Question

Q3 List shielding materials adequate for protection from the following: a. alpha particles b. beta particles c. gamma rays E. Effect of Time on Radiation Level Time (min) 1. Counts 2. Average 3. Radiation from Background (cpm) Source (cpm) 7349 -35 7314 14904 -35(2)=-70 14834 35480 -35(3) = -105 | 35375 F. Effect of Distance on Radiation Level 1. Distance 2. Counts/min 3. Average (cm) Background (cpm) 100 77 -35 4. Radiation from Source (cpm) 55 42 117 365 330

Answer 1

shielding materials - Electromagnetic shielding is the process of lowering the electromagnetic field in an area by barricating it with conductive materials. y Alpha particles - i) barrels , 1 boards, in vehicals. in building gravel w lead, w This piece of pipes, ng Dead cells in the outer layer of human skin etc are aclequate shielding because alpha Pasticals can't penetrate J. Betu particles - Beta particles can stoped after traveling through about to feet of curs, less than 2 inches of water or a thin layer of glass of metal Also shielding need to be about 13.8 feet of water about 6.6 feet of concrete cind 13 feet of lead. c) Gamma rays- Thick dence shielding is necessary to protect against gamma rays. The higher the energy of the gamona says the thicker the shield must be.