Pressure effect in the X-ray intrinsic position resolution in noble   gases and mixtures
  A study of the gas pressure effect in the position resolution of an interacting X- or gamma-ray photon in a gas medium is performed. The intrinsic position resolution for pure noble gases (Argon and Xenon) and their mixtures with CO2 and CH4 were calculated for several gas pressures (1-10bar) and for photon energies between 5.4 and 60.0 keV, being possible to establish a linear match between the intrinsic position resolution and the inverse of the gas pressure in that energy range. In order to evaluate the quality of the method here described, a comparison between the available experimental data and the calculated one in this work, is done and discussed. In the majority of the cases, a strong agreement is observed. 
C. D. R. Azevedo, P. M. Correia, D. Gonzalez-Diaz, S. Biagi, A. L. M.   Silva, L.F.N.D. Carramate and J. F. C. A. Veloso
physics.ins-det physics.atom-ph