Abstract
The gas amplification factors (gas gains) for BF3, 3 He þ Kr, 3 He þ Ar þ CO2 and 3 He þ CF4 filled neutron proportional counters in cylindrical geometry, as a function of the applied potential, are experimentally determined. The data obtained are analysed using the Diethorn and Bateman expressions and values for gas constants DV, K, W and l calculated. The variation of W and l with gas pressure is also studied.
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