Results 1 to 10 of about 482,823 (345)
A Study of the Residual 39Ar Content in Argon from Underground Sources [PDF]
Astroparticle Physics, Volume 66 (2015) 53-60, 2012 The discovery of argon from underground sources with significantly less 39Ar than atmospheric argon was an important step in the development of direct-detection dark matter experiments using argon as the active target. We report on the design and operation of a low background detector with a single phase liquid argon target that was built to study the ...
A. Goretti +44 more
arxiv +3 more sources
Discovery of underground argon with low level of radioactive 39Ar and possible applications to WIMP dark matter detectors [PDF]
J.Phys.Conf.Ser.120:042015,2008, 2007 We report on the first measurement of 39Ar in argon from underground natural gas reservoirs. The gas stored in the US National Helium Reserve was found to contain a low level of 39Ar. The ratio of 39Ar to stable argon was found to be <=4x10-17 (84% C.L.), less than 5% the value in atmospheric argon (39Ar/Ar=8x10-16).
A Bazarko +85 more
arxiv +3 more sources
Discovery of photospheric argon in very hot central stars of planetary nebulae and white dwarfs [PDF]
, 2007 We report the first discovery of argon in hot evolved stars and white dwarfs. We have identified the ArVII 1063.55A line in some of the hottest known (Teff=95000-110000 K) central stars of planetary nebulae and (pre-) white dwarfs of various spectral type. We determine the argon abundance and compare it to theoretical predictions from stellar evolution
Barstow +30 more
arxiv +4 more sources
Low temperature scattering with the R-matrix method: argon-argon scattering [PDF]
, 2019 Results for elastic atom-atom scattering are obtained as a first practical application of RmatReact, a new code for generating high-accuracy scattering observables from potential energy curves. RmatReact has been created in response to new experimental methods which have paved the way for the routine production of ultracold atoms and molecules, and ...
McKemmish, Laura K. +3 more
arxiv +3 more sources
Nature, 1904 IN your translation of Prof. Mendeleeff's interesting paper on the chemical elements (November 17, p. 94) I see that he attributes the discovery of argon and its congeners to Ramsay. Am I not right in believing that it was Lord Rayleigh who discovered argon, and that it was he who gave that impulse to chemistry which Sir William Ramsay has carried ...
F. A. Lucas, Thomas Holdich, Knox Pp
openalex +4 more sources
Laser gas-discharge absorption measurements of the ratio of two transition rates in argon [PDF]
, 2002 The ratio of two line strengths at 922.7 nm and 978.7 nm of argon is measured in an argon pulsed discharge with the use of a single-mode Ti:Sapphire laser. The result 3.29(0.13) is in agreement with our theoretical prediction 3.23 and with a less accurate ratio 2.89(0.43) from the NIST database.
A. Hirabayashi +15 more
arxiv +3 more sources
Re‐evaluation of argon (E 938) and helium (E 939) as food additives [PDF]
EFSA JournalThe Panel on Food Additives and Flavourings (FAF) provides a scientific opinion re‐evaluating the safety of the two food additives argon (E 938) and helium (E 939). Argon (Ar) and helium (He) are two noble gases, highly stable single atoms.
EFSA FAF Panel (EFSA Panel on Food Additives and Flavourings) +21 more
doaj +2 more sources
Direct dating of overprinting fluid systems in the Martabe epithermal gold deposit using highly retentive alunite [PDF]
Geochronology, 2023 The Martabe gold deposits in Sumatra formed in a shallow crustal epithermal environment associated with intermediate mafic intrusions adjacent to an active right-lateral wrench system. Gas/fluid temperatures reached 200–350 ∘C.
J. Muston +5 more
doaj +1 more source
Geologica Acta, 2021 The Lipovany and Mučín paleobotanical localities contain important floral associations within the tuff horizons, which were used for determination of subtropical to tropical climatic conditions during the Early Miocene.
Katarína Šarinová +8 more
doaj +1 more source