CONS199 The Material data structure JMATE

Figure: JMA = LQ(JMATE-IMATE) pointer to material IMATE

When the subroutine GPHYSI is called at initialisation time the following substructure is created for each material whose number is refered to by any of the user defined tracking media.

Figure: Material data structure

Note: The energy losses are stored in . The inverse of the macroscopic cross-section (i.e. the mean free path, in cm), is stored instead of the cross-section, to speed up the calculation of the distance to the next interaction point.

• Energy binning
• Energy loss for electrons and positrons
• Energy loss for muons
• Energy loss for other charged particles
• Some material constants
• Mixture and compound parameters
• Photo-electric effect. Muon nuclear interaction
• Positron annihilation
• Compton scattering
• Bremsstrahlung for electrons and muons
• Pair production by gammas and muons
• Delta ray production by electrons and muons
• Photo-fission