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1) "fluorescenceTest.mac" is a macro dedicated to test the activation of the fluorescence process in function of the physicsList
- Physics : user or automatic physicsList definition
- Geometry : box (fluoBoxOption.mac) or voxelized phantom (fluoPhantomOption.mac)
- Material : Iodine and Tungsten currently available in data/myGateMaterials.db
- Source : isotropic monoenergetic gamma emission
- Actor : EnergySpectrumActor with a gamma filter (need root)
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2) How to get the atom deexcitation processes :
- with the physicsList-builder :
Choose a physicsList :
/gate/physics/addPhysicsList emlivermore
- with your own physicsList :
Add the following command to your physicsList
/gate/physics/addAtomDeexcitation
In both case, all atom deexcitation processes are automatically activated (fluo, auger, PIXE) for all volume included in the simulation
You still have the possibility to disable those processes by using one of the following commands :
/process/em/fluo false -> disable all deexcitation processes
/process/em/auger false -> disable auger only
/process/em/pixe false -> disable PIXE only
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3) Simulation command :
if using the voxelised phantom, apply first the following commands to get the binary data :
cd data
wget http://www.creatis.insa-lyon.fr/~smekens/voxelisedPhantom.mhd
wget http://www.creatis.insa-lyon.fr/~smekens/voxelisedPhantom.raw
cd ..
then, run the simulation
Gate -a [out,yourFileName] mac/fluorescenceTest.mac
the result is stored in output/yourFileName.root
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4) Interpretation of the results contained in .root :
- Energy spectrum histogram : number of gamma detected in the volume in function of the energy
if fluorescence is activated, the fluorescence x-ray lines as well as the incident energy pic are visible
line energies can be used to confirm the result
line intensities can be also take into account if the statistic is higher enough
bin number and energy range must be set according to the expected result
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5) Theoretical data (http://www.kayelaby.npl.co.uk/atomic_and_nuclear_physics/4_2/4_2_1.html)
K Kb2 Kb1 Kb3 Ka1 Ka1 LI Lg3 Lb3 Lb4 LII Lg1 Lb1 LIII Lb2 La1 La2 Li
Intensity (%) - 5-15 ~20 ~10 100 53-65 - ~5 5-20 20 - 5-25 100 - 5-20 ~90 10 20–5
53 I (keV) 33.168 33.054 32.295 32.239 28.612 28.317 5.186 5.072 4.313 4.257 4.851 4.799 4.221 4.556 4.509 3.938 3.926 3.485
74 W (keV) 69.517 69.100 67.244 66.951 59.318 57.982 12.092 11.675 9.819 9.526 11.535 11.284 9.671 10.199 9.959 8.396 8.335 7.388