Gamma-Ray Limits on Galactic (60) Fe Nucleosynthesis from the GRIS Balloon Instrument

Details Gamma-Ray Limits on Galactic (60) Fe Nucleosynthesis from the GRIS Balloon Instrument Gamma-Ray Limits on Galactic (60) Fe Nucleosynthesis from the GRIS Balloon Instrument

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...189.9302n&link_type=abstract

American Astronomical Society, 189th AAS Meeting, #93.02; Bulletin of the American Astronomical Society, Vol. 28, p.1396

Astronomy and Astrophysics

Astronomy

Scientific paper

The Gamma Ray Imaging Spectrometer (GRIS) recently observed the gamma-ray emission from the Galactic center region. We searched for the diffuse gamma-ray line emissions at 1173 keV and 1332 keV as expected from the decay chain of the nucleosynthetic (60) Fe. We do not find any evidence for such radiations. We derive 2-sigma upper limits for the Galactic emission in the lines assuming different source distributions. These limits are lower than those reported by previous observations performed at high energy resolution. This allows us to constrain the yield of (60) Fe in Galactic chemical evolution models.

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