Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aipc..410.1535t&link_type=abstract
The fourth compton symposium. AIP Conference Proceedings, Volume 410, pp. 1535-1543 (1997).
Astronomy and Astrophysics
Astrophysics
1
X- And Gamma-Ray Telescopes And Instrumentation, Spectroscopy And Spectrophotometry, X-Ray And Gamma-Ray Spectrometers
Scientific paper
SPI (Spectrometer for INTEGRAL) is a high spectral resolution gamma-ray telescope using cooled germanium detectors that will be flown on board the INTEGRAL mission in 2001. It consists of an array of 19 closely-packed germanium detectors surrounded by an active bismuth germanate (BGO) anti-coincidence shield. The instrument operates over the energy range 20 keV to 8 MeV with an energy resolution of 1-5 keV. A tungsten coded-aperture mask located 1.7 m from the detector array provides imaging over a 15° fully-coded field-of-view with an angular resolution of ~3°. The point source narrow-line sensitivity is estimated to be 3-7×10-6 ph cm-2 s-1 over most of the range of the instrument (E>200 keV) for a 106 s observation. With its combination of high sensitivity, high spectral resolution and imaging, SPI will improve significantly over the performance of previous instruments such as HEAO-3, OSSE, and Comptel. It can be expected to take a major step forward in experimental studies in nuclear astrophysics. The SPI instrument is being developed under the auspices of the European Space Agency by a large international team of scientists and engineers in both Europe and the United States.
Albernhe Francis
Borrel Vincent
Caraveo Patrizia
Connell Paul
Cordier Bertand
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