Sure. Choice of school has practically nothing to do with entering grad school, provided you can learn material and get research experience (and really, all you need is a library, a phone and determination to get those).
Carleton is one of the best places to do undergrad research (at least, provided you like particle physics or medical physics); that'll look good on any grad school application.
If you don't live in Ottawa right now, I'm not sure if they'd be my first choice, but if you do, then yeah, you should definitely consider going there (or uOttawa, which is practically the same, only slightly larger / better courses / less well-known research - although you're allowed to take uOttawa courses while at carleton, and vice versa).