Charged Particles : Energy loss & stepping
- Systematic use of the concept of range
| Geant3 | Geant4 |
|---|---|
|  |
|  |
| stmin = R(cutele + 200 keV) if (R(E).le.stmin) : final step = R(E) - R(cutele) | final step = R(E) |
| tracking cuts: cutgam cutele | NO tracking cut! Once created, the particles are tracked down to range=0 |
| Bethe & Moliere theory | No step limitation
from Multiple Scattering (L. Urban model) |
| prod threshold: bcute dcute | Only threshold for production
of secondaries (mainly ionisa. & brems)
|
| Comparison with geometry production of secondaries below threshold if needed |