The background in a balloon-borne fluorescence-gated proportional counter

Details The background in a balloon-borne fluorescence-gated proportional counter The background in a balloon-borne fluorescence-gated proportional counter

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1344...82r&link_type=abstract

IN: EUV, X-ray, and Gamma-ray instrumentation for astronomy; Proceedings of the Meeting, San Diego, CA, July 11-13, 1990 (A92-20

Astronomy and Astrophysics

Astronomy

2

Background Radiation, Balloon-Borne Instruments, Fluorescence, Proportional Counters, X Ray Spectra, Computerized Simulation, Gamma Ray Spectra, Monte Carlo Method, Photoabsorption

Scientific paper

The results of an analysis of the background in a fluorescence-gated proportional counter operating over the energy range 3-150 keV are presented. It is found that the dominant background component is that produced by high energy qamma-rays that penetrate the shields and undergo multiple scattering in the detector body, resulting in photoelectric absorption in the detector gas. A careful choice of materials and thickness can move the peak of this emission outside of the detector sensitive range, thereby dramatically reducing the residual background.

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