118 research outputs found
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Flow and temperature fields in a free discharge inductively coupled plasma
Computations were made of the flow and temperature fields in an inductively coupled argon plasma at atmospheric pressure under confined and free discharge conditions. The model takes into account gravity effects and swirl in the sheath gas. Natural convection was found to have a negligible effect on the flow and temperature fields under confined discharge conditions but a significant effect for the free discharge. The back flow in the discharge was substantially reduced in the presence of swirl for swirl velocities over the range 0-50 m/s. Also with a mode-rate increase in swirl, the conduction heat flux to the wall decreased but increased with the further increase in swirl. From an overall energy balance point of view, conductive heat flux to the wall of the plasma confinement tube was substantially lower for a free plasma discharge compared to that for a confined plasma
Study of the first excited state in 5Li
The reaction 6Li(3He, α)5Li(α)p has been studied with a 1.8 MeV incident 3He beam. Coincidence spectra (α - α) were measured at θ1 = 25°, 35°, 40° and θ2 = - 150°. The purpose was to locate the first excited state of 5Li. The analysis yields Ex = 3.2 ± 0.2 MeV and Γ = 1.5 ± 0.5 MeV .La réaction 6Li(3He, α)5Li( α)p a été étudiée à 1,8 MeV incident par la méthode des coincidences (α - α), pour les positions angulaires θ1 = 25°, 35°, 40° et θ2 = - 150°, dans le but de déduire les caractéristiques du 1er état excité de 5Li. Tous les spectres expérimentaux sont bien expliqués si l'on prend pour ce niveau Ex = 3,2 ± 0,2 MeV et Γ = 1,5 ± 0,5 MeV
The acceptability and effectiveness of textbook material revised using instructional design criteria
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