GPU Event :Trigger On Die work only if there is a lifetime

Hello

I want to make a particle appear when a sphere collides to it. So i have a Kill node in the update with my sphere. If they don't collide with the sphere, my particles don't have a lifetime.
But when i add the trigger event on die, the new particles are always there, even if they don't die. Everything works properly when i set a lifetime on the particles, which i don't.

For now i have set a start lifetime to my particles and i add to them lifetime with total time... it is not perfect but i does the job for now.

I wonder if the probleme may come from the Computed Source code of the trigger event on die node :
eventCount = (age + deltaTime > lifetime || !alive) ? count : 0;

But i couldn't achieved to change it, is there any way ?

Thanks

 

Okay Thank you !!
Looks like it suits=)