搜索结果: 61-75 共查到“理学 Measurement”相关记录382条 . 查询时间(0.175 秒)
Remote frequency measurement of the 1S0-3P1 transition in laser cooled 24Mg
Remote frequency measurement 1S0-3P1 transition laser cooled 24Mg Quantum Gases
2011/8/4
Abstract: We perform Ramsey-Borde spectroscopy on laser cooled magnesium atoms in free fall to measure the 1S0-3P1 intercombination transition frequency. The measured value of 655 659 923 839 730 (48)...
Improved Measurement of the Hydrogen 1S - 2S Transition Frequency
Hydrogen 1S - 2S Transition Frequency atomic hydrogen photon spectroscopy
2011/8/4
Abstract: We have measured the 1S - 2S transition frequency in atomic hydrogen via two photon spectroscopy on a 5.8 K atomic beam. We obtain $f_{1S-2S} = 2 466 061 413 187 035 (10)$ Hz for the hyperfi...
Measurement of the $ν_e$ and Total $^{8}$B Solar Neutrino Fluxes with the Sudbury Neutrino Observatory Phase-III Data Set
Measurement Total $^{8}$B Solar Neutrino Fluxes udbury Neutrino Observatory
2011/10/17
This paper details the solar neutrino analysis of the 385.17-day Phase-III data set acquired by the Sudbury Neutrino Observatory (SNO). An array of $^3$He proportional counters was installed in the he...
Holographic Measurement and Improvement of the Green Bank Telescope Surface
cosmology:large-scale structure gravitational lensing methods:analytical
2011/10/8
The topic of this article is weak cosmic shear tomography where the line of sight-weighting is carried out with a set of specifically constructed orthogonal polynomials, dubbed TaRDiS (Tomography with...
Holographic Measurement and Improvement of the Green Bank Telescope Surface
Holographic Measurement Improvement Green Bank Telescope Surface
2011/10/8
We describe the successful design, implementation, and operation of a 12 GHz holography system installed on the Robert C. Byrd Green Bank Telescope (GBT). We have used a geostationary satellite beacon...
Accurate Group Delay Measurement for Radial Velocity Instruments Using the Dispersed Fixed Delay Interferometer Method
Radial Velocity Dispersed Interferometer Method
2011/9/30
The Dispersed Fixed Delay Interferometer (DFDI) method is attractive for its low cost, compact size and multi-object capability in precision radial velocity (RV) measurements. The phase shift of fring...
Measurement Design for Detecting Sparse Signals
Sparse Signals Information Theory Measurement Design
2011/8/31
Abstract: We consider the problem of testing for the presence (or detection) of an unknown sparse signal in additive white noise. Given a fixed measurement budget, much smaller than the dimension of t...
Nullity of Measurement-induced Nonlocality
Nullity of Measurement-induced Nonlocality Functional Analysis
2011/9/29
Abstract: Measurement-induced nonlocality is a measure of nonlocality introduced by Luo and Fu [Phys. Rev. Lett. \textbf{106}, 120401(2011)]. In this paper, we present a sufficient and necessary condi...
Diffuse emission measurement with INTEGRAL/SPI as indirect probe of cosmic-ray electrons and positrons
Galaxy: general ?Galaxy structure ?gamma rays observations
2011/8/24
Significant advances have been made in the understanding of the diffuse Galactic hard X-ray continuum emission using data from the INTEGRAL observatory. The diffuse hard power-law component seen with ...
Measurement of the gas-flow reduction factor of the KATRIN DPS2-F differential pumping section
gas flow RGA residual gas analyzer vacuum measurement free molecular flow turbo-molecular gas flow RGA residual gas analyzer vacuum measurement free molecular flow turbo-molecular
2011/8/1
Abstract: We determined the gas-flow reduction factor of the second forward Differential Pumping Section (DPS2-F) for the KATRIN experiment using a dedicated vacuum-measurement setup and by detailed m...
Diffuse emission measurement with INTEGRAL/SPI as indirect probe of cosmic-ray electrons and positrons
INTEGRAL/SPI indirect probe cosmic-ray electrons positrons
2011/9/26
Significant advances have been made in the understanding of the diffuse Galactic hard X-ray continuum emission using data from the INTEGRAL observatory. The diffuse hard power-law component seen with ...
Momentum measurement by the Multiple Coulomb Scattering method in the OPERA lead emulsion target
Momentum measurement the Multiple Coulomb Scattering method
2011/9/9
A new method of momentum measurement of charged particles through Multiple Coulomb Scattering (MCS) in the OPERA lead emulsion target is presented. It is based on precise measurements of track angular...
Measurement of the nuclear modification factor of electrons from heavy-flavour decays at mid-rapidity in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV with ALICE
nuclear modification electrons heavy-flavour decays Pb-Pb collisions
2011/7/21
We present results on inclusive electrons for 1.5 $ < p_{\rm T} < $ 6 GeV/$c$ in {Pb-Pb} collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV measured with ALICE at the LHC and compare these to a cocktail of ...
Differential energy measurement between He- and Li-like uranium intra-shell transitions
energy measurement He- and Li-like uranium intra-shell transitions
2011/9/5
We present the first clear identification and highly accurate measurement of the intra-shell transition 1s2p 3P2 ! 1s2s 3S1 of He-like uranium performed via X-ray spectroscopy.The present experiment h...
Measurement of airborne 131I, 134Cs, and 137Cs nuclides due to the Fukushima reactors accident in air particulate in Milan (Italy)
Airborne radioactivity, Fukushima accident, 131I, 137Cs and 134Cs
2011/9/5
After the earthquake and the tsunami occurred in Japan on 11th March 2011, four of the Fukushima reactors had released in air a large amount of radioactive isotopes that had been diffused all over the...