Define the thickness of the air shield needed to reduce the

Last updated: 6/9/2023

Define the thickness of the air shield needed to reduce the intensity of monochromatic y radiation with the photon energy of 200 keV by a factor of 10 The linear attenuation coefficient for air at 200 keV is 0 016 m 1 Select one O 6 9 km O 20m O 53 m O 145 m