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Author : C. S. Cook
Publisher : Unknown
Page : 30 pages
File Size : 50,9 Mb
Release : 1958
Category : Collimators (Optical instrument)
ISBN : UOM:39015095218098
Author : Herbert Goldstein,J. Ernest Wilkins
Publisher : Unknown
Page : 218 pages
File Size : 53,6 Mb
Release : 1954
Category : Gamma ray spectrometry
ISBN : UOM:39015001312746
Author : M. H. Hull
Publisher : Unknown
Page : 32 pages
File Size : 48,9 Mb
Release : 1946
Category : Gamma rays
ISBN : UOM:39015095101815
Author : Herbert Steinberg
Publisher : Unknown
Page : 202 pages
File Size : 44,8 Mb
Release : 1960
Category : Gamma rays
ISBN : CORNELL:31924095849075
Author : W. F. Titus
Publisher : Unknown
Page : 36 pages
File Size : 48,7 Mb
Release : 1958
Category : Blast effect
ISBN : UOM:39015095214857
Author : L. L. Foldy
Publisher : Unknown
Page : 12 pages
File Size : 45,9 Mb
Release : 1951
Category : Gamma rays
ISBN : UOM:39015095217843
Author : W. C. Roesch
Publisher : Unknown
Page : 60 pages
File Size : 51,9 Mb
Release : 1956
Category : Beta rays
ISBN : UOM:39015077316886
Author : John M. Ruddy
Publisher : Unknown
Page : 28 pages
File Size : 41,7 Mb
Release : 1951
Category : Gamma rays
ISBN : UOM:39015086438994
Author : R. L. Mather
Publisher : Unknown
Page : 46 pages
File Size : 41,8 Mb
Release : 1957
Category : Collimators (Optical instrument)
ISBN : UOM:39015095163401
Expressions are developed which give the amount of unidirectional radiation from a distant radiation source passing through a cylindrical hole in a slab of material, including the amount of radiation which penetrates the edges of the hole, as a function of angle between the radiation direction and the axis of the hole. The modifications necessary for sources at finite distances are indicated. These functions are integrated over appropriate angles for distant line sources and for extended sources. It is shown that, to a first approximation, the results are the same as the geometrical aperture for a like diameter hole in a similar slab with one mean free path of material removed from each side. The effects due to scattering from the walls of the collimator are discussed and an approximate method of calculation is presented with results for a specific collimator.
Author : Herbert Goldstein
Publisher : Unknown
Page : 324 pages
File Size : 43,9 Mb
Release : 1957
Category : Gamma rays
ISBN : UCAL:B3375449
Author : Herbert Goldstein
Publisher : Unknown
Page : 12 pages
File Size : 49,8 Mb
Release : 1954
Category : Annihilation reactions
ISBN : UOM:39015095017706
Author : Edoardo Amaldi,U. Fano,L. V. Spencer,M. J. Berger
Publisher : Springer Science & Business Media
Page : 874 pages
File Size : 42,9 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783642459207
661 tures, such as occurs in stellar atmospheres and in thermonuc1ear processes, will not be considered 1. Because photoelectric absorption predominates completely at low photon energies, and penetration theory is elementary under these conditions, attention is directed in this artic1e to photon energies above ""20 kev. On the high energy side, this artic1e does not cover the cascade shower processes which are dealt 2 with in cosmic ray studies • In this connection it is recalled that the cascade shower process, which involves electrons and positrons besides X rays, becomes predominant above 10 Mev in heavy elements, and above 100 Mev in light ones. Theories developed for the study of cascade showers in cosmic rays rely on assumptions about the prob ability of interactions with matter which are adequate only at energies of the order of 1 Gev or more. Below this energy there is a gap in which penetration phenomena are qualitatively known and understood but have not yet been calculated in detail. A few detailed experimental studies which have been made at energies up to 300 Mev will be reviewed in this article.
Author : Herbert Goldstein
Publisher : Unknown
Page : 440 pages
File Size : 43,8 Mb
Release : 1971
Category : Gamma rays
ISBN : UOM:39015004511492
Author : L. Pullman
Publisher : Unknown
Page : 216 pages
File Size : 46,8 Mb
Release : 1956
Category : Gamma rays
ISBN : UOM:39015095284637
Author : John Howard Hubbell,Lewis Van Clief Spencer
Publisher : Unknown
Page : 48 pages
File Size : 55,7 Mb
Release : 1964
Category : Radioactive fallout
ISBN : UOM:39015001554305
