搜索结果: 1-15 共查到“原子核物理学 n x reaction”相关记录24条 . 查询时间(0.109 秒)
Opportunities to constrain astrophysical reaction rates for the s-process through determination of the ground state cross sections
nuclear reactions nucleosynthesis abundances
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2011/7/21
Modern models of s-process nucleosynthesis in stars require stellar reaction rates with high precision. Most of the neutron capture cross sections in the s-process have been measured and for an increa...
Mach-like emission from nucleon scattering in proton-nucleus reaction
nucleon scattering proton-nucleus reaction
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2011/7/20
The fast-stage nucleon emission of proton-nucleus (pA) reactions from 300A MeV to 1.8A GeV has been investigated using the quantum molecular-dynamics model.
Nuclear reaction rates and the primordial nucleosynthesis
Early Universe Nuclear reaction rates Big-Bang Nucleosynthesis
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2011/7/20
The theoretical predictions of the primordial abundances of elements in the big-bang nucleosynthesis (BBN) are dominated by uncertainties in the input nuclear reaction rates. We investigate the effect...
Mach-like emission from nucleon scattering in proton-nucleus reaction
Mach-like emission nucleon scattering proton-nucleus reaction
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2011/7/21
The fast-stage nucleon emission of proton-nucleus (pA) reactions from 300A MeV to 1.8A GeV has been investigated using the quantum molecular-dynamics model. It is found that the sideward angular spect...
High-energy break-up of 6Li as a tool to study the Big-Bang nucleosynthesis reaction 2H(alpha,gamma)6Li
High-energy break-up 6Li tool study the Big-Bang nucleosynthesis reaction 2H(alpha,gamma)6Li
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2010/12/31
The recently claimed observations of non-negligible amounts of 6Li in old halo stars have renewed interest in the Big-Bang Nucleosynthesis (BBN) of 6Li. One important ingredient in the predicted BBN a...
A precise extraction of the induced polarization in the 4He(e,e'p)3H reaction
precise extraction the induced polarization the 4He(e,e'p)3H reaction
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2010/12/29
We measured with unprecedented precision the induced polarization Py in 4He(e,e'p)3H at Q^2 = 0.8 (GeV/c)^2 and 1.3 (GeV/c)^2. The induced polarization is indicative of reaction-mechanism effects beyo...
Helicity-dependent reaction \vec γ\vec d\to πNN and its contribution to the GDH sum rule for the deuteron
Helicity-dependent reaction πNN contribution the GDH sum rule the deuteron
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2010/12/31
Helicity-dependent incoherent pion photoproduction in the reaction \vec \gamma \vec d\to \pi NN is studied in the framework of the diagrammatic approach. Contributions to the reaction amplitude from d...
Helicity-dependent reaction \vec γ\vec d\to πNN and its contribution to the GDH sum rule for the deuteron
Helicity-dependent reaction πNN contribution the GDH sum rule the deuteron
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2010/12/31
Helicity-dependent incoherent pion photoproduction in the reaction \vec \gamma \vec d\to \pi NN is studied in the framework of the diagrammatic approach. Contributions to the reaction amplitude from d...
Measurement of the reaction $γp \rightarrow K^ + \Sigma^{\pm}\pi^{\mp}$ at photon energies up to 2.6 GeV
Measurement the reaction $γp \rightarrow K^ + \Sigma^{\pm}\pi^{\mp}$ photon energies 2.6 GeV
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2011/1/4
The reactions $\gamma p \rightarrow K^{+}\Sigma^{\pm}\pi^{\mp}$ were studied with the SAPHIR detector using a tagged photon beam at the electron stretcher facility ELSA in Bonn. The decays $\Sigma^{-}...
Measurement of the reaction $γp \TO K^ + \Lambda(1520)$ at photon energies up to 2.65 GeV
Measurement the reaction $γp \TO K^ + \Lambda(1520)$ photon energies 2.65 GeV
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2011/1/4
The reaction $\gamma p \TO K^+\Lambda(1520)$ was measured in the energy range from threshold to 2.65 GeV with the SAPHIR detector at the electron stretcher facility ELSA in Bonn. The $\Lambda(1520)$ p...
Helicity-dependent reaction \vec γ\vec d\to πNN and its contribution to the GDH sum rule for the deuteron
Helicity-dependent reaction \vec γ\vec d\to πNN GDH sum rule deuteron
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2011/1/6
Helicity-dependent incoherent pion photoproduction in the reaction ~γ ~d → πNN is studied in the framework of the diagrammatic approach. Contributions to the reaction amplitude from diagrams correspon...
Pt-Decorated PdCo@Pd/C Core-Shell Nanoparticles with Enhanced Stability and Electrocatalytic Activity for Oxygen Reduction Reaction
Core-Shell Nanoparticles Enhanced Stability Electrocatalytic Activity Oxygen Reduction Reaction
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2010/11/25
The high cost and scarcity of Pt pose serious problems for the widespread commercialization of fuel cell technologics.1 Recently, Pd-based cathode catalysts have attracted much attention because Pd po...
Energy calibration of tagged photons by the d(γ, π－pp) reaction
deuteron pion photoproduction tagged photon
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2009/12/24
The energy of tagged photons, which were provided from the internal photon tagging system of the Laboratory of Nuclear Science, Tohoku University, has been calibrated using the d(γ, π－pp) reaction. Ch...
Forward pion-nucleon charge exchange reaction and Regge constraints
pion-nucleon interaction Regge model
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2009/11/24
We present our recent study of pion-nucleon charge exchange amplitudes above 2 GeV. We analyze the forward pion-nucleon charge exchange reaction data in a Regge model and compare the resulting amplitu...
A formula used to subtract the effect of gamma-ray of the others to that ofmeasured reaction in measurement of cross section of nuclear reaction andits application
formula tellurium activation cross sections neutron-induced reactions HPGe detector
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2009/8/17
According to the regulation of growing and decay of artificial radioactive nuclide, a formula used to subtract the effect of characteristic γ-ray of the others to that of measured reaction was deduce...