36. Based on the results of Experiment 1, xhalf for Material 3 and a γ-ray energy of 4 MeV was closest to which of the following values?
Your Answer is
Correct Answer is J
Explanation
First look at the third line of the second paragraph under experiment 2 to understand the definition of Xhalf, that is, the thickness of the material when I=I0/2;
Look at the figure For the curve corresponding to Material 3 in 2, when the ordinate I=I0/2=8000/2=4000, the corresponding abscissa x=4.0 cm