Question

d. 1, 2 and 3 134. A capsule on the well counted 80,000 cpm. It was then dissolved into 1000 ml of water and a 5 ml sample was counted in the well and gave 4000 cpm. Determine the geometry factor for changing on the well counts to in the well counts: a. 50,000 b. 10 c. 5 d. 0.10 135. How many Mev are in one kev: a. 10-6 b) 10-3 c. 106 d. 103 136. The amount of shielding material needed to reduce the radiation intensity to half of its original intensity is called the: a. half-value layer b. absorption coefficient c. mass attenuation coefficient d. linear attenuation coefficient 137. In the nuclear reaction 54Fe(a, pn)X, the product X has: a. A = 57, Z = 28 b. A = 57, Z = 27 C. A = 56, Z = 28 d. A = 56, Z = 27 138. The amount of kinetic energy transferred when ionizing radiation interacts with matter: 1. increases as the particle reaches rest mass 2. is proportional to the velocity of the radiation 3. is inversely proportional to the charge of the radiation a. 1 only b. 1 and 2 only c. 2 and 3 only d. 1, 2 and 3

Answer 1

135. The correct option is b)

One Kev is equal to 0.001 Mev ,hence option b ) is correct

136. The correct option is a) half - value layer. The amount of shielding material needed to reduce the radiation intensity to half of its original intensity is called half -value layer .

137. The correct option is C ).A= 56, Z= 28.

138. The correct option is b ) The amount of kinetic energy transferred when ionising radiation interacts with matter is proportional to the velocity of the radiation and increases as the particle reaches the rest mass .