with a magnetic tip. The cantilever is mounted on a multilayer chip designed to capture, cool, and magnetically transport ... -
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Acoustically induced slip in sheared granular layers: Application to dynamic earthquake triggering
(2015)A fundamental mystery in earthquake physics is "how can an earthquake be triggered by distant seismic sources?" Here we use discrete element method simulations of a granular layer, during stick slip, that is subject to ... -
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Spatial-temporal variation of low-frequency earthquake bursts near Parkfield, California
(2015)Tectonic tremor (TT) and low-frequency earthquakes (LFEs) have been found in the deeper crust of various tectonic environments globally in the last decade. The spatial-temporal behaviour of LFEs provides insight into deep ... -
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Effects of molecular resonances on Rydberg blockade
(2015)We study the effect of resonances associated with complex molecular interaction of Rydberg atoms on Rydberg blockade. We show that densely spaced molecular potentials between doubly excited atomic pairs become unavoidably ... -
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Absolute single-photoionization cross sections of Se2+: Experiment and theory
(2015)Absolute single-photoionization cross-section measurements for Se2+ ions were performed at the Advanced Light Source at Lawrence Berkeley National Laboratory using the merged-beams photo-ion technique. Measurements were ... -
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Dielectronic recombination of Zn-likeW(44+) from Cu-likeW(45+)
(2015)Energy levels, radiative transition probabilities, and autoionization rates for [Ar] 3d(10)4l'nl (n = 4- 12, l <= n - 1), [Ar]3d(10)5l'nl (n = 5-8, l <= n - 1), and [Ar]3d(9)4l'4l '' nl (n = 4-5, l <= n - 1) states in Zn- ... -
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Towards a Mg Lattice Clock: Observation of the S-1(0)-P-3(0) Transition and Determination of the Magic Wavelength
(2015)We optically excite the electronic state 3s3p P-3(0) in Mg-24 atoms, laser cooled and trapped in a magic-wavelength lattice. An applied magnetic field enhances the coupling of the light to the otherwise strictly forbidden ... -
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Multilayered polycrystallization in single-crystal YSZ by laser-shock compression
(2015)A single shot of an ultra-intense laser with 0.8 J of energy and a pulse width of 110 fs (peak intensity of 1.15 x 10(17) W cm(-2)) is divided into two beams and the two beams counter-irradiated onto a 0.5 mm-thick single ... -
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Transitions between the 4f-core-excited states in Ir16+, Ir17+, and Ir18+ ions for clock applications
(2015)Iridium ions near 4f - 5s level crossings are the leading candidates for a new type of atomic clocks with a high projected accuracy and a very high sensitivity to the temporal variation of the fine structure constant a. ... -
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High-contrast laser acceleration of relativistic electrons in solid cone-wire targets
(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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Geometry and kinematics of the Grant Range brittle detachment system, eastern Nevada, USA: An end-member style of upper crustal extension
(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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Relativistic configuration interaction plus linearized-coupled-cluster calculations of U2+ energies, g factors, transition rates, and lifetimes
(2015)Excitation energies, term designations, g factors, transition rates, and lifetimes of U2+ are determined using a relativistic configuration interaction (CI) + linearized-coupled-cluster (LCC) approach. The CI-LCC energies ... -
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The concept of transport capacity in geomorphology
(2015)The notion of sediment-transport capacity has been engrained in geomorphological and related literature for over 50 years, although its earliest roots date back explicitly to Gilbert in fluvial geomorphology in the 1870s ... -
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Dynamics and structure of self-generated magnetics fields on solids following high contrast, high intensity laser irradiation
(2015)The dynamics of self-generated magnetic B-fields produced following the interaction of a high contrast, high intensity (I > 1019 W cm−2) laser beam with thin (3 μm thick) solid (Al or Au) targets is investigated experimentally ... -
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Sensing short range forces with a nanosphere matter-wave interferometer
(2015)We describe a method for sensing short range forces using matter-wave interference in dielectric nanospheres. When compared with atom interferometers, the larger mass of the nanosphere results in reduced wave-packet ... -
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An important criterion for reliable multi-monochromatic x-ray imager diagnostics and its impact on the reconstructed images
(2015)Temperature and density asymmetry diagnosis is critical to advance inertial confinement fusion (ICF) science. A multi-monochromatic x-ray imager, MMI, records the spectral signature from an ICF implosion core with time ... -
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Understanding reliability and some limitations of the images and spectra reconstructed from a multi-monochromatic x-ray imager
(2015)Temperature and density asymmetry diagnosis is critical to advance inertial confinement fusion (ICF) science. A multi-monochromatic x-ray imager (MMI) is an attractive diagnostic for this purpose. The MMI records the ... -
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Study of magnetic fields and current in the Z pinch at stagnation
(2015)The structure of magnetic fields in wire-array Z pinches at stagnation was studied using a Faraday rotation diagnostic at the wavelength of 266 nm. The electron plasma density and the Faraday rotation angle in plasma were ...