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Table 1

Comparison of properties of the GBM NaIs with the BATSE SDs.


Material NaI NaI
Number 8 12
Area 126 cm2 126 cm2
Thickness 7.62 cm 1.27 cm
Energy range 30 keV–10 MeV* 8 keV–1 MeV
Spectral binning
8–20 keV 1 bin ~12



This energy range varied depending on the gain of the detectors where the lower end of the range could be as low as 5 keV for a high gain setting (Preece et al. 1996).

References. (1) Preece et al. (1996), (2) Meegan et al. (2009).

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