Abstract
The calculated position resolutions for X-ray photons (1–60 keV) in pure noble gases at atmospheric pressure are presented. In this work we show the influence of the atomic shells and the detector dimensions on the intrinsic position resolution of the used noble gas. The calculated results were obtained by using a new software tool, Degrad, and compared to the available experimental data.
Highlights
Since the invention of the Multi-Wire Proportional Chamber (MWPC) by G
Charpack in 1968, noble gases have been exhaustively used as a radiation detection medium
The position resolutions here presented were calculated for different gases as function of the X-ray photon energy by using a simulation program based on Monte Carlo simulation: Degrad [9]
Summary
Since the invention of the Multi-Wire Proportional Chamber (MWPC) by G. In gaseous detectors the interaction position of the incoming photons is usually obtained through the centre-of-gravity of the produced spatial charge distribution, the atom de-excitation processes like Auger emission, Coster– Kronig or Shake-off, will govern the charge spread process over the photoelectron range. Another process that can contribute to the position resolution degradation is the fluorescence photon interaction within the detector volume. At low energies elastic Rayleigh scattering of the fluorescence photon can contribute to the resolution and is accounted for in the simulation
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