[Halld-offline] control of decay modes in hdgeant

[Richard Jones]

Kei,

Sure, you can do this, just don't modify the trunk in svn with any such customizations, please.  What to do:

 1. Write your own fortran function custom_decays() and stick it at the bottom of the file uginit.F  -- yes, in fortran !  In this function you should call gsdk once for each decaying particle you want to modify."  See the link below to the docs for gsdk.
 2. Insert a line "call custom_decays" right after "call gpart" in the body of uginit in uginit.F

_http://wwwasdoc.web.cern.ch/wwwasdoc/geant_html3/node73.html#SECTION025000000000000000000000

-Richard Jones
_
On 3/18/2013 11:49 AM, Kei Moriya wrote:
> Hi,
>
> I had a question regarding the decay modes in hdgeant.
> I would like to have control over how my particles decay,
> so that I don't waste 1/3 of my CPU on events that do not
> have the topology I want.
>
> Is there a way to edit some file and specify what the decay
> modes for a given particle should be? I looked around and it
> seems like I need to edit something to do with the function
> gsdk, but can't find any non-executables with it in the repository.
>
> Does anybody have any ideas?
> Thanks,
> 	Kei
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