- #1

- 93

- 6

I am trying yo find the flux in a cell which is bounded by two concentric spheres and a cone. When I run the code I get a warning that no cross section tables are called for in this problem and a tally result of zero. The way I defined the surfaces and cells is below if anyone sees where I have made a mistake please let me know. I have also attached the code, output and a screen shot of the geometry plot.

1 Mev photon flux at 100 cm to determine KERMA

C Simulate an isotropic point source of 1 MeV photons

C Cell Cards

109 0 -10 IMP:P,e=1

110 0 -11 10 IMP:P,e= 1 $ cell volume inbetween 97.5 and 102.5 shells

120 0 -12 11 IMP:P,e=0 $ Graveyard

130 0 -11 -13 IMP:p,e=1 $ creates a volume bounded by the conical surface as well as concentric spheres

C Surface Cards

10 SO 97.5 $ Creates a 97.5 cm sphere

11 SO 102.5 $ Creates a 102.5 cm sphere

12 SO 200 $ creates graveyard

13 KY 0 0.0625 1 $ creates a conical surfface

C Data Cards

MODE p e $photon and electron transport

C tally card

*F4:p 130

1 Mev photon flux at 100 cm to determine KERMA

C Simulate an isotropic point source of 1 MeV photons

C Cell Cards

109 0 -10 IMP:P,e=1

110 0 -11 10 IMP:P,e= 1 $ cell volume inbetween 97.5 and 102.5 shells

120 0 -12 11 IMP:P,e=0 $ Graveyard

130 0 -11 -13 IMP:p,e=1 $ creates a volume bounded by the conical surface as well as concentric spheres

C Surface Cards

10 SO 97.5 $ Creates a 97.5 cm sphere

11 SO 102.5 $ Creates a 102.5 cm sphere

12 SO 200 $ creates graveyard

13 KY 0 0.0625 1 $ creates a conical surfface

C Data Cards

MODE p e $photon and electron transport

C tally card

*F4:p 130