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  • 1
    Electronic Resource
    Electronic Resource
    The effect of a thin silver layer on the critical current of epitaxial YBCO films
    Amsterdam : Elsevier
    Physica C: Superconductivity and its applications 197 (1992), S. 1-8 
    Details
    ISSN: 0921-4534
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0921-4534(92)90225-2
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  • 2
    Electronic Resource
    Electronic Resource
    Flux focusing in all high-T"c Josephson edge junctions and SQUIDs
    Amsterdam : Elsevier
    Physica C: Superconductivity and its applications 202 (1992), S. 263-267 
    Details
    ISSN: 0921-4534
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0921-4534(92)90169-D
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  • 3
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    The Virgo O3 run and the impact of the environment (2022)
    IOP
    Details
    Publication Date: 2024-05-03
    Description: Sources of geophysical noise (such as wind, sea waves and earthquakes) or of anthropogenic noise impact ground-based gravitational-wave interferometric detectors, causing transient sensitivity worsening and gaps in data taking. During the one year-long third observing run (O3: from April 01, 2019 to March 27, 2020), the Virgo Collaboration collected a statistically significant dataset, used in this article to study the response of the detector to a variety of environmental conditions. We correlated environmental parameters to global detector performance, such as observation range, duty cycle and control losses. Where possible, we identified weaknesses in the detector that will be used to elaborate strategies in order to improve Virgo robustness against external disturbances for the next data taking period, O4, currently planned to start at the end of 2022. The lessons learned could also provide useful insights for the design of the next generation of ground-based interferometers.
    Description: Published
    Description: 235009
    Description: 5T. Sismologia, geofisica e geologia per l'ingegneria sismica
    Description: JCR Journal
    Keywords: Gravitational waves ; ambient noise ; 04.06. Seismology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 4
    Electronic Resource
    Electronic Resource
    The .pi. nucleophilicity: the effect of charge delocalization on the efficiency of internal displacements in ElcB reactions (1985)
    s.l. : American Chemical Society
    The @journal of organic chemistry 50 (1985), S. 832-836 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00206a022
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  • 5
    Electronic Resource
    Electronic Resource
    Pulse radiolysis studies of uranium(VI), neptunium(VI), neptunium(V), and plutonium(VI) in aqueous perchlorate media (1976)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 80 (1976), S. 1684-1686 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100556a006
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  • 6
    Electronic Resource
    Electronic Resource
    Excited electronic states of ethylene sulfide. Circular dichroism study of (+)-(R,R)-2,3-dimethylthiirane (1983)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 87 (1983), S. 4585-4588 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100246a010
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  • 7
    Electronic Resource
    Electronic Resource
    Composition of porous silicon (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 2321-2325 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Samples of porous Si were prepared from p-type, 10 Ω cm Si under 10 mA cm−2 anodization in aqueous HF (mostly 50%) for 5 min. These showed photoluminescence peaking at 835 nm at 10 K, with full width half maximum of 78 nm, the data showing little change up to 150 K. High-resolution scanning electron microscopy showed column widths of 2–6 nm in the 2-μm-thick films. Hydrogen content was measured by the method of elastic recoil detection, and carbon and oxygen by nuclear reaction analysis. The fluorine content was measured by particle-induced gamma emission as 0.03 at. %. The Si, O, C, and H contents were confirmed by Rutherford backscattering analysis, as approximately Si2.5O1.2C1.3H1.2. The data, particularly the low Si content, are not inconsistent with the presence of complex chemical compounds in the films, although any role they play is not established.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.353136
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  • 8
    Electronic Resource
    Electronic Resource
