Bremsstrahlung and pair creation: Suppression mechanisms and how they affect EHE air showers

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Most calculations of air shower development have been based on the Bethe-Heitler cross sections for bremsstrahlung and pair production. However, for energetic enough particles, a number of different external factors can reduce these cross sections drastically, slowing shower development and lengthening the showers. Four mechanisms that can suppress bremsstrahlung and pair production cross sections are discussed, and their effect on extremely high energy air showers considered. Besides lengthening the showers, these mechanisms greatly increase the importance of fluctuations in shower development, and can increase the angular spreading of showers.

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Klein, S.R. December 1, 1997.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by the UNT Libraries Government Documents Department to the UNT Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 12 times. More information about this article can be viewed below.

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Most calculations of air shower development have been based on the Bethe-Heitler cross sections for bremsstrahlung and pair production. However, for energetic enough particles, a number of different external factors can reduce these cross sections drastically, slowing shower development and lengthening the showers. Four mechanisms that can suppress bremsstrahlung and pair production cross sections are discussed, and their effect on extremely high energy air showers considered. Besides lengthening the showers, these mechanisms greatly increase the importance of fluctuations in shower development, and can increase the angular spreading of showers.

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20 p.

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OSTI as DE98052318

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  • Workshop on observing giant cosmic ray air showers from >10{sup 20} eV particles from space, College Park, MD (United States), 13-15 Nov 1997

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  • Other: DE98052318
  • Report No.: LBNL--41167
  • Report No.: CONF-9711122--
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 650343
  • Archival Resource Key: ark:/67531/metadc705716

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  • December 1, 1997

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 5, 2016, 1:12 p.m.

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Klein, S.R. Bremsstrahlung and pair creation: Suppression mechanisms and how they affect EHE air showers, article, December 1, 1997; California. (https://digital.library.unt.edu/ark:/67531/metadc705716/: accessed May 30, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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