Yes, and No
Your best bet for this situation would be to keyframe either the LifespanPP, and/or the OpacityPP of the sphere particles since you know exactly when they will be colliding with the second plane.
Do a search in the Maya doc's for those 2 attributes, and it should tell you how to apply them
Good luck, and post a playblast if you can to show us better what you mean
Israel "Izzy" Long
Motion and Title Design for Broadcast-Film-DS
izzylong.com