Subroutines

CALL GMUNUI GMUNUI computes and stores in the appropriate bank the value of the muon-nucleus cross-section for a given material. It is called at initialisation time by GPHYSI. CALL GMUNU GMUNU is called by GTMUON every time a muon-nucleus interaction has to happen. It generates the final state particles as well as the outgoing muon. A call to GUHADR is performed if IMUNU (which is the variable set by the MUNU data record) is equal to 1. An inelastic interaction is forced (which could also be a fission in case of heavy materials). The secondaries from the $\pi$ -nucleus interaction are always generated if IMUNU is equal to 1, irrespectively of the value of IHADR.

Note: IMUNU should be set to 1 only when using the GHEISHA hadronic interactions package. Setting it to 1 when using FLUKA can give unpredictable results.

GMUSIGVALUE = GMUSIG(E,E1,COSTET)

E

( REAL) initial $\mu$ energy;

E1

( REAL) final $\mu$ energy;

COSTET

( REAL) $\mu$ scattering angle.