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Production of mesons by x-rays

Autor: Edwin M McMillan; Jack M Peterson; R Stephen White; Lawrence Radiation Laboratory.; U.S. Atomic Energy Commission.
Editora: Oak Ridge, Tenn. : U.S. Atomic Energy Commission, Technical Information Division, 1950.
Séries: UCRL (Series), 445.
Edição/Formato   Livro : Publicação de governo nacional : InglêsVer todas as edições e formatos
Base de Dados:WorldCat
Resumo:
At the spring, 1949, meeting of the National Academy of Sciences(l) a preliminary account was given of some observations of mesons produced by the 335 Mev x-ray beam from the Berkeley synchrotron. The present paper is a progress report of this work; no claim is made for completeness, but sufficient new data are available to make publication at this time worth while, especially since some of the numerical results  Ler mais...
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Formato Físico Adicional: Online version:
McMillan, Edwin M. (Edwin Mattison), 1907-
Production of mesons by x-rays.
Oak Ridge, Tenn. : U.S. Atomic Energy Commission, Technical Information Division, 1950
(OCoLC)852767000
Tipo de Material: Publicação do governo, Publicação de governo nacional
Tipo de Documento: Livro
Todos os Autores / Contribuintes: Edwin M McMillan; Jack M Peterson; R Stephen White; Lawrence Radiation Laboratory.; U.S. Atomic Energy Commission.
Número OCLC: 747836185
Notas: "AEC, Oak Ridge, Tenn., 3-21-50--400-A20352."
"UCRL-445."
"September 15, 1949"--P. 3.
Work performed at the University of California Radiation Laboratory.
Descrição: 15 p. : ill. ; 27 cm.
Título da Série: UCRL (Series), 445.
Outros Títulos: Technical Report Archive & Image Library (TRAIL)
Responsabilidade: by Edwin M. McMillan, Jack M. Peterson, R. Stephen White.

Resumo:

At the spring, 1949, meeting of the National Academy of Sciences(l) a preliminary account was given of some observations of mesons produced by the 335 Mev x-ray beam from the Berkeley synchrotron. The present paper is a progress report of this work; no claim is made for completeness, but sufficient new data are available to make publication at this time worth while, especially since some of the numerical results given in the earlier report require revision. The x-ray beam, produced by the impact of 335 Mev electrons on a 20 mil thick platinum target, has a width at half maximum of 0.0135 radian (about 1 inch at 6 feet from the target). In all but the earliest experiments the beam was further defined by a 1 inch hole in a lead block, then passed through a piece of carbon which served as the meson source. The x-ray intensity at one meter from the target was about 3500 r per hour (measured behind 1/8 inch of lead) under the best running conditions; the average was about half this. The actual exposures at the carbon meson source (6 feet from the target) ranged from 500 to 2000 r in the later runs. Mesons were recorded on Ilford nuclear plates; the highest density of meson endings observed was about 100 per square centimeter in a 100 micron emulsion. In the following sections the experimental conditions and some of the results are described in more detail.

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