Interaction of multi-MeV gamma rays with matter

Details Interaction of multi-MeV gamma rays with matter Interaction of multi-MeV gamma rays with matter

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aipc..186..125c&link_type=abstract

IN: High-energy radiation background in space (A90-25305 09-93). New York, American Institute of Physics, 1989, p. 125-131. Rese

Physics

Gamma Rays, Germanium, High Energy Interactions, Pair Production, Bremsstrahlung, Compton Effect, Kinetic Energy, Monte Carlo Method, Photoelectric Effect

Scientific paper

The code BSIMUL is used to simulate the interaction of a 10.76-MeV gamma ray with a 5 cm x 6 cm germanium detector crystal. The Monte Carlo calculation includes the following interactions: the photoelectric effect, Compton scattering, pair-production, pair annihilation, and bremsstrahlung. The effect of the simplifying assumption that the electrons and positrons do not travel significant distances in the material is investigated. The simulation is compared to experiment by following the decay of the 12.54-MeV resonance produced by 992-keV protons on Al-27 in the reaction Al-27(p, gamma)Si-28. In 75 percent of the reactions this resonance decays by a 10.76-MeV gamma ray whose interactions with the detector dominate the spectrum in the energy region between 8 and 11 MeV.

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