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https://hdl.handle.net/10316/4473
Título: | Energy non-linearity effects in argon gaseous detectors in the region of the Ar K-absorption edge: experimental results | Autor: | Monteiro, C. M. B. Simões, P. C. P. S. Veloso, J. F. C. A. Santos, J. M. F. dos Conde, C. A. N. |
Palavras-chave: | X-ray detectors; Non-linearity | Data: | 2003 | Citação: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 505:1-2 (2003) 233-237 | Resumo: | The response of an argon proportional counter to X-rays with energy in the range of 1.5-8 keV was investigated. The response to full-energy absorption events was found to follow different trends for X-ray energies below and above the argon K-absorption edge presenting a discontinuity at this energy. An abrupt decrease of (2.2±0.3)% in the detector amplitude at the K-edge (3.203 keV) was measured, corresponding to a region within±(70±10) eV around the edge where the X-ray energy cannot be obtained unambiguously. This discontinuity corresponds to an abrupt increase of about 0.5 eV in the argon w-value and results in a sudden increase in the energy resolution from about 17% to about 19%. The detector response to escape peak events follows a linear trend over the entire energy range, very close to the response for full-energy absorption of X-rays with energies above the K-edge. | URI: | https://hdl.handle.net/10316/4473 | DOI: | 10.1016/S0168-9002(03)01059-3 | Direitos: | openAccess |
Aparece nas coleções: | FCTUC Física - Artigos em Revistas Internacionais |
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file99dbb50aa7dc481ab5e6b0b75457aa47.pdf | 121.51 kB | Adobe PDF | Ver/Abrir |
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