Particle surface interaction

[Diurno]

Hi all, i've a little problem: i've a particle system that has to interact with an object; and this object is moving really quick.
I've tried to set the Bounce off Surface, and until the object is moving slow it works perfectly; but when it moves fast some particle can't avoid it and enter in the geometry...

Now my question is if there is any parameter with which i can increasi the precision on the geometry interaction....