|Message: Re: Solving Discrepancies between Scintillation by/not by particle type||Not Logged In (login)|
Click on the Forum title, e.g. on the "Forums by Category" page, to read a sequence of postings to the Forum and its threads all in one page. If you are only interested in one thread or the thread following a specific posting, click the thread or the posting, which takes you to a smaller page, which contains only the part you are interested in and may be easier to navigate.
Messages are "chained" if there are only replies at the first level, i.e. 1/1.html, 1/1/1.html etc. In case of "chained" messages the message number is replaced by the icon and there is no indentation.
Inline: Display the subject line only or also the text of the posting(s); for the choice "All" the "Outline" choices are switched off.
|1||0||1||no text / full text of posting|
|2||1||All||text for level 1 only / text for All postings|
Outline: Choose the depth of the posting thread, successive toggle controls provide increasing detail.
|1||2||1||2 levels / 1 level (original posting)|
|2||3||2||3 levels / 2 levels|
|3||3||All||3 levels / all levels (all postings)|
A few ideas/questions for you:
1. What version of Geant4 are you using?
I ask because ScintillationByParticleTypeMethod() must interpolate between the scintillation data points that you enter in the G4MaterialPropertiesTable in order to compute the scintillation yield for any energy deposited. When this method was first implemented a few years ago, the interpolation was handled very crudely, requiring the user to implement many data points to define their scintillation yield. Recent versions of Geant4 now use the more advanced interpolation methods found in the G4PhysicsOrderedFreeVector class (I can't remember when exactly the switch occured...maybe someone else can comment?) enabling better results with fewer data points.
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.
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.
|Inline Depth:||Outline Depth:||Add message:|