|Message: Why the energy depositions of different SCINTILLATIONYIELD are different||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)|
I am simulating an x-ray detector. The incident x-ray energy is 30keV. There is a scintillator. The thickness is 5um. The scintillator is devided into a lot of small cubes. After /run/beamOn 3e6, I draw the energy deposition along its direction of thickness. I find that the results of SCINTILLATIONYIELD=0./MeV and 26000./MeV are not the same. The energy deposition curve of SCINTILLATIONYIELD=0./MeV is higher than the other one. I do not understand why.
I calculate the number of different processes. Left is SCINTILLATIONYIELD=0./MeV, right is SCINTILLATIONYIELD=26000./MeV Total energy deposition(75.789GeV,60.122GeV), Rayl(171672,164252), phot(2992043,2838807), compt(39177,36176), Scintillation(41305895,31567245), eIoni(76873904,60274751), eBrem(33467,26332), msc(1620826,1063048), CoupledTransportation(8046237,1469901405), StepLimiter(46754968,11310279).
For SCINTILLATIONYIELD=26000./MeV, there is an absorption, only 192 optical photons. The energy of the optical photons is 2.95eV. So I think the difference is not from this.
For the optical process, I have a bounce limit. counterBounce represents the number of FresnelReflection. When the status is TotalInternalReflection, if counterBounce is more than bounce limit, kill this optical photon.
I simulate with differnt bounce limit(20,60,100). I find if the bounce limit increases, the result of SCINTILLATIONYIELD=26000./MeV will be closer to the result of SCINTILLATIONYIELD=0./MeV.
I have been thinking this question for almost one month. Help me please.