Can you get extra exp from Crit/Combo Kills?

in some games it's possible to get extra exp from multi-kills or Crit kills, is it possible for Destiny?

I tried some testing in the Intro level: The Dregs give +20 exp, and the Vandals give +35 exp.

I tried doing some testing with combo kills, (x enemies in y seconds), and Critical kills (headshot kills, all head shots), but I couldnt figure out any patterns.

Is it possible?