|Message: Re: Understanding nCapture in Geant4: Capture on 28Si||Not Logged In (login)|
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So in silica plot I show the results I collected in the following scenario:
Silica target 10x10x5 m3 Neutron into target, Eo=14MeV Physics list QGSP_BIC_HP The curve with a max. energy of about 33 MeV (red) corresponds to total gamma energy from neutron capture events. The other curve corresponds to inelastic events.
Total gamma energy was obtained in the stepping action class by detecting if an event was a nCapture or a NeutronInelastic, then tapping in the secondary vector and adding all the gamma energies in either of the aforementioned interactions. Notice that I am aware the secondary vector contains all the secondaries collected so far in the event. However, I am only adding those gammas just produced for those events.
The other two files corresponds to scattering using different physics list when the target is liquid hydrogen.
Something I notice is that the odd energies above the expected value of 2.2MeV correspond to events with multiple gamma emission.
Physics list tested: QGSP_BIC_HP*, QGSP_BIC*, QGSP_BERT_HP*, QGSP_BERT*,FTFP_BERT*
C. Attachment: http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2013/01/24/12.22-30213-silica_HIGH_BIC_HP.jpg http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2013/01/24/12.22-44284-tron_diffPhysList_log.jpg http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2013/01/24/12.22-29367-n_diffPhysList_zoomIn.jpg
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