Gamma-ray line astrophysics

Diehl, Roland
April 2000
AIP Conference Proceedings;2000, Vol. 510 Issue 1, p13
Academic Journal
The Compton Observatory instruments have measured γ-ray lines from several individual sources and from the diffuse interstellar medium. At this late phase of CGRO’s mission, we review the astrophysical achievements by these observations of solar flare spectra, supernova lines from Co and [sup 44]Ti isotopes, 511 keV annihilation radiation from Galactic plane and bulge, and diffuse 1809 keV radioactivity emission in the Galaxy from [sup 26]Al. We briefly address other candidate lines from [sup 7]Be and [sup 22]Na nova radioactivities, and nuclear [sup 12]C and [sup 16]O de-excitation lines from Orion or the inner Galaxy. An astronomy with γ-ray lines has been established, the derived lessons suggest specific observations with the INTEGRAL observatory and other experiments of the future. © 2000 American Institute of Physics.


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