Results 21 to 30 of about 84,873 (261)

Ground-State Structures of Atomic Metallic Hydrogen

Physical Review Letters, 2011
Ab initio random structure searching using density functional theory is used to determine the ground-state structures of atomic metallic hydrogen from 500 GPa to 5 TPa. Including proton zero-point motion within the harmonic approximation, we estimate that molecular hydrogen dissociates into a monatomic body-centered tetragonal structure near 500 GPa (r(
Jeffrey M, McMahon, David M, Ceperley
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Transport of ground-state hydrogen atoms in a plasma expansion [PDF]

Physical Review E, 2001
The transport of ground-state atomic hydrogen in the expansion of a thermal plasma generated from an Ar-H2 mixture is studied by means of laser-based diagnostic techniques. The flow of hydrogen atoms is investigated by two-photon excitation laser-induced fluorescence (LIF), whereas Ar atoms are probed by LIF as well as by UV Rayleigh scattering.
Mazouffre, S., Boogaarts, M.G.H., Bakker, I.S.J., Vankan, P.J.W., Engeln, R.A.H., Schram, D.C.   +5 more
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Hyperfine ground-state structure of muonic hydrogen [PDF]

Journal of Experimental and Theoretical Physics, 2004
Corrections of orders α5 and α6 to the superfine ground-state structure of the muonic hydrogen atom were calculated. The calculations took into account the effects of the structure of the nucleus on one-and two-loop Feynman amplitudes with the help of the electromagnetic form factors of the proton and the modification of the superfine part of the Breit
A. P. Martynenko, R. N. Faustov
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Constraining Born–Infeld-like nonlinear electrodynamics using hydrogen’s ionization energy

European Physical Journal C: Particles and Fields, 2018
In this work, the hydrogen’s ionization energy was used to constrain the free parameter b of three Born–Infeld-like electrodynamics namely Born–Infeld itself, Logarithmic electrodynamics and Exponential electrodynamics.
P. Niau Akmansoy, L. G. Medeiros
doaj   +1 more source

Nuclear conversion theory: molecular hydrogen in non-magnetic insulators [PDF]

Royal Society Open Science, 2016
The hydrogen conversion patterns on non-magnetic solids sensitively depend upon the degree of singlet/triplet mixing in the intermediates of the catalytic reaction. Three main ‘symmetry-breaking’ interactions are brought together.
Ernest Ilisca, Filippo Ghiglieno
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In-beam measurement of the hydrogen hyperfine splitting and prospects for antihydrogen spectroscopy

Nature Communications, 2017
Comparing the ground-state hyperfine structure of antihydrogen to that of hydrogen will provide insights into CPT symmetry in nature. Here the authors report the most precise in-beam measurement of this quantity for hydrogen to demonstrate the viability ...
M. Diermaier, C. B. Jepsen, B. Kolbinger, C. Malbrunot, O. Massiczek, C. Sauerzopf, M. C. Simon, J. Zmeskal, E. Widmann   +8 more
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The Necessity and Feasibility of Hydrogen Storage for Large-Scale, Long-Term Energy Storage in the New Power System in China

Energies, 2023
In the process of building a new power system with new energy sources as the mainstay, wind power and photovoltaic energy enter the multiplication stage with randomness and uncertainty, and the foundation and support role of large-scale long-time energy ...
Huaguang Yan, Wenda Zhang, Jiandong Kang, Tiejiang Yuan   +3 more
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Identical spin rotation effect and electron spin waves in quantum gas of atomic hydrogen

New Journal of Physics, 2018
We present an experimental study of electron spin waves in atomic hydrogen gas compressed to high densities of ∼5 × 10 ^18 cm ^−3 at temperatures ranging from 0.26 to 0.6 K in the strong magnetic field of 4.6 T.
L Lehtonen, O Vainio, J Ahokas, J Järvinen, S Novotny, S Sheludyakov, K-A Suominen, S Vasiliev, V V Khmelenko, D M Lee   +9 more
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Anderson localization of a Rydberg electron

Physical Review Research, 2023
Highly excited Rydberg atoms inherit their level structure, symmetries, and scaling behavior from the hydrogen atom. We demonstrate that these fundamental properties enable a thermodynamic limit of a single Rydberg atom subjected to interactions with ...
Matthew T. Eiles, Alexander Eisfeld, Jan M. Rost   +2 more
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Spectroscopic Measurement of Hydrogen Atom Density in a Plasma Produced with 28 GHz ECH in QUEST

Atoms, 2020
The spatial distribution of the hydrogen atom density was evaluated in a spherical tokamak (ST) plasma sustained only with 28 GHz electron cyclotron heating (ECH). The radially resolved Hδ emissivity was measured using multiple viewing chord spectroscopy
Satoru Mori, Taiichi Shikama, Kazuaki Hanada, Nao Yoneda, Arseniy Kuzmin, Masahiro Hasuo, Hiroshi Idei, Takumi Onchi, Akira Ejiri, Yuki Osawa, Yi Peng, Kyohei Matsuzaki, Shinichiro Kado, Keiji Sawada, Takeshi Ido, Kazuo Nakamura, Ryuya Ikezoe, Yoshihiko Nagashima, Makoto Hasegawa, Kengo Kuroda, Aki Higashijima, Takahiro Nagata, Shun Shimabukuro   +22 more
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