Abstract
The various methods of dead-time reduction are investigated and discussed. The application of a large negative voltage pulse to the center wire, just after the discharge starts, reduces the dead-time. This effect is due to a combination of stopping the propagation of the ion sheath, ion neutralization, and ion multiplication. In the most favorable case found, the dead-time of a Geiger tube having a normal dead-time of 160 microseconds is reduced to 80 microseconds by this means. Increasing the gain of the detecting circuit without a negative pulse does not reduce the dead-time more than a factor of two, unless the counting rate is greatly increased so that all pulses are small. Operation with high gain just below the Geiger threshold shows efficiency of the order of 50 percent for beta-particles, and no measurable dead-time.
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