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The r-unit at 320 and 160 Mev

저자: Edwin M McMillan; Wade Blocker; Robert W Kenney; U.S. Atomic Energy Commission.; Lawrence Radiation Laboratory.
출판사: Oak Ridge, Tenn. : U.S. Atomic Energy Commission, Technical Information Service, 1950.
시리즈: UCRL (Series), 1004.
판/형식:   도서 : 국가 정부 간행물 : 영어모든 판과 형식 보기
데이터베이스:WorldCat
요약:
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  더 읽기…
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추가적인 물리적 형식: 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
자료 유형: 정부 간행물, 국가 정부 간행물
문서 형식:
모든 저자 / 참여자: Edwin M McMillan; Wade Blocker; Robert W Kenney; U.S. Atomic Energy Commission.; Lawrence Radiation Laboratory.
OCLC 번호: 796815662
메모: "November 10, 1950."
Work performed at the Radiation Laboratory, University of California.
설명: 5 p. ; 28 cm.
일련 제목: UCRL (Series), 1004.
다른 제목 Technical Report Archive & Image Library (TRAIL)
책임: By Edwin M. McMillan, Wade Blocker [and] Robert W. Kenney/

초록:

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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