Determination of the dead time of the TCS-172 gamma survey meter using the two source method

Abstract

Dead time is one of several major parameters of a nuclear radiation measurement system. To estimate the dead time and its uncertainty for the TCS-172 gamma survey meter at the Training Center of the Nuclear Research Institute, 240 count rate measurements were carried out using the two-source method with the non-paralyzable model and two standard radioactive sources, Cs-137 and Co-60. The results indicate that the dead time for this instrument was found to be 11.29 µs, with an uncertainty of ± 1.6 µs. These values show strong agreement with those found in the textbook and several articles.