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Energy resolution of xenon proportional counters: Monte Carlo simulation and experimental results

Journal Article · · IEEE Transactions on Nuclear Science
DOI:https://doi.org/10.1109/23.531788· OSTI ID:376044
; ; ;  [1];  [2]
  1. Univ. de Coimbra (Portugal). Dept. de Fisica
  2. York Univ., Toronto, Ontario (Canada). Dept. of Physics and Astronomy
+ Show Author Affiliations
The gas multiplication factor M and energy resolution R of xenon gas cylindrical proportional counters are investigated experimentally and calculated theoretically using a Monte Carlo technique to simulate the growth of single-electron-initiated avalanches. A good agreement is found between calculated and experimental data. The experimental and the calculated results are presented as a function of the reduced voltage K and the reduced anode radius Na, where N is the number density and a the anode radius. The Monte Carlo results for the intrinsic energy resolution R{sub int} are discussed in terms of the parameter f which characterizes the statistical fluctuations of the avalanche gains. The present calculations have revealed that there is an intrinsic dependence of f on the critical value S{sub c} of the reduced electric field at the onset of multiplication. This has enabled the parameterization of f and of the intrinsic energy resolution R{sub int} in terms of the reduced voltage K only and has explained why, for a given range of operating values for M, energy resolution in a cylindrical proportional counter is improved for thinner anode wires and lower pressures.
OSTI ID:
376044
Journal Information:
IEEE Transactions on Nuclear Science, Journal Name: IEEE Transactions on Nuclear Science Journal Issue: 4Pt2 Vol. 43; ISSN 0018-9499; ISSN IETNAE
Country of Publication:
United States
Language:
English

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Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
ELECTRIC POTENTIAL
ENERGY RESOLUTION
EXPERIMENTAL DATA
MONTE CARLO METHOD
PROPORTIONAL COUNTERS
THEORETICAL DATA