Results 31 to 40 of about 676,534 (379)
The Hubble Space Telescope UV legacy survey of galactic globular clusters – XVI. The helium abundance of multiple populations [PDF]
Monthly notices of the Royal Astronomical Society, 2018 Recent work, based on data from the Hubble Space Telescope (HST) UV Legacy Survey of Galactic Globular Clusters (GCs), has revealed that all the analyzed clusters host two groups of first- (1G) and second-generation (2G) stars.
A. Milone +20 more
semanticscholar +1 more source
Applied Sciences, 2020 Massive underground storage of hydrogen could be a way that excess energy is produced in the future, provided that the risks of leakage of this highly flammable gas are managed. The ROSTOCK-H research project plans to simulate a sudden hydrogen leak into
Stéphane Lafortune +5 more
doaj +1 more source
Helium Absorption at 1083 nm from Extended Exoplanet Atmospheres: Dependence on Stellar Radiation [PDF]
Astrophysical Journal, 2019 Strong absorption signatures in the helium line at 1083 nm have recently been detected in transmission spectra of several close-in exoplanets. This absorption line originates from neutral helium atoms in an excited, metastable 23S state.
A. Oklopčić
semanticscholar +1 more source
Site-selectively generated photon emitters in monolayer MoS2 via local helium ion irradiation
Nature Communications, 2019 Quantum light sources in solid-state systems are of major interest as a basic ingredient for integrated quantum photonic technologies. The ability to tailor quantum emitters via site-selective defect engineering is essential for realizing scalable ...
J. Klein +24 more
semanticscholar +1 more source
Proton and Helium Spectra from the CREAM-III Flight [PDF]
, 2017 Primary cosmic-ray elemental spectra have been measured with the balloon-borne Cosmic Ray Energetics And Mass (CREAM) experiment since 2004. The third CREAM payload (CREAM-III) flew for 29 days during the 2007–2008 Antarctic season.
Y. Yoon +24 more
semanticscholar +1 more source
Proceedings of the National Academy of Sciences, 1998 The ratio 3 He/ 4 He (R) plays a central role in models of mantle evolution that propose an undegassed lower mantle, rich in the primordial isotope 3 He. A large primordial volatile-rich reservoir, a feature of recent models, is inconsistent with high-temperature ...
openaire +4 more sources
Geochemistry, Geophysics, Geosystems, 2022 Water column physico‐chemical studies were conducted over the southern Central Indian Ridge between 24°44’S and 25°52’S to identify and chemically characterize seafloor hydrothermal activity.
L. Surya Prakash +9 more
doaj +1 more source
Neonatal Applications of Heliox: A Practical Review
Frontiers in Pediatrics, 2022 Heliox is a mixture of helium and oxygen that may be utilized as an alternative to air-oxygen during the ventilatory support in the neonate. Special physical properties of Heliox, particularly low density, allow for improved gas flow and diffusion. First
Tomasz Szczapa +2 more
doaj +1 more source
The Helium and Carbon Isotope Characteristics of the Andean Convergent Margin
Frontiers in Earth Science, 2022 Subduction zones represent the interface between Earth’s interior (crust and mantle) and exterior (atmosphere and oceans), where carbon and other volatile elements are actively cycled between Earth reservoirs by plate tectonics.
P. H. Barry +30 more
doaj +1 more source