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A New Method for the Eliminaion of the Wall Effect in Proportional Counter

Published online by Cambridge University Press:  06 March 2019

K. Sipilä  and
E. Kiuru
K. Sipilä
Affiliation:
Outokumpu Oy, Institute of Physics Espoo, Finland
E. Kiuru
Affiliation:
Outokumpu Oy, Institute of Physics Espoo, Finland
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Abstract

The wall effect present in the gas-filled proportional counters and the low-energy background caused by it are well-known disadvantages. In this paper a method is presented to define the radial position of a single X-ray absorption in ordinary proportional counters. The method utilizes the variation in detector pulse collection times due to the electron diffusion. This variation can be determined with a specially constructed risetime analyzer which effectively forms a dead zone of cylindrical shape inside the detector. The properties and performance of the method are demonstrated. In the experiment performed the signal to background ratio was improved by a factor of twenty.

Type
X-Ray Instrumentation
Information
Advances in X-Ray Analysis , Volume 20: Twenty-Fifth Annual Conference on Applications of X-ray Analysis, August 4-6, 1976 , 1976 , pp. 555 - 563
Copyright
Copyright © International Centre for Diffraction Data 1976

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References

1. Kocharov, G. E. and Petrov, V. V., “Wall Effect in Cylindrical Detectors,” Kosm. Luchi, No. 10, 167–176 (1969), (in Russian).Google Scholar
2. Fink, R. W., Chap. 5 in B. Crasemann, Editor, Atomic Inner-Shell Processes, Vol. II, Academic Press (1975).Google Scholar
3. Mathieson, E. and Harris, T. J., “Pulse Shape Discrimination in Proportional Counters - Theory of Electronic System,” Nucl. Inst. Meth. 88, 181–192 (1970).Google Scholar
4. T. J. Harris and E. Mathieson, “Pulse Shape Discrimination in Proportional Counters - Experimental Results with an Optimised Electronic System,” Nucl. Inst. Meth. 96, 397-403 (1971).Google Scholar
5. Brown, D. B., “Electron Range and Electron Stopping Power,” in J. W. Robinson, Editor, Handbook of Spectroscopy, Vol. I, p. 249, CRC Press (1974).Google Scholar
6. English, W. N. and Hanna, G. C., “Grid Ionization Chamber Measurements of Electron Drift velocities in Gas Mixtures,” Canadian J. Phys. 31, 768–797 (1953).Google Scholar
7. Lewyn, L . L., “Pulse Shape Discrimination for X-Ray Proportional Counter Background Reduction,” Nucl. Inst. Meth. 82, 138–140 (1970).Google Scholar
8. Gorenstein, P. and Mickiewicz, S., “Reduction of Cosmic Background in X-Ray Proportional Counter through Risetime Discrimination,” Rev. Sci. Instr. 39, 816–820 (1968).Google Scholar
9. Isozumi, Y. and Isozumi, S., “A Pulse Shape Discrimination for an X-Ray Proportional Counter and its Application to a Coincidence Experiment,” Nucl. Inst. Meth. 96, 317–323 (1971).Google Scholar
10. Doi, K., “A Simple Risetime Discriminator for X-Ray Proportional Counter Background Reduction,” Nucl. Inst. Meth. 125, 183–187 (1975).Google Scholar