搜索结果: 1-15 共查到“知识库 理学 helium”相关记录52条 . 查询时间(0.046 秒)
Depth profiling analysis of solar wind helium collected in diamond-like carbon film from Genesis
solar wind depth profile helium NASA Genesis mission post-ionization
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2017/4/10
The distribution of solar-wind ions in Genesis mission collectors, as determined by depth profiling analysis, constrains
the physics of ion-solid interactions involving the solar wind. Thus, they pro...
Luttinger Liquid in the Core of a Screw Dislocation in Helium-4
Monte carlo simulation hexagonal shaft screw crystals superfluids screw dislocation
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2014/12/20
On the basis of first-principles Monte Carlo simulations we find that the screw dislocation along the hexagonal axis of an hcp 4He crystal features a superfluid (at T→0) core. This is the first exampl...
Iron and helium emission lines in classical T Tauri stars
Emissions Molecular cloud Emissions High resolution Echelle spectrum The center of mass velocity
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2014/12/9
Results are presented for the He emission in 31 CTTS from the Taurus-Auriga molecular cloud spanning two orders of magnitude in the mass accretion rate, and for the Fe emission in DR Tau, based on a s...
Helium and Argon Isotopic Studies of Fossil Material and the Theoretical Evolution of He and Ar in Earth’s Atmosphere through Time
Fossils Argon Helium Isotopes Atmospheric Evolution
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2013/3/11
We analyzed the elemental concentrations and the isotopic compositions of helium and argon in Cambrian to Jurrassic aged Gastropod, Ammonite and Trilobite fossils in order to examine variation in thes...
Quantum Interferometry and Correlated Two-Electron Wave-Packet Observation in Helium
Quantum Interferometry Correlated Two-Electron Wave-Packet Observation Helium Atomic Physics
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2012/5/17
The concerted motion of two or more bound electrons governs atomic and molecular non-equilibrium processes and chemical reactions. It is thus a long-standing scientific dream to measure the dynamics o...
Simultaneous and sensitive analysis of inorganic and organic gaseous compounds by pulsed discharge helium ionization detector (PDHID)
micropacked column simultaneous and sensitive analysis organic gases inorganic gases
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2017/4/11
A simple gas chromatographic method has been developed for the simultaneous and sensitive analysis of inorganic
(H2, CO, and CO2) and organic gaseous compounds (CH4, C2H4, C2H6, C3H6, C3H8, iso-C4H10...
Dopant induced ignition of helium nanodroplets in intense few-cycle laser pulses
Dopant helium nanodroplets intense few-cycle laser pulses rare-gas
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2011/8/11
Abstract: We demonstrate ultrafast resonant energy absorption of rare-gas doped He nanodroplets from intense few-cycle (~10 fs) laser pulses. We find that less than 10 dopant atoms "ignite" the drople...
A <= 6 helium clusters using soft core potentials
helium clusters soft core potentials
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2011/7/21
In this work we investigate small clusters of helium atoms using the hyperspherical harmonic basis.
Pion productions by proton and Helium-3 on Au197 target at beam energies of 2.8, 5, 10 and 16.587 GeV/nucleon
GeV/nucleon
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2011/7/20
Based on a Relativistic Boltzmann-Uehling- Uhlenbeck transport model, proton and $^{3}$He induced reactions on $^{197}$Au target at beam energies of 2.8, 5, 10 and 16.587 GeV/nucleon are studied.
Pseudospectral Calculation of Helium Wave Functions, Expectation Values, and Oscillator Strength
Pseudospectral Calculation Helium Wave Function Expectation Values Oscillator Strength
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2011/8/4
Pseudospectral Calculation of Helium Wave Functions, Expectation Values, and Oscillator Strength.
Relativistic Reduced-Mass and Recoil Corrections to Vacuum Polarization in Muonic Hydrogen, Muonic Deuterium and Muonic Helium Ions
Relativistic Reduced-Mass Recoil Corrections Vacuum Polarization Muonic Hydrogen Muonic Deuterium Muonic Helium Ions
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2011/8/3
Relativistic Reduced-Mass and Recoil Corrections to Vacuum Polarization in Muonic Hydrogen, Muonic Deuterium and Muonic Helium Ions.
Benchmark helium dimer and trimer calculations with a public few-body code
Benchmark helium dimer trimer calculations public few-body code
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2011/8/2
Benchmark helium dimer and trimer calculations with a public few-body code.
Detailed study of dissipative quantum dynamics of K-2 attached to helium nanodroplets
K-2 helium nanodroplets
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2011/9/9
We thoroughly investigate vibrational quantum dynamics of dimers attached to He droplets motivated by recent measurements with K2 [1]. For those femtosecond pump-probe experiments, crucial observed fe...
A <= 6 helium clusters using soft core potentials
helium clusters soft core potentials
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2011/9/2
In this work we investigate small clusters of helium atoms using the hyperspherical harmonic basis. We consider systems with A = 2, 3, 4, 5, 6 atoms with an inter-particle potential which does not pre...
The application of the pseudostate-close-coupling method using a non-orthogonal Laguerre-L^2 basis for electron-helium scattering
Differential and total cross sections Elastic and excitation
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2010/9/25
Differential and total cross sections for elastic and excitation from the ground state to n ≤ 2 states of atomic helium by electrons are computed for incident energies in the range from 5 to 50 eV. Th...