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Forum: Physics List
Re: Question Simulation of activated materials (Nicola Mori)
Date: 05 Jun, 2015
From: Michael H. Kelsey <Michael H. Kelsey>

On Fri, 05 Jun 2015 12:44:05 GMT, Nicola Mori wrote:
> I have to simulate the effects of decay products coming from activated
> materials due to the passage of cosmic rays in space. I'm studying an
> X-ray detector which may suffer from this kind of background. Is there
> any ready-to-use physics list to simulate the activation and the
> subsequent decay of passive materials? If not, what do I have to add to
> standard physics lists (e.g. FTFP_BERT) in order to take into account
> these processes? Thanks.

You can do this by adding RadioactiveDecayPhysics to any of the standard physics lists (it's already in Shielding), for example,

   FTFP_BERT* physlist = new FTFP_BERT;
   physlist->RegisterPhysics(new RadioactiveDecayPhysics);

Now, in your event, if a radionuclide is produced, it will be decayed. In fact, the whole chain will be followed before the event finishes, so you'll need to have analysis cuts based on the timestamps of the tracks to know what is relevant to your situation. You can also use StackingAction to take long-lived tracks and push them off to a later event.

You may also want to look at extended example rdecay02.

  -- Michael Kelsey

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