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Defining the angular distribution of the emission does not work with the ion source #475

Open mipbkhn opened 2 years ago

mipbkhn commented 2 years ago

I have recently noticed that the definition of the angular distribution of the emission does not work with the ion source. For example, using the below setting, the emission in simulation is still at all angles. Maybe someone can look into this bug.

/gate/source/pointsource/gps/angtype iso /gate/source/pointsource/gps/mintheta 90 deg /gate/source/pointsource/gps/maxtheta 90 deg /gate/source/pointsource/gps/minphi -90 deg /gate/source/pointsource/gps/maxphi -90 deg

Kind regards, Minh Phuong Nguyen

MaxTousss commented 2 years ago

Greetings,

If my memory serves right, it is not that it does not work with Ion source, but that it is only applied on the Ion source. In short, it means that "pointsource" will emit e+ in the direction specified. However, the e+ travel path is not restricted after its emission AND the emission angle of the particle produced by that e+ are not restricted. In my cases, it meant that gamma particle emitted by these e+ had no angular restriction. Sadly, I never found how to restrain the angular distribution of particles created by a GATE source.

Note: I had explored that problem 3~5 year ago, it might have changed or I might be remembering incorrectly.

mipbkhn commented 1 year ago

I want to come back on this issue that the angular definition of the emission still does not work for ion sources. I also tried with Ac-225, and it did not work. This is not a positron emitter, so the reason is not because of the non-restricted emission angles of the positron annihilation.

Can someone look into this issue?