Particles not aligning to collision object surface

I am trying to do a simple explosion where particles shoot into the air then fall onto a collision object (a plane).

However, when they make contact they partially stick through the collision object. How can I make them align just to the surface of the collision object?

There are plenty of tutorials of explosions in space or being shot or dropping but none I could find of a ground surface exploding (like someone has hits concrete with a sledgehammer).

Help pleaseā€¦:frowning:

Thanks. Great reply.

After much trial and error, I did use the Game Engine and lowered the gravity in the world settings. Added a plane, used cell fracture and another plane with collision bounds. Works like a charm but would be nice to have trace particle option as fractured plane breaks apart.