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Performance of the ASTRO-E hard X-ray detector

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36 Author(s)
Tashiro, M. ; Dept. of Phys., Saitaina Univ., Saitama, Japan ; Kamae, T. ; Makishima, K. ; Takahashi, T.
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This paper summarizes the design and performance of the hard X-ray detector constructed for the ASTRO-E satellite. The detector utilizes the GSO/BGO well-type phoswich counters in a compound-eye configuration to achieve an extremely low background level of a few × 10-5 counts s-1 cm-2 keV-1. The GSO scintillators installed in the BGO active shield wells are sensitive to 30-600 keV photons, while the 2-mm-thick silicon PIN diodes, placed in front of each GSO crystal, cover the 10-60 keV energy band with a spectral resolution of ∼3.5-keV full-width at half-maximum. The design goals, of both low background and high energy resolution, in the hard X-ray bands were verified through the preflight calibration experiments.

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Nuclear Science, IEEE Transactions on  (Volume:49 ,  Issue: 4 )