When analysing an energy deposition profile in a multilayer object I have been finding that there is consistently a spike in energy deposited at the interface of the two layers, regardless of the defined materials.
For example, a Si-Si block with a combined thickness of 2um and interface at 0.4um there will be a spike of energy deposited at 0.4um.
Initially I believed this to be a factor of changing densities between two materials, however, the test with two Silicon blocks has pointed to it being something more.
Is this a common issue in GEANT? Any help would be appreciated.