diff --git a/MOT Capture Process Simulation/@MOTSimulator/accelerationDueToPushBeam.m b/MOT Capture Process Simulation/@MOTSimulator/accelerationDueToPushBeam.m
index 907d702..527baf0 100644
--- a/MOT Capture Process Simulation/@MOTSimulator/accelerationDueToPushBeam.m	
+++ b/MOT Capture Process Simulation/@MOTSimulator/accelerationDueToPushBeam.m	
@@ -14,7 +14,7 @@ function ret = accelerationDueToPushBeam(this, PositionVector, VelocityVector)
     a_push = (Helper.PhysicsConstants.PlanckConstantReduced * this.PushBeamWaveNumber * WaveVectorEndPoint(1:3)/Helper.PhysicsConstants.Dy164Mass).*(this.PushBeamLinewidth * 0.5) .* (s_push/(1+s_push));
              
     if this.SpontaneousEmission
-        a_scatter = this.accelerationDueToSpontaneousEmissionProcess(s_push, s_push, Detuning, this.PushBeamLinewidth, this.PushBeamWaveNumber);
+        a_scatter = this.accelerationDueToSpontaneousEmissionProcess(s_push, s_push, this.PushBeamLinewidth, this.PushBeamWaveNumber);
     else
         a_scatter = [0,0,0];
     end