Energy loss of pions and electrons of 1 to 6 GeV/c in drift chambers operated with Xe,CO2(15%)

Details Energy loss of pions and electrons of 1 to 6 GeV/c in drift chambers operated with Xe,CO2(15%) Energy loss of pions and electrons of 1 to 6 GeV/c in drift chambers operated with Xe,CO2(15%)

2003-10-24

arxiv.org/abs/physics/0310122v1

Nucl.Instrum.Meth. A519 (2004) 508-517

Physics

Instrumentation and Detectors

15 pages, 10 figures, accepted for publication in Nucl.Instrum.Meth. A

Scientific paper

10.1016/j.nima.2003.11.036

We present measurements of the energy loss of pions and electrons in drift chambers operated with a Xe,CO2(15%) mixture. The measurements are carried out for particle momenta from 1 to 6 GeV/c using prototype drift chambers for the ALICE TRD. Microscopic calculations are performed using input parameters calculated with GEANT3. These calculations reproduce well the measured average and most probable values for pions, but a higher Fermi plateau is required in order to reproduce our electron data. The widths of the measured distributions are smaller for data compared to the calculations. The electron/pion identification performance using the energy loss is also presented.

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