Understanding Neutron Radiography Post Exam Reading VIII-Part 2a of 2A

Resolving Time
As an ionizing event occurs in the counter, the avalanche of ions paralyzes
the counter. The counter is then incapable of responding to another event
until the discharge dissipates and proper potential is established.
The time it takes to reestablish the electric field intensity is referred to as the
resolving time.
Average resolving time for a geiger-müller counter is about 100 ms, which
must be corrected at high level readings. Resolving time τ of a counter may
be determined by counting two sources independently (R 1 and R 2 ), then
together (R 1 , R 2 ). The background count is R b .
Charlie Chong/ Fion Zhang