XYZ range in usrbin card

[horvathd (Dávid Horváth)]

Dear Li,

The value of Z is correctly sampled even in your first source routine. If you score ALL-PART instead of DOSE, it is clearly visible.

One thing is not clear to me, if you want to sample on the surface of the AGGG region (in this case the sampling is correct), or in the volume (here you need to sample the radius correctly as well.)

For the problem of isotropic direction see:

Biasing in Lead shielding

Dear Raksha, the issue is with your source routine. You left the default particle direction assignment as is: TXFLK (NPFLKA) = UBEAM TYFLK (NPFLKA) = VBEAM TZFLK (NPFLKA) = WBEAM This means the direction cosines UBEAM, VBEAM and WBEAM are taken from the BEAMPOS card (if it is not present, then the direction is along the positive z axis). In the source routine the Isotropic angular divergence option set on the BEAM card is not taken into account. You need to specify it manually. The easie…

Cheers,
David