Counting Losses of Long Beaded Counters for X-Ray Measurements

抄録

It has been verified experimentally that a Geiger-Müller counter having several glass beads on its central wire is very useful in X-ray measurement because of its law counting losses (Reference (1)).
The connting losses of such beaded counters were calculated theoretically in several cases. The losses are reduced to about 1/n of non-beaded counters in the eases of short wave lengths, n being the number of sections, and this factor increases with the wave length of X-rays. The effects of the finite ranges of secondary electrons in the counter gas is negligibly small, and the effect of the finite spreading probability of counter discharges beyond the beads is to increase slightly the reducing factor.