Temperature effect for coherent creation of electron-positron pairs in a crystal by high-energy photons

Yu P. Kunashenko, Yu L. Pivovarov

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The influence of a temperature of a crystal on coherent photoproduction of type B of e+e- pairs has been studied in details. In the case of detection of free pairs emitted into a given collimator size, the coherent maxima become more large and more bright following decrease of a temperature. Other temperature effect is connected with a capture of created particle to a channeled state in a crystal and can lead to a shift of position and change of the shape of coherent maxima. In the case of creation of a bound pair - positronium atom, the most sensitive to a temperature change are the angular distributions of created positronium atoms.

Original languageEnglish
Pages (from-to)106-112
Number of pages7
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume145
Issue number1-2
DOIs
Publication statusPublished - 2 Oct 1998

Fingerprint

electron-positron pairs
Positrons
Thermal effects
temperature effects
Photons
positronium
Crystals
Electrons
photons
crystals
Atoms
Angular distribution
collimators
photoproduction
Temperature
temperature
atoms
energy
angular distribution
shift

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

Cite this

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AU - Pivovarov, Yu L.

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N2 - The influence of a temperature of a crystal on coherent photoproduction of type B of e+e- pairs has been studied in details. In the case of detection of free pairs emitted into a given collimator size, the coherent maxima become more large and more bright following decrease of a temperature. Other temperature effect is connected with a capture of created particle to a channeled state in a crystal and can lead to a shift of position and change of the shape of coherent maxima. In the case of creation of a bound pair - positronium atom, the most sensitive to a temperature change are the angular distributions of created positronium atoms.

AB - The influence of a temperature of a crystal on coherent photoproduction of type B of e+e- pairs has been studied in details. In the case of detection of free pairs emitted into a given collimator size, the coherent maxima become more large and more bright following decrease of a temperature. Other temperature effect is connected with a capture of created particle to a channeled state in a crystal and can lead to a shift of position and change of the shape of coherent maxima. In the case of creation of a bound pair - positronium atom, the most sensitive to a temperature change are the angular distributions of created positronium atoms.

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