Gamma Ray Imaging Spectrometer (GRIS)
A balloon-borne instrument which uses germanium detectors for high resolution gamma-ray spectroscopy.
A balloon-borne instrument which uses germanium detectors for high resolution gamma-ray spectroscopy.
GRIS has been an extraordinarily successful balloon-borne instrument which uses germanium detectors for high resolution gamma-ray spectroscopy. The maiden flights of GRIS from Alice Springs, Australia in 1988 produced the definitive measurements of gamma-ray lines from Supernova 1987A and the positron annihilation line at 511 keV from the Galactic Center. These extremely important lines were resolved, yielding crucial new clues about the emission processes.
Source: NASA
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