The average energy of a Cs-137 source is approximately:

Related MCQs

• The average energy of a T3-170 source is approximately:
• The average energy of a Ir-192 source is approximately:
• Approximately what energy X ray machine would be required to have penetrating power equivalent to a Cobalt-60 source:
• The radiation from 37 GBq (1 Ci) of Co-60 (0.145 Gy or 14.5R at 30.5 cm or 1 foot) is attenuated in air to approximately 5mR/h at a distance of approximately:
• A radiographic exposure with 3700 GBq (100 Ci) source of Ir-192 using source to film distance of 60 cm results in a radiation intensity of 0.12 Gy/h (11.8 R/h) and a radiographic density of 2.5. The intensity of radiation needed to obtain the same density when the source to film distance is changed to120 cm is:
• The threshold energy below which pair production cannot occur is approximately:
• The half value layer of lead for Co-60 is approximately 13 mm (0.5 in). If the radiation level on the source side of a 38 mm (1.5 in) lead plate is 0.64 Gy/h (64 R/h):, the radiation level on the opposite side is:
• Approximately how long would it take for a 370 GBq (10 Ci) Co-60 source to decay to 92.5 GBq (2.5 Ci)?
• Which of the following circuits converts electrical energy to ultrasonic energy?
• Which of the following is the correct formula to use for calculating geometric unsharpness if F=source size, T=specimen thickness, D=source to object distance and Ug=geometric unsharpness: