TRAN THI THAO NGUYEN, CHAU VAN TAO, NGUYEN MINH NHAT
Department of Nuclear Physics, Physics and Engineering Physics Faculty, University of Sciences – Vietnam National Unviersity – Ho Chi Minh
Abstract: In this work, we establish analytical expressions and design the software based on MATLAB software to evaluate dose rate at an interested point, which is caused by the condensed cylinder gamma sources such as 27Co60, 53I131, 55Cs137, 77Ir192, 18Ar41, 19K40, 29Cu64, 30Zn65… From this programe, dose rate without and with shielding especially concerning self-absorption correction in the source will be determined. Furthermore, the program allows us to simulate the equidose line – 2D and the equidose surface – 3D and to know dose rate at a certain position on graphic by clicking mouse at the interested point. Also, it is able to estimate the thickness of shielding material (concrete, ion, lead, etc…).
Keywords: dose rate, condensed cylinder gamma sources, self –absorption, equidose line