I am playing with Recipe 48 from Jitter Recipe book 4.
http://cycling74.com/2012/03/20/jitter-recipes-book-four/5/

I am trying to figure out how to turn off the particle generator without clearing the already generated particles. What is the best way to do this?

One way I was trying to do this was by shortening the life of the particle, but it seems that any changes in the parameters I make effect all the particles currently generated.

Is there a way to attach to a particle the parameters that were in place at the moment that particle was generated?