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The r-unit at 320 and 160 Mev

ผู้แต่ง: Edwin M McMillan; Wade Blocker; Robert W Kenney; U.S. Atomic Energy Commission.; Lawrence Radiation Laboratory.
สำนักพิมพ์: Oak Ridge, Tenn. : U.S. Atomic Energy Commission, Technical Information Service, 1950.
ชุด: UCRL (Series), 1004.
ครั้งที่พิมพ์/รูปแบบ:   Print book : สิ่งพิมพ์รัฐบาลแห่งชาติ : ภาษาอังกฤษดูครั้งที่พิมพ์และรูปแบบ
ฐานข้อมูล:WorldCat
สรุป:
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  อ่านมากขึ้น…
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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
ขนิดวัสดุ: สิ่งพิมพ์รัฐบาล, สิ่งพิมพ์รัฐบาลแห่งชาติ
ประเภทของเอกสาร: หนังสือ
ผู้แต่งทั้งหมด : ผู้แต่งร่วม Edwin M McMillan; Wade Blocker; Robert W Kenney; U.S. Atomic Energy Commission.; Lawrence Radiation Laboratory.
OCLC Number: 796815662
หมายเหตุ: "November 10, 1950."
Work performed at the Radiation Laboratory, University of California.
คำอธิบาย: 5 pages ; 28 cm.
ชื่อชุด: UCRL (Series), 1004.
ชื่อเรื่องอื่น: Technical Report Archive & Image Library (TRAIL)
ความรับผิดชอบ: by Edwin M. McMillan, Wade Blocker [and] Robert W. Kenney.

บทคัดย่อ:

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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