Astronomy and Astrophysics – Astronomy
Scientific paper
May 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979stin...7928076d&link_type=abstract
Presented at 30th Meeting of Sociedade Brasileira para o Progresso da Ciencia
Astronomy and Astrophysics
Astronomy
Background Radiation, Balloon-Borne Instruments, Gamma Ray Astronomy, High Resolution, Brazil, Gamma Ray Spectra, Germanium, Magnetic Rigidity, Semiconductor Devices
Scientific paper
The existence of a background gamma-radiation at balloon heights is very inconvenient for the development of gamma-ray astronomy. Gamma-ray spectra measured during four recent balloon flights in Brazil with a large Ge(Li) high energy resolution gamma-ray spectrometer were analysed to study the local low-energy gamma-ray background. The results show that the local background contains contributions from gamma-rays produced in the earth's atmosphere, and also from gamma-ray induced in the detector and in its surrounding materials. The contribution of induced gamma-rays depends on the intensity of protons and neutrons at balloon heights. Comparison of results with previous results obtained by other authors at different latitudes shows a weaker background at 12 GV cut-off magnetic rigidity.
Albernhe Francis
Boclet Daniel
Claisse J.
Dacosta J. M.
Durouchoux Ph.
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