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Moderated-neutron pulse shapes

Description: The time dependence of the neutron pulse from hydrogeneous moderators is well known in the slowing down region. The full width at half maximum, ..delta..t/sub 50/, behaves as 2/..sqrt..E when time is measured in ..mu..s and energy in eV. The shape of the pulse throughout the slowing down region is a universal function of vt, phi(v,t) = (..sigma../sub s/vt)/sup 2/ exp (-..sigma../sub s/vt). In this equation, v is the neutron velocity, ..sigma../sub s/ the macroscopic cross section of the moderat… more
Date: January 1, 1982
Creator: Taylor, A. D.; Russell, G. J.; Meier, M. M. & Robinson, H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Apparatus for shifting the wavelength of light. [US patent application]

Description: This invention, which resulted from a contract with the United States Department of Energy, relates to a means for shifting the wavelength of light and, more particularly, to a means for changing the wavelength of a laser beam so that the beam can be effectively used in a process for separation uranium isotopes. As disclosed in US Patent 3,940,615, /sup 235/U can be separated from /sup 238/U by selectively ionizing the /sup 235/U isotope in a vapor containing both /sup 235/U and /sup 238/U, thi… more
Date: January 29, 1982
Creator: McCulla, William H. & Allen, John D., Jr.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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