This study utilized standard two-source Co60 and Sr90 to determine the dead time and randomness of nuclear disintegration of a Geiger Muller (GM) tube. The experimental result obtained from this research was 22 ms dead time of a GM counter (τ). In order to understand random nuclear disintegration, the value of the standard deviation residual (σresidual), which represents the experimental mean square deviation, was determined for the radiation activity of the Co60 source to be 15, which was then compared with the theoretically expected standard deviation (σexpected) of 15.71. These values indicate a correlation between the two values with a relative standard deviation (RSD) error of 5%. The value of the standard error residual (δresidual) was also estimated to be 3.35, and compared with the expected standard error value (δexpected) of 3.51. The values were consistent with a relative standard deviation error of 5%, and the errors can be attributed to the random nature of nuclear decay.

Geiger Muller, Dead Time, Standard deviation, Standard error, Radiation.