The purpose of this experiment is to determine the
voltage plateau for the Geiger tube and to establish a
reasonable operating point for the tube. Fig. 2.2 shows a
counts-vs.-voltage curve for a typical Geiger tube that has
an operating point in the vicinity of 1000 V.
The region between R1 and R2, corresponding to
operating voltages V1 and V2, is called the Geiger region.
Voltages