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4.3.12
SUBROUTINE ZDLPAR(EGAMMA, ATMNB, LAMBDA) : Lambda for PAiR-production
This routine finds the mean free path (LAMBDA) until e+e- pair-
production occurs by a photon with a given energy.
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ARGUMENTS:
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INPUT :
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EGAMMA : The energy of the photon.
ATMNB : Atom-number of the material
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OUTPUT :
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LAMBDA : The mean free path, in radiation lengths. -ve if below
cut-off
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IMPLICIT INPUTS:
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none.
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IMPLICIT OUTPUTS:
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none
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CALLED BY :
- ZDPAIR, generate PAIR production
(see 4.3.10).
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CALLED ROUTINE(S):
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none
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SIDE EFFECTS:
- none
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AUTHORS:
- M. Berggren, UFRJ (adopted from the anonymous SXPPAR in DELSIM)
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CREATION DATE:
- 03-apr-1996
Mikael Berggren
2003-03-27