fixed default collision_rate in LangevinIntegrator
@@ -945,7 +945,7 @@ class LangevinIntegrator(ThermostatedIntegrator):
def __init__(self,
temperature=298.0 * simtk.unit.kelvin,
- collision_rate=1.0 / simtk.unit.picoseconds,
+ collision_rate=91.0 / simtk.unit.picoseconds,
timestep=1.0 * simtk.unit.femtoseconds,
splitting="V R O R V",
constraint_tolerance=1e-8,
