Other
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982ipesprept.....j&link_type=abstract
M.S. Thesis Instituto de Pesquisas Espaciais, Sao Jose dos Campos (Brazil).
Other
Annihilation Reactions, Flux Density, Galactic Radiation, Gamma Ray Spectra, Line Spectra, Balloon-Borne Instruments, Continuous Spectra, Galactic Nuclei, Luminosity, Positrons
Scientific paper
Measurements of the annihilation line flux intensity at 0.511 MeV, obtained with a balloon borne experiment to measure gamma rays in the energy interval 0.3 to 3 MeV are presented. The detector looked at the galactic disk in the longitude interval -31 deg (1II) -41 deg and observed a flux intensity of (6.70 + or - 0.85) x .001 photons cm/2/s, which is in good agreement with the flux value estimated assuming that the Galactic Center is a line source emitting uniformly. Some likely sources of positrons and annhilation regions are also discussed. The results for the continuum spectrum emitted from the Galactic Center in the energy interval 0.3 to 0.67 MeV are presented and compared with measurements made by other authors.
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