Shedding Light on the Dark Side of Low-Energy Gamma-Ray Astronomy

Details Shedding Light on the Dark Side of Low-Energy Gamma-Ray Astronomy Shedding Light on the Dark Side of Low-Energy Gamma-Ray Astronomy

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprn17116w&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

High instrumental backgrounds are a notorious problem for low-energy gamma-ray astronomy. We have combined the MGEANT and GGOD Monte Carlo codes in an attempt to model the high resolution, long-term gamma-ray data recorded by the Transient Gamma Ray Spectrometer (TGRS) on board WIND. The TGRS is a Ge spectrometer operating in the 40 keV to 8 MeV range. Its data reveal the complex instrumental background in formidable detail, particularly the many gamma-ray lines from radioactive isotopes produced in the detector and spacecraft materials by cosmic-ray interactions. We report the successes (and failures) of the MGEANT/GGOD codes in reproducing this "dark side" of TGRS.

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