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Forum: Processes Involving Optical Photons
Re: Question Solving Discrepancies between Scintillation by/not by particle type (Andrew Hanson)
Re: Question Re: Solving Discrepancies between Scintillation by/not by particle type (Zach Hartwig)
Date: 18 Jun, 2013
From: Andrew Hanson <Andrew Hanson>

I should have said that I am using Geant4 9.6.1, though it won't effect this.

> 2. What are the incident energies of your - I presume - neutrons? You
> should certainly ensure that you scintillation data points bracket your
> incident particle energy range.

Turns out this was my problem. I was trying to just create a purely linear relationship (just like the standard SCINTILLATIONYIELD parameter), but I did not take into account that it would not extrapolate with the same linear relationship. With a wider range added, the relationship matches what I was expecting to see.

> 3. How are you determining the photons/energy-deposited metric? I ask
> because the complexity of potential interactions of neutrons in NE213
> can lead to a wide variety of scintillation light production on an
> event-by-event basis. For example, a recoil proton in a head-on
> neutron-hydrogen collision will produce far more light than a
> 12C(n,n)12C scattering event.

In the shown code, I just tried a linear relationship, but going forward, the photons/energy-deposited metric for the various particles is being taken from the work of Cecil et al. (https://scholarworks.iu.edu/dspace/handle/2022/2961). Hopefully applying these at a rather small step spacing and including the entire energy range will go smoothly though I will also include the spline fitting and see how much additional processing time that adds.

Thank you for your time.

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