High-efficiency hard x-ray xenon gas proportional scintillation counter

Luis M. N. Tavora; Joaquim M. F. dos Santos; Carlos Alberto Na Conde

doi:10.1117/12.186806

16 September 1994 High-efficiency hard x-ray xenon gas proportional scintillation counter

Luis M. N. Tavora, Joaquim M. F. dos Santos, Carlos Alberto Na Conde

Proceedings Volume 2280, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V; (1994) https://doi.org/10.1117/12.186806
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

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.

Citation Download Citation

Luis M. N. Tavora, Joaquim M. F. dos Santos, and Carlos Alberto Na Conde "High-efficiency hard x-ray xenon gas proportional scintillation counter", Proc. SPIE 2280, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy V, (16 September 1994); https://doi.org/10.1117/12.186806

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