    Compaction, distribution, and chemical bonding of tungsten-implanted glassy carbon (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 72 (1992), S. 5687-5694 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The composition, distribution, and chemical bonding of tungsten-implanted glassy carbon have been studied for ion doses between 3.5×1014 and 1.5×1017 ions/cm2. The implantations were performed using a metal-vapor vacuum arc ion source which for an extraction potential of 20 kV yields a mean implant energy of 60 keV. The implanted layer was examined by Rutherford backscattering spectrometry and Auger profiling spectroscopy. In addition, volume effects were assessed by measuring the step height between implanted and unimplanted regions. It has been established that the implanted tungsten is bonded in a carbidic configuration. This is in agreement with thermodynamic data which favors carbide formation rather than separate phases of metallic tungsten and graphitic carbon. For the highest dose studied, 1.5×1017 ions/cm2, the tungsten distribution was found to be nearly constant near the surface followed by a decrease at larger depths. For ion doses up to 3.6×1016 ions/cm2, the maximum tungsten distribution was found to occur at a depth 300±100 A(ring) and the implanted and retained doses were found to be equal. For tungsten ion doses between 7.35×1014 and 1×1016 ions/cm2, the implanted region was found to be compacted by 300±100 A(ring). The latter is attributed to an irradiation-induced densification of glassy carbon from 1.5 to 2.1 g/cm3. This compaction effect is also found to occur upon C+ (30 keV) implantation for ion doses between 3×1016 and 1.3×1017 ions/cm2. In this case the implanted layer was compacted by 400±100 A(ring). For higher tungsten doses, a steep increase in compaction of the tungsten implanted layer was observed. This is attributed to chemical and sputtering effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.351919
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  • 9
    Electronic Resource
    Electronic Resource
    A theoretical study of the surface diffusion of large molecules. I. n-alkane-type chains on W(100) (1992)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 97 (1992), S. 1531-1541 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: In the present study the surface diffusion of model n-alkane-type chains adsorbed on a W(100) surface were simulated. The simulations were performed using molecular dynamics calculations where the thermal motion of the surface atoms was introduced via the generalized Langevin method. The potential function among the chain atoms used in these calculations described the nearest-neighbor interaction by a Morse potential while next-nearest-neighbors and next-next-nearest-neighbors interaction was described by a Lennard-Jones 12-6 and a repulsive exponential function, respectively. The length of the chains, N, considered were N=3, 6, 10, and 20. For each value of N the chain diffusion at three or four surface temperatures was examined. For all values of N it was found that the diffusion coefficient could be described by an Arrhenius expression. It was found, in good agreement with the experimental results, that the activation energy for the diffusional motion scales with the chain length while the preexponential factors were practically independent of N. In addition, various static (e.g., average mean square end-to-end distance and average mean square radius of gyration) and dynamic (e.g., autocorrelation functions) properties of the simulated systems were computed. The results of these simulations were used to obtain a qualitative understanding of the mechanism by which such chains diffuse on a solid surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.463229
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  • 10
    Electronic Resource
    Electronic Resource
    Radiation science using Z-pinch x rays : Review,Tutorial and Invited Papers from the 43rd Annual Meeting of the APS Division of Plasma Physics (2002)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 9 (2002), S. 2186-2194 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Present-day Z-pinch experiments generate 200 TW peak power, 5–10 ns duration x-ray bursts that provide new possibilities to advance radiation science. The experiments support both the underlying atomic and plasma physics, as well as inertial confinement fusion and astrophysics applications. A typical configuration consists of a sample located 1–10 cm away from the pinch, where it is heated to 10–100 eV temperatures by the pinch radiation. The spectrally-resolved sample-plasma absorption is measured by aiming x-ray spectrographs through the sample at the pinch. The pinch plasma thus both heats the sample and serves as a backlighter. Opacity measurements with this source are promising because of the large sample size, the relatively long radiation duration, and the possibility to measure opacities at temperatures above 100 eV. Initial opacity experiments are under way with CH-tamped NaBr foil samples. The Na serves as a thermometer and absorption spectra are recorded to determine the opacity of Br with a partially-filled M-shell. The large sample size and brightness of the Z pinch as a backlighter are also exploited in a novel method measuring re-emission from radiation-heated gold plasmas. The method uses a CH-tamped layered foil with Al+MgF2 facing the radiation source. A gold backing layer that covers a portion of the foil absorbs radiation from the source and provides re-emission that further heats the Al+MgF2. The Al and Mg heating is measured using space-resolved Kα absorption spectroscopy and the difference between the two regions enables a determination of the gold re-emission. Measurements are also performed at lower densities where photoionization is expected to dominate over collisions. Absorption spectra have been obtained for both Ne-like Fe and He-like Ne, confirming production of the relevant charge states needed to benchmark atomic kinetics models. Refinement of the methods described here is in progress to address multiple issues for radiation science. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1459454
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