A new G–M counter dead time model

A hybrid G–M counter dead time model was derived by combining the idealized paralyzable and non-paralyzable models. The new model involves two parameters, which are the paralyzable and non-paralyzable dead times. The dead times used in the model are very closely related to the physical dead time of the G–M tube and its resolving time. To check the validity of the model, the decaying source method with 56Mn was used. The corrected counting rates by the new G–M dead time model were compared with the observed counting rates obtained from the measurement and gave very good agreement within 5% up to 7 × 104 counts/s for a G–M tube with a dead time of about 300 μs.