Air defined as mixture.

[u/mrichter/AliRoot.git] / STRUCT / AliDIPOv2.cxx

diff --git a/STRUCT/AliDIPOv2.cxx b/STRUCT/AliDIPOv2.cxx
index 12c1fff152b7a849008ae8e6d79b7a6580327418..46c99f35c18a82aeab1cec2bd91707e4aed265b5 100644 (file)
--- a/STRUCT/AliDIPOv2.cxx
+++ b/STRUCT/AliDIPOv2.cxx
@@ -822,6 +822,12 @@ void AliDIPOv2::CreateMaterials()
   Int_t isxfld   = gAlice->Field()->Integ();
   Float_t sxmgmx = gAlice->Field()->Max();
   
+  Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
+  Float_t zAir[4]={6.,7.,8.,18.};
+  Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
+  Float_t dAir = 1.20479E-3;
+  
+  
   Float_t asteel[4] = { 55.847,51.9961,58.6934,28.0855 };
   Float_t zsteel[4] = { 26.,24.,28.,14. };
   Float_t wsteel[4] = { .715,.18,.1,.005 };
@@ -859,11 +865,10 @@ void AliDIPOv2::CreateMaterials()
   AliMaterial(17, "COPPER$   ", 63.55, 29., 8.96, 1.43, 15.1);
   AliMaterial(37, "COPPER$   ", 63.55, 29., 8.96, 1.43, 15.1);
   AliMaterial(57, "COPPER$   ", 63.55, 29., 8.96, 1.43, 15.1);
-    //     Air 
-  AliMaterial(15, "AIR$      ", 14.61, 7.3, .001205, 30423.24, 67500);
-  AliMaterial(35, "AIR$      ", 14.61, 7.3, .001205, 30423.24, 67500);
-  AliMaterial(55, "AIR$      ", 14.61, 7.3, .001205, 30423.24, 67500);
-  
+  //     Air 
+  AliMixture(15, "AIR$      ", aAir, zAir, dAir, 4, wAir);
+  AliMixture(35, "AIR$      ", aAir, zAir, dAir, 4, wAir);
+  AliMixture(55, "AIR$      ", aAir, zAir, dAir, 4, wAir);
   //     Vacuum 
   AliMaterial(16, "VACUUM$ ", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
   AliMaterial(36, "VACUUM$ ", 1e-16, 1e-16, 1e-16, 1e16, 1e16);