| 1 | Bidders are shown only a cross section of the ribs. | |
| 2 | You take the flux, multiply it by the cross section, average it, integrate it over the whole volume. | |
| 3 | Now this is a function of cross section, this is a function of energy on a log plot. | |
| 4 | And each one of these has a certain probability of occurrence which is expressed in its own cross section. | |
| 5 | The absorption term also is relatively straight forward, macroscopic absorption cross section times the flux. |