How to bias the particle deuterium or other ions?

The projection need to bias the particle deuterium, but i seemed it did not work when using
the particle name “deuterium”, the key code is:
biasingPhysics->Bias(“deuterium”);

so how to bias the particle deuterium or other ions?

_Geant4 Version:_11.1.1
_Operating System:_Ubuntu 20.04
_Compiler/Version:_GCC 9.4.0
_CMake Version:_3.16.3


The particle name is “deuteron”, not “deuterium”. Similarly, for tritium the particle name is “triton”.

@mkelsey , thanks, but the biasing technique of forced collision does not work for charged particle.