31 resultados para Neutrons rapides

em University of Michigan


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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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Work performed at the Argonne National Laboratory.

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Work performed at the Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee.

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An annotated bibliography of 190 items is presented, covering AEC report literature and selected references from the open literature on biological effects of neutrons, gamma radiations, and combinations of both.

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At head of title: U.S. Dept. of Commerce. National Bureau of Standards.

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"Published January 1935. Fifth impression May 1941."

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Mode of access: Internet.

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Includes bibliographies.

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Work performed at the Argonne National Laboratory.

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Includes bibliographical references.