Subroutines

CALL GBREMM GBREMM generates a photon from bremsstrahlung of a highly energetic muon as a discrete process. For the angular distribution of the photon, is calls the function GBTETH.

Input:

via common GCTRAK;

Output:

via common GCKING.

GBREMM is called from the tracking routine GTMUON when the muon reaches its radiation point during the tracking stage of GEANT.

GBTETHVALUE = GBTETH(ENER,PARTM,EFRAC)

ENER

( REAL) kinetic energy of the muon;

PARTM

( REAL) mass of the radiating particle ($m$_μ in this case);

EFRAC

( REAL) ratio of the energy of the radiated photon to the energy of the muon.

GBTETH calculates the angular distribution of the pair in photon pair production and of the photon in bremsstrahlung. In case of bremsstrahlung it gives the scaled angle ($\eta =\; E\theta m-1$ ) of the photon.