[Gate-users] Building the angular distribution using the information from phase space actor output

[Elnur Sadihov]

Dear gate users,

I am using phase space actor which is attached to flat detector. The
geometry is simple: there are source, water box phantom and tungsten
detector (I chose tungsten because of its high density - in order to absorb
the most part of gamma quanta). The output file of the phase space actor is
root file with the tree that comprises the following "leaves" (this is a
ROOT terminology): kinetic energy, position and direction of particles
entering the detector. The direction is along each axis: x, y and z. So, if
I right understand, I have three separate distributions of directional
cosines and three separate distributions of coordinates (x, y and z). I am
trying to understand, in which way can I match x, y, z coordinates and
directional cosines along x, y, z axes with each other and then build the
angular distribution (polar and azimuthal angles) for gamma quanta which
fall to the detector?

I am very appreciate for any help or advice,

Best regards,
Elnur
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