EGS Lab Activity - Exercise 2
Interactions of 10 MeV photons in aluminum and lead
In this exercise we have simply increased the photon energy from 0.3 MeV to 10 MeV and we would like you to fill in all the blanks in a new set of tables that we have provided for you (below). Simply use Figures 1 through 3, like we did in the previous exercise, to complete the tables.
| Table 3 | ||
|---|---|---|
| Al | Pb | |
| l (cm) | ||
| Pint | ||
| Table 4 | |||
|---|---|---|---|
| Photoelectric | Compton | Pair Production | |
| Al | |||
| Pb | |||
When you have filled in the blanks, use the "EGS to Order" simulation tool to create the images and see if the images match your predictions. This time we recommend that you select an aluminum thickness of 20 cm and a lead thickness of 3 cm. Why? For no special reason other than it will make the tracks in the EGS images a little easier to discern from one another (wait and you will see what we mean). Also, always choose the radius to be half of the thickness because this gives us a nice aspect ratio for the picture. And, make sure your tracks are "spread out" in the Y axis so you can distinguish them.
