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About possibility of measurement of single-photon spectra under condition of multiple photon generation

Authors
Journal
Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms
0168-583X
Publisher
Elsevier
Publication Date
Volume
173
Identifiers
DOI: 10.1016/s0168-583x(00)00297-4
Keywords
  • Multi-Gev Energy Electron And Photon
  • Thick Crystal Target
  • Gamma-Radiation Multiplicity
  • Gamma-Radiation Spectra Measurements
Disciplines
  • Physics

Abstract

Abstract In this work, the possibility of different techniques to measure real spectral-angular distributions of radiation under conditions of multiple photon generation is analyzed in dependence of experimental requirements. The technique based on Compton scattering, on narrow collimation of direct gamma-quanta beams, on pair magnetic spectrometer use and on measured opening angles of electron–positron pairs are examined. It is shown that for the measurement of photon spectral-angular distributions and photon multiplicity one can employ the narrow collimation technique. The real photon spectra within the limited emission angle may be measured with a pair magnetic spectrometer. An estimate of the multiplicity of the photons, which are registered by a total absorption spectrometer as one photon and the average energy of these photons may be obtained by measuring the opening angle of the electron–positron pairs generated by the photons in a thin converter.

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