diff --git a/NPSimulation/Detectors/ChiNu/ChiNu.cc b/NPSimulation/Detectors/ChiNu/ChiNu.cc
index c6f7e6e05c48d6465150e13ec5dd6ee40d326353..2f2eaa5b7a1486b8d4945836fd615a5f9a940a79 100644
--- a/NPSimulation/Detectors/ChiNu/ChiNu.cc
+++ b/NPSimulation/Detectors/ChiNu/ChiNu.cc
@@ -420,7 +420,10 @@ void ChiNu::ReadConfiguration(NPL::InputParser parser){
 // Construct detector and inialise sensitive part.
 // Called After DetecorConstruction::AddDetector Method
 void ChiNu::ConstructDetector(G4LogicalVolume* world){
-  
+ 
+  G4Material* Air = MaterialManager::getInstance()->GetMaterialFromLibrary("Air");
+  //world->SetMaterial(Air);
+
   for (unsigned short i = 0 ; i < m_R.size() ; i++) {
 
     G4double wX = m_R[i] * sin(m_Theta[i] ) * cos(m_Phi[i] ) ;
diff --git a/Projects/ChiNu/Analysis.cxx b/Projects/ChiNu/Analysis.cxx
index c594da7654e01e7488958daae4551df71557f596..05863c3778f662b54f55076ceb5fedc7fa8a559a 100644
--- a/Projects/ChiNu/Analysis.cxx
+++ b/Projects/ChiNu/Analysis.cxx
@@ -44,7 +44,7 @@ void Analysis::Init(){
   InitInputBranch();
   InitOutputBranch();
 
-  my_Reaction = new NPL::Reaction("1n(238U,1n)238U@1.5");
+  my_Reaction = new NPL::Reaction("1n(238U,1n)238U@0.75");
 
   neutron = new NPL::Nucleus("1n");
 }
@@ -83,7 +83,7 @@ void Analysis::TreatEvent(){
 
       double DeltaTheta = atan(89.0/Rdet);
       double random_ThetaLab = ra.Uniform(init_ThetaLab-DeltaTheta, init_ThetaLab+DeltaTheta);
-      double dEx = my_Reaction->ReconstructRelativistic(Elab[i], init_ThetaLab);
+      double dEx = my_Reaction->ReconstructRelativistic(Elab[i], random_ThetaLab);
       
       ThetaLab.push_back(random_ThetaLab/deg);
       Ex.push_back(dEx);