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Keywords: physics list, neutron, proton
Forum: Physics List
Re: Question secondary neutrons from proton beam (Stephen Dowdell)
Date: 09 May, 2008
From: Gunter Folger <Gunter Folger>


You will need a cascade model to get a good description of neutrons produced from a proton beam. In you mail you are not specific about if you need to propagate these neutrons also down to low energies. If interactions and transport of neutrons below few MeV are important, you will also need the neutron_HP models.

For physics lists, as you don't care about high energies, either list having _BIC or _BERT shall ok, so use QGSP_BIC or QGSP_BERT. Our experience is that at your energies BIC is slightly better.

If you need transport of low energy neutrons as well, then add _HP to the above names; the transport of neutrons down to thermal energies however has a cost in CPU.


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