[Gate-users] One Dimensional Cross Section of Positron emitters (C11, O15) During Proton Therapy

[Atiq Ur Rahman]

Dear Users,
I am running an a Gate code of Proton Therapy using 130 MeV Proton beam. My
goal is to get the one dimensional distribution of Cross-Section of C!1 and
O15. I was expecting a distribution which directly can compared withe the
Positron production (numbers) along the depth (Like a Bragg Peak). I am
using the following code
 */gate/actor/addActor CrossSectionProductionActor beta *
*/gate/actor/beta/attachTo volume        /gate/actor/beta/save
test_small.hdr  *
*/gate/actor/beta/addO15 true *
*/gate/actor/beta/addC11 true*
* /gate/actor/beta/setVoxelSize 40 80 1 mm *
*/gate/actor/beta/saveEveryNEvents 10000000  *
*The size of the Phantom is XYZ=40x80x125 mm^3. I have attached the actor
with the phantom. *
*But I am getting a weird  distribution of the cross section. *
[image: image.png]
I want to compare with the the number of Positron produced along the
depth which is shown number_Of_Positrons_C11.JPG
[image: image.png]
In my perception, the both distributions should have similar trend and
should be comparable with each other. *Why  cross section does not look
like Bragg Peak?  How can I fix it? *
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