Background in X-ray astronomy proportional counters

Details Background in X-ray astronomy proportional counters Background in X-ray astronomy proportional counters

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991itns...38..585b&link_type=abstract

(1990 Nuclear Science Symposium, Arlington, VA, Oct. 23-26, 1990, Proceedings. A91-42475 17-35) IEEE Transactions on Nuclear Sci

Astronomy and Astrophysics

Astronomy

3

Background Radiation, Proportional Counters, X Ray Astronomy, Compton Effect, Monte Carlo Method, Radiation Detectors, X Ray Fluorescence, Xenon

Scientific paper

The authors report the results of an investigation into the nature of background events in proportional counters sensitive to X-ray photons having energy of less than 150 keV. Even with the use of thick shields composed of high-atomic-number material, a significant flux background in the detector's energy region can result from multiple Compton scattering in the mass surrounding the active region of the detector. The importance of the selection of detector components in the reduction of the background by more than an order of magnitude is emphasized. Experimental results are shown to agree qualitatively with Monte Carlo simulations. It is concluded that escape gating is a powerful means of determining the nature of background in flight detectors: the single/pair ratios reveal whether the detected events are charged particles or photons.

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