Showing 41 - 60 results of 3,780 for search '"helium"', query time: 0.26s Refine Results
  1. 41

    Hydrogen and helium trapping in hcp beryllium by Nikolai Zimber, Judith Lammer, Pavel Vladimirov, Gerald Kothleitner, Vicki J. Keast, Michael Dürrschnabel, Michael Klimenkov

    Published 2023-04-01
    “…In the present paper we use analytical spectroscopy in TEM to show that hydrogen adsorbs directly at the (0001) surfaces of hexagonal helium bubbles within neutron irradiated beryllium. …”
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    Article
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    Observation of the antimatter helium-4 nucleus by Balewski, Jan T., Betancourt, Michael Joseph, Corliss, Ross Cameron, Hays-Wehle, James Prewitt, Leight, William Axel, Milner, Richard G, Redwine, Robert P, Seele, Joseph Patrick, Steadman, Stephen G, Surrow, Bernd, van Nieuwenhuizen, Gerrit J, Walker, Meredith, STAR Collaboration

    Published 2019
    “…Thus, a high-energy accelerator of heavy nuclei provides an efficient means of producing and studying antimatter. The antimatter helium-4 nucleus (), also known as the anti-(), consists of two antiprotons and two antineutrons (baryon number B = '4). …”
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    Article
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    THE VIBRATIONAL-RELAXATION OF OZONE BY HELIUM-ATOMS by Clary, D

    Published 1982
    “…An ab initio, quantum-mechanical method is used to compute rate coefficients for the vibrational relaxation of ozone in three-dimensional collisions with helium atoms. Good agreement is obtained between the calculated and experimental rate coefficients for the process He + O3(010) - He + O3(000). © 1982.…”
    Journal article
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    New constraints on the formation of the helium lines by Houdebine, E, Smith, G, Jordan, C

    Published 2003
    “…We analyse observations of the helium lines obtained with CDS onboard SOHO. The He I 584.3 Angstrom/O III intensity ratio shows a lower limit and an upper limit that decrease with increasing 0 in intensity. …”
    Conference item
  12. 52

    The formation and properties of helium-degenerate dwarfs by Nelson, L, MacCannell, K, Davis, A

    Published 2001
    “…We have systematically analyzed the evolution of a wide variety of binary systems that ultimately lead to the formation of detached or semi-detached helium degenerate dwarfs (HeDD's). Specifically, we have explored some of the more important dimensions of parameter space including various: (i) metallicities; (ii) mass-transfer rates; and, (iii) states of evolution of the donor at the onset of mass transfer (equivalent to choosing different initial orbital separations). …”
    Conference item
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    Angular acceleration of liquid helium II by Chan, S.L.

    Published 1970
    “…Studies have been made of the processes of angular acceleration and retardation of a simply connected volume of helium II at 1.64°K using the technique of second sound attenuation. …”
    Article
  15. 55

    Improved Line Intensity Analysis of Neutral Helium by Incorporating the Reabsorption Processes in a Helium Collisional-Radiative Model by Keren Lin, Motoshi Goto, Hiroshi Akatsuka

    Published 2023-06-01
    “…In this study, eight emission lines in the visible wavelength range of neutral helium were used to diagnose the electron density and temperature of the Large Helical Device (LHD) helium plasma instead of the conventional three-line method. …”
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    Article
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