نتایج جستجو برای: 3he
تعداد نتایج: 1796 فیلتر نتایج به سال:
In this paper, we address the relations between the structure, electronic level structure, energetics, and localization dynamics of an excess electron in a bubble in liquid 4He, 3He, and Ne. Our treatment of the dynamics of formation for the electron bubble rests on a quantum mechanical Wigner-Seitz description of the excess electron in conjunction with a hydrodynamic picture for the liquid. Th...
Bachground: Hadron therapy is a novel technique of cancer radiation therapy which employs charged particles beams, 1H and light ions in particular. Due to their physical and radiobiological properties, they allow one to obtain a more conformal treatment, sparing better the healthy tissues located in proximity of the tumor and allowing a higher control of the disease. Â Objective: As it is well ...
M. Dann, J. Nyéki,* B. P. Cowan, and J. Saunders Millikelvin Laboratory, Department of Physics, Royal Holloway University of London, Egham, Surrey, TW20 0EX, United Kingdom (Received 28 January 1999) Measurements are reported of the heat capacity of 3He bound to an atomically layered 4He film on the surface of graphite. At 3He coverages n3 , 4 nm22, the 3He forms a uniform 2D Fermi system. Ther...
Quantitative measurement of lung microstructure is of great significance in assessment of pulmonary disease, particularly in the earliest stages. The technique for MRI-based 3He lung morphometry was previously developed and validated for human lungs, and was recently extended to ex vivo mouse lungs. The technique yields accurate, quantitative information about the microstructure and geometry of...
Kaon photoproduction on 3He, γ + 3He −→ K+ + ΛH, is studied in the framework of the impulse approximation. Realistic 3He wave functions obtained as solutions of Faddeev equations with the Reid soft-core potential are used along with a simple ΛH wave function. Results are compared for several elementary operator models, which can successfully describe the elementary kaon production off the proto...
For backward elastic scattering of deuterons by 3He, cross sections σ and tensor analyzing power T20 are measured at Ed = 140 − 270 MeV. The data are analyzed by the PWIA and by the general formula which includes virtual excitations of other channels, with the assumption of the proton transfer from 3He to the deuteron. Using 3He wave functions calculated by the Faddeev equation, the PWIA descri...
فراوانی سوخت های مورد نیاز در همجوشی هسته ای یکی از بزرگترین مزایای این روش تولید انرژی، نسبت به شکافت هسته ای می باشد. در این کار تحقیقانی، همجوشی مغناطیسی پلاسمای d-3he را در راکتور توکامک iter- 90hp مورد بررسی قرار داده و با حل معادلات توازن انرژی حاکم بر همجوشی هسته ای به روش خطی، تغییرات برخی از پارامتر های حاکم بر پلاسما را در دو حالت بدون ناخالصی و در حضور ناخالصی بدست می آوریم.
We present experimental observations of the suppressed superfluid transition temperature, Tca, superfluid fraction, ρs/ρ and Leggett frequency of 3He-B in aerogel, ΩBa. We determine Tca from mass decoupling and the vanishing of the frequency shift away from the Larmor frequency in our different samples and different laboratories. We find that the suppressed transition temperature for 3He in aer...
Differential cross sections from the 24Mg(3He, t)Z4Al reaction have been measured from 0 to 32” in the laboratory system. DWBA calculations using an effective projectile-nucleon interaction are compared with the data to verify the applicability of such an approach as well as to deduce spectroscopic information. By employing DWBA in conjunction with transition amplitudes obtained from realistic ...
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