نتایج جستجو برای: neutron diffusion
تعداد نتایج: 208482 فیلتر نتایج به سال:
background: several landmine detection methods, based on nuclear techniques, have been suggested during the recent years. neutron energy moderation, neutron-induced gamma emission, neutron and gamma attenuation, and fast neutron backscattering are nuclear-based methods used for landmine detection. the aim of this study is to use backscattered neutron for landmine detection. materials and method...
The continuing drive by the semiconductor industry to fabricate smaller structures using photolithography will soon require dimensional control at length scales comparable to the size of the polymeric molecules in the materials used to pattern them. The current technology, chemically amplified photoresists, uses a complex reaction-diffusion process to delineate patterned areas with high spatial...
2014 Recent R.M.N. and quasi-elastic neutron scattering experiments on smectics A have given comparable values for the self-diffusion coefficients D~ (diffusion normal to the layers) and D~, in spite of the possible occurence of a permeation process which would lead to much lower values for D ~. It is shown that there is no permeation in a self-diffusion experiment, and therefore that the Einst...
This article is a survey of the theoretical questions arising in the development of a convergence theory and error analysis of synthesid methods for solving neutron dif fusion problems. For simplicity, we discuss convergence and the error analysis for spectral synthesis methods, in which the trial functions are functions solely of energy. The diffusion coefficient, the total and scattering cros...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید