64Cu positron spectra problem

[Tien-Phong-PHAM]

Dear Gate-users,

I’m trying to simulate the energy spectrum of a Cu-64 source using the ion definition in GATE v8.2, but i have a problem with the positron emission spectra. In fact, the energy distribution with my ion source is very different with spectral definition in the low energy region. I mean the energy spectrum of positron is similar to the energy spectrum of electron.

In this case, i just used the « RadioactiveDecay » as physics list

I would like to ask if someone has experience with ion type source can help me.

Many thanks for your help !

[BishopWolf]

I think you just used the «RadioactiveDecay» as physics list. You also need to consider daughter decay using also the «Decay»

just add

                #=====================================================
                # Physic List Mechanism
                #=====================================================

                /gate/physics/addPhysicsList    emstandard_opt4
                /gate/physics/addProcess RadioactiveDecay
                /gate/physics/addProcess Decay

[dsarrut]

Hi, thanks Alex. Tien-Phong-PHAM: is it solved now ?

[Tien-Phong-PHAM]

Hi David,

It's not the question of the physics list but a bug on version 8.2 I think because I don't see this problem with version 9.

Sincerely Tien-Phong PHAM

Le jeu. 17 déc. 2020 à 08:11, David Sarrut notifications@github.com a écrit :

Hi, thanks Alex. Tien-Phong-PHAM: is it solved now ?

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[dsarrut]

Hi, sorry, I think the issue was not clear for me ... can you be a bit more specific, please? What did you obtain and what are you expecting? Also, is the problem solved with the current version? thanks!