Technical observations on low energy gamma ray astronomy

Details Technical observations on low energy gamma ray astronomy Technical observations on low energy gamma ray astronomy

Feb 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982stin...8233292d&link_type=abstract

Presented at the First School of Advanced Astrophys., Sao Paulo, Brazil, 12-13 Jun. 1981

Astronomy and Astrophysics

Astronomy

Cosmic Rays, Energy Spectra, Gamma Ray Astronomy, Gamma Ray Telescopes, Germanium Diodes, Photon-Electron Interaction, Scintillation Counters

Scientific paper

The detection of gamma rays of cosmic origin is very difficult. The principal problems involved are: (1) the weak intensities of the gamma ray fluxes, (2) the 'local' and instrumental photon backgrounds, and (3) the nonexistence of a telescope which can detect gamma rays directly - the detection methods always involve the interaction of gamma ray photons and secondary electrons with matter. The observational techniques used in gamma ray astronomy are dependent on the energy range of the gamma rays to be detected. The most common telescopes of low energy gamma ray astronomy (50 KeV - 20 MeV) use NaI(Tl) scintillators, or germanium diodes, as principal detectors, surrounded by an active shield (anticoincidence) of organic or inorganic scintillators.

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