Source definition

[yoongschoi]

I was trying to place an isotropic source (Cs-137, 0.662 MeV) right underneath the geometry but it doesn't work. What did I do wrong with the source definition in this code?

#################################################
################## Source #######################
#################################################

:start source definition:

:start source:
library = egs_isotropic_source
name = source
position = 25 25 0

:start spectrum:
type = monoenergetic
energy = 0.662
:stop spectrum:

charge = 0
:stop source:

simulation source = source

:stop source definition:

[mxxo]

I can't confirm with egs_view right now but it might be that you're missing the shape input of the isotropic source? Try defining your source with a point shape:

:start shape:
    type = point
    position = 25 25 0 
:stop shape:

I believe if you run egs_view from the terminal, you should be able to see any errors printed upon loading the file.

[yoongschoi]

Yeah you're right, I didn't know I had to set shape. Thanks a lot!