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Subroutines

GANNI generates the annihilation of a positron into either one or two photons. It uses the following input and output:

input:: via common /GCTRAK/
output:: via common /GCKING/

The routine is called automatically from the tracking routine GTELEC, when the positron reaches its interaction point during the tracking. CALL GANNIR GANNIR generates the positron annihilation at rest. It is called from the tracking routine GTELEC, if the positron energy is below the cut-off energy CUTELE in common block /GCCUTS/.

Janne Saarela
Mon Apr 3 12:46:29 METDST 1995