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The r-unit at 320 and 160 Mev

著者: Edwin M McMillan; Wade Blocker; Robert W Kenney; U.S. Atomic Energy Commission.; Lawrence Radiation Laboratory.
出版: Oak Ridge, Tenn. : U.S. Atomic Energy Commission, Technical Information Service, 1950.
シリーズ: UCRL (Series), 1004.
エディション/フォーマット:   書籍 : National government publication : Englishすべてのエディションとフォーマットを見る
データベース:WorldCat
概要:
The r-unit is used today in at least two different ways: as a measure of radiation dosage, and as a measure of x-ray intensity. The meaning of the former is fairly well defined in terms of energy absorbed per gram of tissue, and the standard thimble chambers are calibrated to read in these terms. The meaning of the latter is much less clear. As originally defined, the r-unit referred to the ionization in air due to  続きを読む
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その他のフォーマット: Online version:
McMillan, Edwin M. (Edwin Mattison), 1907-
R-unit at 320 and 160 Mev.
Oak Ridge, Tenn. : U.S. Atomic Energy Commission, Technical Information Service, 1950
(OCoLC)852767089
資料の種類: Government publication, National government publication
ドキュメントの種類: 図書
すべての著者/寄与者: Edwin M McMillan; Wade Blocker; Robert W Kenney; U.S. Atomic Energy Commission.; Lawrence Radiation Laboratory.
OCLC No.: 796815662
注記: "November 10, 1950."
Work performed at the Radiation Laboratory, University of California.
物理形態: 5 p. ; 28 cm.
シリーズタイトル: UCRL (Series), 1004.
その他のタイトル: Technical Report Archive & Image Library (TRAIL)
責任者: By Edwin M. McMillan, Wade Blocker [and] Robert W. Kenney/

概要:

The r-unit is used today in at least two different ways: as a measure of radiation dosage, and as a measure of x-ray intensity. The meaning of the former is fairly well defined in terms of energy absorbed per gram of tissue, and the standard thimble chambers are calibrated to read in these terms. The meaning of the latter is much less clear. As originally defined, the r-unit referred to the ionization in air due to secondary electrons in equilibrium with the primary beam of x-rays. With low-energy x-rays equilibrium is easily attained since the range of the secondaries is small compared with the absorption distance of the primaries in air, but with high-energy-x-rays this is no longer true. Since a clearly defined equilibrium no longer exists, the old definition must be abandoned and the question remains: what should the r-unit mean in connection with the intensity of a beam of high-energy x-rays?

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