Radioactive Decay Module: Time biasing can not be switched off


I am working on activation related subject, and I am currently looking at the Radioactive Decay Module in Geant4 and, more particularly, the statistical approach.

The Physics Reference Manual (Version 11.0) states, “The user may switch on one or more of the following variance reduction schemes, which can provide significant improvement in the modeling efficiency.” On the other hand, it seems that the time biasing, either by the measurements or the time source profiles, can not be avoided (with default values between 0 and 1 sec).

How can I do that if I would like only to have the Branching Ratio Bias?

I already thank you for your help,

Eliott Ramoisiaux