نتایج جستجو برای: 3he
تعداد نتایج: 1796 فیلتر نتایج به سال:
The article “Thickness Dependence of Critical Current Superfluid 3He Film”, written by Masamichi Saitoh, Kimitoshi Kono, was originally published electronically on the publisher's internet portal 26 May 2007 without open access.
The interplay of bulk and boundary scattering is explored in a regime where quantum size effects modify mesoscopic transport in a degenerate Fermi liquid film of 3He on a rough surface. We discuss mass transport and the momentum relaxation time of the film in a torsional oscillator geometry within the framework of a quasiclassical theory that includes the experimentally determined power spectru...
The total energies and various bound state properties of the excited 21S(L = 0)−states in two-electron helium atoms, including the ∞He, 4He and 3He atoms, are determined to very high numerical accuracy. The convergence of the results obtained for some electron-nuclear and electronelectron expectation values and, in particular, for the electron-nuclear and electron-electron cusp values, is discu...
We present the pT spectra, elliptic flow (v2) and coalescence parameters B2 for d, d (1 < pT < 4 GeV/c) and B3 for He, 3He (2 < pT < 6 GeV/c) produced at mid-rapidity in Au+Au collisions at √ s NN = 200 GeV. The results are measured in the STAR experiment at RHIC. The spectra of the light nuclei show softer pT distributions than calculations from a blast-wave model in which the parameters were ...
A dependence of the isobaric ratio Y(3H)/Y(3He) on the N/Z ratio of the reconstructed quasiprojectile for the reaction of 28Si beam with 112,124Sn targets at two different projectile energies of 30 and 50 MeV/nucleon is presented. We demonstrate a linear dependence of the observable ln(Y(3H)/Y(3He)) on the N/Z ratio of the quasiprojectile and show the dependence of the slope on the reconstructe...
Experimental radionuclide production cross sections have been collected for protons with energy similar to those protons produced in a D-3He fusion reactor. Proton energy-dependent cross sections (Ep < 14.7 MeV) were used along with the proton stopping data of Anderson and Ziegler to produce a proton-induced thick-target radionuclide activation yields library. In its present form, the library c...
The plastic deformation of bee 3He crystals has been studied near the melting curve, in the temperature range 0.65 K :::; T:::; 1.17 K, and for strain rates, E, from 2X 10to 2X 10sec-I. The resulting relations between strain rate and stress, at a given temperature, are accounted for in terms of dislocation climb and vacancy diffusion in the solid He. The temperature dependence of the strain rat...
The study of lung emphysema dates back to the beginning of the 17th century. Nevertheless, a number of important questions remain unanswered because a quantitative localized characterization of emphysema requires knowledge of lung structure at the alveolar level in the intact living lung. This information is not available from traditional imaging modalities and pulmonary function tests. Herein,...
In this article, we have calculated some thermodynamic properties for a system consisting of singy ionized 3He atoms and their corresponding removed electrons by employing the second quantization method at finite temperature. To perform the calculations, we have considered the kinetic term, and Coulomb interaction between the particles in our Hamiltonian. The calculated properties are free ener...
The Joint European Torus (JET) gamma-ray camera has been recently upgraded with the installation of new detectors, based on LaBr3(Ce) scintillation crystals, which add spectroscopic capability to existing system allowing measurements good energy resolution (5% at 0.622 MeV), a dynamic range from hundreds keV up about 30 MeV, and high counting rate capabilities MCps. First during C38 campaign JE...
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