Thank you, thank you very much for your quick answer! I forgot to mention that I use an old Version of C4D, Release 13. That is also why I do not have the Plugins Color Mapper and Particle Group. So it is not possible in R13, just as I expected. So I shall try to get the result i wanted with visible light with animated brightness. Thank you very much again.

How to animate the material of particles of an emitter-object?

I want to animate the material of the emitted spheres of an emitter-object. When emitted the color must be bright and get darker frame by frame. And this must happen with each newly emitted sphere.
When I animate the color brightness by key all spheres together get slowly darker, also the newly emitted spheres. So at the end of the animation the newly emitted sphere has the darkest color - like each other sphere.
What do I have to do to get what I want?

This is frustrating.

I cannot post a question in the "questions and answers" forum.
Only here in the "Site issues" forum I find a button for "New topic."
Please help me! I desparately want to ask a question about material animation.