helium atoms
Nuclear-Charge Screening in Positronium Formation from Helium Atoms
... with helium atoms based on the momentum- space coupled-channel optical (CCO) method by Zhou and co-workers [23], second-order distorted-wave approximation (DWA2) by Sen and Mandal [24], two- center ...
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Divertor Plasma Simulation Experiment Using Hydrogen Ionizing Plasma and Helium Ion Beam in an RF Plasma Source DT-ALPHA
... the helium ion beam and the helium ...For helium ions of E = 10 keV, the cross section of the CX interaction with helium atoms is σ ∼ 10 − 19 m 2 ...ciated atoms can be excited ...
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Novel method for state selective determination of electron-impact-excitation cross sections from 0° to 180°
... excited helium atoms is depicted as a function of projectile ...Expected helium yield curves at higher and lower energy resolution are shown for comparison as ...
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Atomically resolved phase transition of fullerene cations solvated in helium droplets
... open circle, left y axis) and 964 nm (red open triangle, right axis) plotted as a function of n, the number of helium ad-atoms on the fullerene ion surface. The error bars indicate s.e.m. of the centre ...
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Metastable aluminium atoms floating on the surface of helium nanodroplets
... aluminium atoms have been ablated by laser from a solid sample of the metal in the presence of helium ...aluminium atoms in the 4 P (3s3p 2 ) state at ~29,000cm -1 above the ground state [19-21] has ...
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Spectrally resolved helium absorption from the extended atmosphere of a warm Neptune-mass exoplanet
... HAT-P-11b helium absorption ...Metastable helium atoms are colored as a function of their radial velocity in the stellar rest frame (see color ...
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Collisional-Radiative Model for Spectroscopic Diagnostic of Optically Thick Helium Plasma
... We have included the effect of radiation trapping in a collisional-radiative model of neutral helium atoms developed by Goto [M. Goto, JQSRT 76, 331 (2003)], which is used to determine the electron ...
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Triple Hybrid Simulation Method for Tungsten Fuzzy Nanostructure Formation
... We next consider the relationship between computa- tional time and elapsed time from the viewpoint of compu- tational efficiency. In particular, in the hybrid simulation, the load balance between the simulation methods ...
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Spectroscopic Diagnostic of Helium-Hydrogen RF Plasma under the Influence of Radiation Trapping
... both atoms. At the same time, we understand that singlet P state helium atoms are produced predominantly by photoexcita- tion, and the population of the upper state of the Balmer α line is strongly ...
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The influence of foreign gases on gaseous spectra
... The helium or neon atoms by elastic collisions with molecules of CN, increase the total path of the electrons, and thus increase the chance of colliding with a molecule of ...between helium ...
131
Gaseous mediators: an updated review on the effects of helium beyond blowing up balloons
... of helium (70%) for 5 min before cardiac arrest, plus 30 min after restoration of spontaneous circulation (ROSC) led to reduced myocardial apoptosis along with a differential expression of caveolin-1 and ...
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Applications of the Variational Quantum Monte Carlo Method to the Two-Electron Atoms
... the helium atom and its ...of helium and its ions calculated by using wave functions from the orbital product times correlated function depending on the distance between the two ...
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Mechanism of collision induced decomposition of gaseous multiatomic ions
... The FD-M IKE spectrum o f [M+K]+ molecule-ions o f the peptide valine- gramicidin A (m/z 1920.2) is show n in Figure 5.14. The incident ion energy was 14.9 IceV, the collision gas helium and an attenuation o f 70 ...
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H- line in a corona helium plasma: a multi-code line
... Theoretical Stark profiles of the H-β line calculated for hydrogen atoms in a helium plasma 137.. with an electron density of 10 16 cm -3 and a temperature of 0.1 eV for both plasma H[r] ...
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Dynamic Simulation of Multiplier Effects of Helium Plasma and Neutron Irradiation on Microstructural Evolution in Tungsten
... of helium plasma on the micro- structural evolution induced by neutron irradiation, computer simulations based on the rate theory considering both helium and defect diffusions were ...performed. ...
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Energy levels in muonic helium
... muonic helium is planned at J-PARC MUSE [13] because high intensity pulsed negative muon beam gives an opportunity to improve the result (1) by two orders of ...muonic helium atom using the stochastic ...
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Look better. Single atoms in chemistry, and single atoms in physics
... Figure 2. 3-D successive snap shots in time of velocity-distribution data of a gas of 87Rb atoms in which the atoms condense from less dense red, yellow and green areas into very dense blue to white areas. ...
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Semiclassical study of atoms by periodic orbit theory: Diffraction in atoms
... This research was initially motivated by the need for more accurate semiclassical methods of interpretation and modelling of non-hydrogenic spectra in external fields. It combines two important theories, on one hand ...
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THE VOLUME OF THE LUNG DETERMINED BY HELIUM DILUTION DESCRIPTION OF THE METHOD AND COMPARISON WITH OTHER PROCEDURES
... of helium distributed in a volume of approximately 8 liters of lung plus spirometer gas is not easy to find by analysis for differences in concentration, for at a helium concentration of[r] ...
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A comprehensive global oceanic dataset of helium isotope and tritium measurements
... dissolved helium. Second, the degassed water is stored in a helium leak-tight container (usually low- He-permeability aluminosilicate glass or metal) for a period of several weeks to a year or ...
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