Detection of 511 keV positron annihilation radiation from the galactic center direction

Details Detection of 511 keV positron annihilation radiation from the galactic center direction Detection of 511 keV positron annihilation radiation from the galactic center direction

Oct 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...225l..11l&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 225, Oct. 1, 1978, p. L11-L14. ERDA-supported research.

Computer Science

Sound

192

Balloon Sounding, Galactic Radiation, Gamma Ray Astronomy, Milky Way Galaxy, Positron Annihilation, Balloon-Borne Instruments, Energy Spectra, Telescopes

Scientific paper

A balloon-borne germanium gamma-ray telescope was flown over Alice Springs, Australia, in an attempt to detect spectral features from the galactic-center (GC) direction. A 511-keV positron annihilation line was detected at a flux level of 0.00122 + or - 0.00022 photon/s per sq cm. Suggestive evidence for the detection of the three-photon positronium continuum is presented. A brief discussion of the possible origin of the positrons is given.

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