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Production of mesons by x-rays

Author: Edwin M McMillan; Jack M Peterson; R Stephen White; Lawrence Radiation Laboratory.; U.S. Atomic Energy Commission.
Publisher: Oak Ridge, Tenn. : U.S. Atomic Energy Commission, Technical Information Division, 1950.
Series: UCRL (Series), 445.
Edition/Format:   Book : National government publication : EnglishView all editions and formats
Database:WorldCat
Summary:
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  Read more...
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Additional Physical Format: 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
Material Type: Government publication, National government publication
Document Type: Book
All Authors / Contributors: Edwin M McMillan; Jack M Peterson; R Stephen White; Lawrence Radiation Laboratory.; U.S. Atomic Energy Commission.
OCLC Number: 747836185
Notes: "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.
Description: 15 p. : ill. ; 27 cm.
Series Title: UCRL (Series), 445.
Other Titles: Technical Report Archive & Image Library (TRAIL)
Responsibility: by Edwin M. McMillan, Jack M. Peterson, R. Stephen White.

Abstract:

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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