Experimental and theoretical features of hard-collimated type-B coherent high energy pair production

I. Endo, Y. Okazaki, Yu P. Kunashenko, Yu L. Pivovarov

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1 Citation (Scopus)

Abstract

We have reexamined the conditions for the enhancement of electron-positron pair photoproduction cross-section to occur due to the type-B coherent effect. Simple formulae to characterize the position and the bandwidth of the enhancement for the hard collimated pairs are derived. We also examined the effect of interference among the atomic strings and found that, in some cases it is almost identical to a random phase approximation while in other cases, phenomena analogous to the extinction law in X-ray diffraction may occur.

Original languageEnglish
Pages (from-to)343-350
Number of pages8
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume179
Issue number3
DOIs
Publication statusPublished - 1 Aug 2001

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Positrons
pair production
Bandwidth
X ray diffraction
electron-positron pairs
Electrons
augmentation
photoproduction
extinction
strings
bandwidth
interference
energy
cross sections
approximation
diffraction
x rays

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

Cite this

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AU - Okazaki, Y.

AU - Kunashenko, Yu P.

AU - Pivovarov, Yu L.

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AB - We have reexamined the conditions for the enhancement of electron-positron pair photoproduction cross-section to occur due to the type-B coherent effect. Simple formulae to characterize the position and the bandwidth of the enhancement for the hard collimated pairs are derived. We also examined the effect of interference among the atomic strings and found that, in some cases it is almost identical to a random phase approximation while in other cases, phenomena analogous to the extinction law in X-ray diffraction may occur.

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