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Question Radiation Damage Study - Neutrons 

Forum: Hadronic Processes
Date: 11 Jun, 2015
From: Ankur <Ankur>

Dear Geant experts,

I am Ankur Agrawal,and I am studying the radiation damage of silicon detectors in a Si-W calorimeter, which is a potential upgrade detector for the ALICE experiment, using Geant4.

We plan to base or radiation damage estimates on the Non-Ionizing Energy Loss (NIEL) for hadrons in the detector elements. We performed the preliminary simulation using Geant4VMC interface to get the total energy deposit by the track using Edep() function (as we understand it should include the non-ionizing contribution). Along with this, we also checked the total energy loss by the track by taking the difference of energy of the particle while entering and while leaving and the results are very different.

In most case, for neutrons and protons, the energy lost by the track is not equal to the energy deposited provided by Geant4. We suspect that the non-ionizing contribution is not included in what we get from Geant4 using Edep().

So, for our purpose we have the following queries:

1. If we can get the non-ionizing contribution (especially for neutrons) suing Geant4 and if yes, then how to do it? 2. Which physics list will be best suitable for our radiation damage study? We tried with QGSP_BERT_HP and QGSP_BIC_HP and both seem to give similar results.

If you have any other hints or information on how to estimate radiation damage using Geant4, please also let us know.

Awaiting your reply and thanking you in advance.

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1 Idea: Re: Radiation Damage Study - Neutrons   (Vladimir Ivanchenko - 12 Jun, 2015)
1 None: Re: Radiation Damage Study - Neutrons   (Ankur - 12 Jun, 2015)
1 Idea: Re: Radiation Damage Study - Neutrons   (Vladimir Ivanchenko - 12 Jun, 2015)
2 None: Re: Radiation Damage Study - Neutrons   (Ankur - 12 Jun, 2015)
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