The effect of annealing on the RHESSI gamma-ray detectors

Details The effect of annealing on the RHESSI gamma-ray detectors The effect of annealing on the RHESSI gamma-ray detectors

2009-12-19

arxiv.org/abs/0912.3919v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

2009 Fermi Symposium - to appear in eConf Proceedings C091122

Scientific paper

The performance of nine RHESSI germanium detectors has been gradually deteriorating since its launch in 2002 because of radiation damage caused by passing through the Earth's radiation belts. To restore its former sensitivity, the spectrometer underwent an annealing procedure in November 2007. It, however, changed the RHESSI response and affected gamma-ray burst measurements, e.g., the hardness ratios and the spectral capabilities bellow approximately 100 keV.

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