112 resultados para SECTIONS

em University of Michigan


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Federal Highway Administration, Structures and Applied Mechanics Division, Washington, D.C.

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Federal Highway Administration, Structures and Applied Mechanics Division, Washington, D.C.

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"October 1988."

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The measurement of 28O-Mev neutron cross sections of various nuclei is described. The neutron beam used results from 340-Mev protons in the 184-in. cyclotron striking a 2-in. Be target. The neutron detector consists of a double coincidence anthracene scintillation counter telescope which counts recoil protons scattered at 15 deg from a paraffin cylinder placed in the collimated neutron beam. A 2-in. Cu absorber placed between the counters assures that only protons of energy greater than 250 Mev are counted. The cross sections for all nuclei measured from Li to Pb are smaller than the corresponding cross sections measured at 90 Mev by factors between 0.5 and 0.6.

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Work performed at the Argonne National Laboratory.

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Texas Department of Transportation, Austin

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"Expansion of the limited amount of angular

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Includes bibliographical references (p. 30).

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Illustrations on t.p. and p. 25, 103, 131, 187, 191,b and 201.

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"October 2002."