Physics
Scientific paper
Feb 1960
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1960natur.185..369c&link_type=abstract
Nature, Volume 185, Issue 4710, pp. 369 (1960).
Physics
3
Scientific paper
WE have investigated the characteristics of Geiger-Müller counters containing mixtures of argon with small quantities of xenon (0-7 per cent), oxygen (0-0.5 per cent) and nitrogen (~ 1 per cent), to total pressures of 700 mm. mercury. That counters filled with this mixture would behave as `fast' counters in a manner similar to organically quenched counters was first reported by Shore1, although Riedel2 reported that using the filling recommended by Shore produced no Geiger region. Using counters of the conventional `gamma' type, glass bodies with cylindrical cathodes of various materials together with a 4.7 megohm series resistor and a linear amplifier of a gain of about 25, we find that optimum proportions of the gas mixture to produce the best plateaux are : xenon (3.5 per cent), oxygen (0.3 per cent), nitrogen (1.2 per cent), with argon added to give a total pressure of 700 mm. mercury. Such a mixture gave a plateau about 170 V. in length, with a starting voltage of 1,460 V. and a plateau slope of 0.02 per cent/V.
Collinson J. L. A.
Demetsopoullos I. C.
Dennis A. J.
Zarzycki J. M.
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