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Proceedings Paper

High-efficiency hard x-ray xenon gas proportional scintillation counter
Author(s): Luis M. N. Tavora; Joaquim M. F. dos Santos; Carlos Alberto Na Conde
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Paper Abstract

A large-volume (3 liters), xenon-filled, gas proportional scintillation counter with a curved grid and focusing rings was developed and tested with hard X-rays. The efficiency at 60 keV was calculated to be 64%. The experimentally measured energy resolution was observed to decrease from 6 to 5% when the X-ray energy was increased from 22.1 to 59.6 keV. Spectra are presented for the 241Am gamma rays and lanthanum K(alpha ) and B(beta ) X-rays. Spectra for the same K lines of erbium, praseodymium and tin are also presented for the detector with and without the focusing rings. These spectra show that the focusing rings increase the detection efficiency and improve the energy resolution. This effect is attributed to the increased electron collection in the scintillation region, to faster pulse rise times and to reduced electron attachment to impurities.

Paper Details

Date Published: 16 September 1994
PDF: 7 pages
Proc. SPIE 2280, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V, (16 September 1994); doi: 10.1117/12.186806
Show Author Affiliations
Luis M. N. Tavora, Univ. of Coimbra (Portugal)
Joaquim M. F. dos Santos, Univ. of Coimbra (Portugal)
Carlos Alberto Na Conde, Univ. of Coimbra (Portugal)

Published in SPIE Proceedings Vol. 2280:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V
Oswald H. W. Siegmund; John V. Vallerga, Editor(s)

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